MCP9803 - Electronic component Microchip - Free user manual and instructions

USER MANUAL MCP9803 Microchip

Devices For Use With Sensors

Temperature Sensors ADCs Op Amps MICROCHIP MCP4161 MICROCHIP MCP6N11 MICROCHIP MCP4728 MICROCHIP MCP9808 MICROCHIP MCP3551 DACs Digital Potentiometers 366 3.66 R1 R2 R1 R2 366 3.66 R1 R2 366

Design ideas in this guide use the following devices.

A complete device list and corresponding data sheets for these products can be found at www.microchip.com/analog.

Operational Amplifiers	Instrumentation Amplifiers	Comparators	Analog-to-Digital Converters	Digital Potentiometers	Digital-to-Analog Converters	Voltage References	Temperature Sensors
MCP6XX	MCP6NXX	MCP654X	MCP30XX	MCP40XX	MCP47XX	MCP1525	MCP98XX
MCP6XXX		MCP656X	MCP32XX	MCP40D1X	MCP48XX	MCP1541	MCP9700/A
MCP6VXX		MCP65R4X	MCP33XX	MCP41XX	MCP49XX		MCP9701/A
MCP6HXX			MCP34XX	MCP42XX	MCP47DA1
			MCP35XX	MCP43XX	MCP47A1
			MCP39XX	MCP45XX	TC132X
				MCP46XX
				MCP41XXX
				MCP42XXX

Signal Chain Overview

Typical sensor applications involve the monitoring of sensor parameters and controlling of actuators. The sensor signal chain, as shown below, consists of analog and digital domains. Typical sensors output very low amplitude analog signals. These weak analog signals are amplified and filtered, and converted to digital values using op amps, analog-to-digital or voltage-to-frequency converters, and are processed at the MCU. The analog sensor output typically needs proper signal conditioning before it gets converted to a digital signal.

The MCU controls the actuators and maintains the operation of the sensor signal conditioning circuits based on the condition of the signal detection. In the digital to analog feedback path, the digital-to-analog converter (DAC), digital potentiometer and Pulse-Width-Modulator (PWM) devices are most commonly used. The MOSFET driver is commonly used for the interface between the feedback circuit and actuators such as motors and valves. Microchip offers a large portfolio of devices for signal chain applications.

Typical Sensor Signal Chain Control Loop

graph TD
    subgraph Sensors
        A["Sensor Image"] --> B["Reference Voltage"]
        B --> C["MUX"]
        C --> D["Filter"]
        D --> E["ADC/V-to-Freq"]
        E --> F["PIC® MCU or dsPIC® DSC"]
        F --> G["DAC/PWM"]
        H["Actuator"] --> I["Motors, Valves, Relays, Switches, Speakers, Horns, LEDs"]
        I --> J["Driver (MOSFET) Op Amp"]
        J --> K["Digital Potentiometer"]
        K --> L["Amp"]
    end

    subgraph Actuators
        M["Sensors"] --> N["Sensor Image"]
        O["Actuator"] --> P["Actuator"]
        Q["Sensor Image"] --> R["Sensor Image"]
        S["Actuator"] --> T["Actuator"]
    end

    subgraph Digital DomainAnalog Domain
        U["Indicator (LCD, LED)"] --> V["ADC/V-to-Freq"]
        V --> W["PIC® MCU or dsPIC® DSC"]
        W --> X["DAC/PWM"]
        X --> Y["Actuator"]
    end

    C --> Z["Filter"]
    Z --> AA["MUX"]
    AA --> AB["Reference Voltage"]
    AA --> AC["Amp"]
    AC --> AD["Actuator"]
    AD --> AE["Driver (MOSFET) Op Amp"]
    AE --> AF["Actuator"]

Many system applications require the measurement of a physical or electrical condition, or the presence or absence of a known physical, electrical or chemical quantity. Analog sensors are typically used to indicate the magnitude or change in the environmental condition, by reacting to the condition and generating a change in an electrical property as a result.

Typical phenomena that are measured are:

■ Electrical signal and properties
■ Magnetic signal and properties
Temperature
Humidity
■ Force, weight, torque and pressure
■ Motion and vibration
Flow
■ Fluid level and volume
Light and infrared
Chemistry/gas

There are sensors that respond to these phenomena by producing the following electrical properties:

Voltage
Current
Resistance
Capacitance
Charge

This electrical property is then conditioned by an analog circuit before being driven to a digital circuit. In this way, the environmental condition can be “measured” and the system can make decisions based on the result.

The table below provides an overview of typical phenomena, the type of sensor commonly used to measure the phenomena and electrical output of the sensor.

For additional information, please refer to Application Note AN990.

Summary Of Common Physical Conditions and Related Sensor Types

Phenomena Sensor Electrical Output
Magnetic	Hall Effect Voltage
	Magneto-Resistive Resistance
Temperature	Thermocouple Voltage
	RTD Resistance
	Thermistor Resistance
	IC Voltage
	Infrared Current
Humidity	Capacitive Capacitance
	Infrared Current
Force, Weight, Torque, Pressure	Strain Gauge Resistance/Voltage
	Load Cell Resistance
	Piezoelectric	Voltage or Charge
	Mechanical Transducer	Resistance, Voltage, Capacitance
Motion and Vibration	LVDT	AC Voltage
	Piezoelectric	Voltage or Charge
	Microphone	Voltage
	Ultrasonic Voltage, Resistive, Current
	Accelerometer	Voltage
Flow	Magnetic Flowmeter	Voltage
	Mass Flowmeter	Resistance/Voltage
	Ultrasound/Doppler	Frequency
	Hot-wire Anemometer	Resistance
	Mechanical Transducer (turbine)	Voltage
Fluid Level and Volume	Ultrasound	Time Delay
	Mechanical Transducer	Resistance/Voltage
	Capacitor	Capacitance
	Switch	On/Off
	Thermal	Voltage
Touch	Capacitance	Voltage
	Inductance	Current
	Resistance	Frequency
Proximity	Capacitance	Voltage, Frequency
	Inductance	Current, Frequency
	Resistance	Voltage, Current
Light	Photodiode	Current
Chemical	pH Electrode	Voltage
	Solution Conductivity	Resistance/Current
	CO Sensor Voltage or Charge
	Photodiode (turbidity, colorimeter)	Current
	Ion Sensor	Current

Operational Amplifiers (Op Amps)

Microchip Technology offers a broad portfolio of op amp families built on advanced CMOS technology. These families are offered in single, dual and quad configurations, which are available in space saving packages.

These op amp families include devices with Quiescent Current (Iq) per amplifier between 0.45 A and 6 mA, with a Gain Bandwidth Product (GBWP) between 9 kHz and 60 MHz, respectively. The op amp with lowest supply voltage (VDD) operates between 1.4V and 6.0V, while the op amp with highest VDD operates between 6.5V and 16.0V.

These op amp families fall into the following categories: General Purpose, Precision (including EPROM Trimmed and mCal Technology) and Zero-Drift.

Instrumentation Amplifiers (INA)

Microchip has expanded its portfolio of amplifiers with the industry's first instrumentation amplifier featuring mCal technology. The MCP6N11 features rail-to-rail input and output, 1.8V operation and low offset/offset drift.

Comparators

Microchip offers a broad portfolio of low-power and high-speed comparators. The MCP6541 and MCP6561 family of comparators provide ultra low power, 600 nA typical, and higher speed with 40 ns propagation delay, respectively. Both families of comparators are available with single, dual and quad, as well as with push-pull and open-drain output options (for MCP6546 and MCP6566). The MCP65R41 and MCP65R46 family of push-pull and open-drain output comparators are offered with integrated reference voltages of 1.21V and 2.4V receptively. This family provides ±1% typical tolerance while consuming 2.5 μA and high speed with 4μs propagation delay. These comparators operate with a single-supply voltage as low as 1.8V to 5.5V, which makes them ideal for low cost and/or battery powered applications.

Programmable Gain Amplifier (PGA)

The MCP6S21/2/6/8 and MCP6S91/2/3 PGA families give the designer digital control over an amplifier using a serial interface (SPI bus). An input analog multiplexer with 1, 2, 6 or 8 inputs can be set to the desired input signal. The gain can be set to one of eight non-inverting gains: +1, 2, 4, 5, 8, 10, 16 and 32 V/V. In addition, a software shutdown mode offers significant power savings for portable embedded designs. This is all achieved in one simple integrated part that allows for considerably greater bandwidth, while maintaining a low supply current. Systems with multiple sensors are significantly simplified.

The MCP6G01 family are analog Selectable Gain Amplifiers (SGA). The Gain Select input pin(s) set a gain of +1 V/V, +10 V/V and +50 V/V. The Chip Select pin on the MCP6G03 puts it into shutdown to conserve power.

Analog-to-Digital Converters (ADC)

Microchip offers a broad portfolio of high-precision Delta-Sigma, SAR and Dual Slope A/D Converters. The MCP3550/1/3 Delta-Sigma ADCs offer up to 22-bit resolution with only 120 A typical current consumption in a small 8-pin MSOP package. The MCP3421 is a single channel 18-bit Delta-Sigma ADC and is available in a small 6-pin SOT-23 package. It includes a voltage reference and PGA. The user can select the conversion resolution up to 18 bits. The MCP3422/3 and the MCP3424 are two channel and four channel versions, respectively, of the MCP3421 device. The MCP300X (10-bit), MCP320X (12-bit) and MCP330X (13-bit) SAR ADCs combine high performance and low power consumption in a small package, making them ideal for embedded control applications. The MCP3911 analog front end offer two simultaneously sampled 24-bit Delta-Sigma ADCs making it ideal for voltage and current measurement, and other data acquisition applications.

The “Analog-to-Digital Converter Design Guide” (Microchip Document No. 21841) shows various application examples of the ADC devices.

Microchip also offers many high accuracy energy metering devices which are based on the Delta-Sigma ADC cores. The “Complete Utility Metering Solution Guide” (Microchip Document No: 24930) offers detailed solutions for metering applications.

Voltage References

Microchip offers the MCP15XX family of low power and low dropout precision Voltage References. The family includes the MCP1525 with an output voltage of 2.5V and the MCP1541 with an output voltage of 4.096V. Microchip's voltage references are offered in SOT23-3 and TO-92 packages.

Temperature Sensors

Microchip offers a broad portfolio of thermal management products, including Logic Output, Voltage Output and Serial Output temperature sensors. These products allow the system designer to implement the device that best meets the application requirements. Key features include high accuracy (such as MCP9808, with ±0.5^ maximum accuracy from -20^ to 100^ ), low power, extended temperature range and small packages. In addition, other Microchip products can be used to support Thermocouple, RTD and Thermistor applications.

Digital Potentiometers

Microchip's family of digital potentiometers offer a wide range of options. These devices support the 6-bit through 8-bit applications. Offering both volatile and non-volatile options, with digital interfaces from the simple Up/Down interface to the standard SPI and I ^2 C ^TM interfaces. These devices are offered in small packages such as 6-lead SC70 and 8-lead DFN for the single potentiometer devices, 14-lead TSSOP and 16-lead QFN packages for the dual potentiometer devices, and 20-lead TSSOP and QFN packages for the quad potentiometer devices. Non-volatile devices offer a Wiperlock ^TM Technology feature, while volatile devices will operate down to 1.8V. Resistances are offered from 2.1 kΩ to 100 kΩ. Over 50 device configurations are currently available.

The “Digital Potentiometer Design Guide” (Microchip Document No. 22017), shows various application examples of the digital potentiometer devices.

Digital-to-Analog Converters (DAC)

Microchip's family of Digital-to-Analog Converters (DACs) offer a wide range of options. These devices support the 6-bit through 12-bit applications. Offering both volatile and non-volatile options, and standard SPI and PC digital interfaces. These devices are offered in small packages such as 6-lead SC70, SOT-23 and DFN (2 × 2) for the single output devices and 10-pin MSOP for quad output devices. Some versions support selecting either the device VDD, the external voltage reference or an internally generated voltage reference source from the DAC circuitry. Devices with nonvolatile memory (EEPROM) allow the device to retain the programmed output code and DAC state through power down events.

These DAC devices provide high accuracy and low noise and are ideal for industrial applications where calibration or compensation of signals (such as temperature, pressure or humidity) is required.

Local Sensing

Local sensors are located relatively close to their signal conditioning circuits, and the noise environment is not severe; most of these sensors are single ended (not differential). Non-inverting amplifiers are a good choice for amplifying most of these sensors' output because they have high input impedance, and require a minimal amount of discrete components.

Key Amplifier Features

Low cost
• General purpose op amps
■ High precision
- Low offset op amps
• Zero-drift op amps
• Low noise op amps

Rail-to-rail input/output

• Most op amp families

■ High input impedance

• Op amps with CMOS inputs

■ Low power and portable applications

• Low power op amps

■ High voltage

• High voltage op amps

■ High bandwidth and slew rate

High Side Current Sensing Amplifier

V1 R1 R2 VREF RSEN ISEN V2 R1 R2 VDD + MCP6HXX - VOUT RSEN << R1, R2 VOUT = (V1 - V2) (R2/R1) + VREF

Sensors and Applications

Single Sensors

Thermistors for battery chargers and power supply temperature protection
■ Humidity Sensors for process control
■ Pyroelectric infrared intrusion alarms, motion detection and garage door openers
■ Smoke and fire sensors for home and office
■ Charge amplifier for Piezoelectric Transducer detection
■ Thermistor for battery chargers and home thermostats
■ LVDT position and rotation sensors for industrial control
■ Hall effect sensors for engine speed sensing and door openers
■ Photoelectric infrared detector
■ Photoelectric motion detectors, flame detectors, intrusion alarms
■ Sensing resistor for current detection

Multiple Local Sensors

■ Temperature measurement at multiple points on a Printed Circuit Board (PCB)
■ Sensors that require temperature correction
■ Weather measurements (temperature, pressure, humidity, light)

Capacitive Humidity Sensor Circuit (PIC16F690DM-PCTLHS)

VDD_DIG C1 100 nF U1 PIC16F690 P1 VINT RINT 6.65 MΩ IINT P4 Timer1 P2 VSEN CSEN VCM C CG P3 SR Latch Comparator VREF MCP6291 U2 + VDD 100 nF RCM1 20 kΩ CCM 100 nF RCM2 20 kΩ

Remote Sensing

All sensors in a high noise environment should be considered as remote sensors. Also, sensors not located on the same PCB as the signal conditioning circuitry are remote. Remote sensing applications typically use a differential amplifier or an instrumentation amplifier.

Key Amplifier Features

■ Differential input
Large CMR
Small Vos

Products

■ High Precision

• Low Offset Op Amps

Sensors and Applications

■ High temperature sensors
• Thermocouples for stoves, engines and process control
• RTDs for ovens and process control
Wheatstone Bridges
• Pressure sensors for automotive and industrial control
• Strain gauges for engines
■ Low side current monitors for motors and batteries

Differential Amplifier

VREF EMI EMI MCP6VXX MCP616 VOUT

Thermocouple Circuit Using an INA

graph LR
    A["THJ (Hot Junction)"] --> B["Input Filter"]
    B --> C["INA"]
    C --> D["ADC"]
    D --> E["MCU"]
    F["Temp. Sensor"] --> G["VREF"]
    G --> C
    H["TcJ (Cold Junction)"] --> B
    I["2"] --> D

Weight and Pressure Sensing Applications

Weight and pressure measurement have been among the most popular applications for medical, industrial, automotive and consumer industries. In recent years, the MEMS pressure/accelerometer devices have become widely used in many applications and support our modern life style. The majority of weight scale and pressure measurement circuits use bridge type ratiometric configuration. In this case, the output voltage range from the sensor circuit is proportional to the excitation voltage. The following circuit shows an example weight measurement application. In the figure, the output from the load cell is amplified by the low noise op amplifier and fed to the MCP3421 18-bit delta sigma ADC.

Example of Weight Measurement Circuit Configuration (MCP3421DM-WS)

graph TD
    A["Load Cell"] --> B["Vp excitation"]
    B --> C["1/4 MCP6V02"]
    C --> D["MCP3421"]
    D --> E["PIC² MCU"]
    C --> F["1/4 MCP6V02"]
    F --> G["ADC"]
    G --> H["Sensor Signal Conditioning"]
    style A fill:#f9f,stroke:#333
    style E fill:#bbf,stroke:#333
    style H fill:#dfd,stroke:#333

The following circuit shows an example of pressure measurement using the MCP3551 22-bit Delta-Sigma ADC. In this example, the MCP3551 is directly connected to the NPP-301 sensor output without using the sensor signal conditioning circuit. Since the MCP3551 uses an external reference input, the same supply voltage is used for the ADC reference and VDD, and the sensor excitation. Therefore, the variation in the sensor excitation source is naturally cancelled out.

Example of Pressure Measurement Circuit Configuration using the MCP3551 Device

NPP-301 R1 R2 R3 R4 VREF VDD MCP3551 SCK SDO CS VIN+ VIN- VSS SPI MCU 5, 6, 7 To VDD ΔV ~ [(ΔR2 + ΔR4) - (ΔR1 + ΔR3)]/4R * VDD With R5 = R6 = R3 = R4 = R

DC Voltage and Current Measurement

DC voltage and current measurement can be easily done by using low speed high resolution Delta Sigma ADC such as MCP3421 and MCP3422 family devices. The MCP3421 is a single channel device while the MCP3422 is a dual channel device, which can measure the voltage and current using the same device.

The following circuits show simple example of Battery voltage and current measurement using the MCP3421. The MCP3421 uses internal reference voltage of 2.048V. If the input voltage is greater than the reference, it needs a voltage divider to bring down the input full scale range below the reference voltage. This example is shown in example circuit (a). In the current measurement, the ADC is simply connected across a simple shunt current sensor as shown in the figure. The current is calculated using the measured voltage value and a known shunt's resistance value. The MCP3421 has a differential input and the MSb in the output bit represents the direction of the current.

Voltage Measurement Using MCP3421 Device

(a) If VREF < VBAT (b) If VREF > VBAT VIN = (R2 / R1 + R2) • (VBAT) VMeasured = ADC Output Codes • LSB • (R1 + R2) • 1 / PGA LSB = Reference Voltage / 2^N-1 LSB of 18-bit ADC = Reference Voltage / 2^N-1 = 2.048V / 2^17 = 15.625 μV

Current Measurement Using MCP3421 Device

graph TD
    A["Battery"] --> B["Charging Current"]
    B --> C["Current Sensor"]
    C --> D["To Load"]
    C --> E["Discharging Current"]
    E --> F["MCP3421"]
    F --> G["MCU"]
    G --> H["+ -"]
    H --> I["ADC"]
    I --> J["Charging Current"]

Current = (Measured Voltage)/(Known Resistance Value of Current Sensor) Direction of current is determined by sign bit (Msb bit) of the ADC output code.

Battery Fuel Management by Measuring Battery Voltage and Current

By measuring the battery voltage and current, an intelligent battery fuel management algorithm can be developed. The figure below shows an example of battery fuel management circuit. The MCP3422 measures both voltage and current draws of the battery, and the system tracks how much the battery fuel has been used and remained. The MCU controls the MCP73831 for the recharging of the single cell Li-Ion battery

Example Circuit for Battery Fuel Management by measuring Battery Voltage and Current

graph TD
    A["Battery"] --> B["Ch B"]
    B --> C["R1"]
    C --> D["MCP3422"]
    D --> E["Ch A"]
    E --> F["R2"]
    F --> G["Battery Fuel Measurement"]
    H["Charging Current"] --> I["Decharging Current"]
    I --> J["MCP3422"]
    J --> K["S1"]
    K --> L["Load"]
    L --> M["S2"]
    M --> N["MCP73831"]
    N --> O["MCU"]
    O --> P["R3"]
    P --> Q["MCU"]
    Q --> R["STAT PROG"]
    R --> S["VBAT"]
    style A fill:#f9f,stroke:#333
    style N fill:#ccf,stroke:#333
    style O fill:#cfc,stroke:#333

Voltage and Current Measurement

AC Voltage and Current Measurement

AC voltage and current measurement can be done by using energy metering Delta Sigma ADC such as MCP39XX devices. The Three-Phase Current and Voltage Measurement figure below shows an example of measuring three-phase current using the MCP3911. The measured data is processed by the PIC24F.

Shunt resistors are a common and low cost method for current sensing. Isolated methods include the use of Current transformers and Rogowski coils. The Current Measurement using Rogowski Coil figure shows an example of the current measurement using the Rogowski coil. The Rogowski coil picks-up the electro-magnetic field (EMF) produced by the current at the center. This EMF is measured as voltage. The voltage is integrated so that the output is a voltage that represents the current waveform.

Example of Three-Phase Current and Voltage Measurement Using the MCP3911 Energy Metering Delta-Sigma ADC

graph TD
    A["~AC"] --> B["Load"]
    B --> C["Shunt"]
    C --> D["Current Sampling"]
    C --> E["Voltage Sampling"]
    D --> F["MCP3911"]
    E --> F
    F --> G["GPIO"]
    G --> H["I²CTM"]
    H --> I["LED Driver LCD Panel"]
    I --> J["EEPROM"]
    I --> K["Smart Card Reader"]
    I --> L["Prepayment Card"]
    M["Battery"] --> N["Power Supply"]
    N --> O["Low Voltage Detect"]
    O --> P["ADC 10-bit 16 ch"]
    P --> Q["Flash 128-256 kB"]
    P --> R["RAM 16 kB"]
    Q --> S["UART"]
    R --> T["UART"]
    S --> U["RS485"]
    T --> V["PLC"]
    U --> W["IrDA®"]
    V --> X["RS485"]
    W --> Y["RTCC"]
    X --> Z["32 KHz"]
    Y --> AA["NTC Thermistor"]

Current Measurement Using Rogowski Coil

I(t) B-Field C1 R1 R2 1 VDD VOUT ADC VIN 2

Thermistor Solution

Thermistors are non-linear and require a look up table for compensation. The solution is to use Microchip's Linear Active Thermistors, the MCP9700 and the MCP9701. These are low-cost voltage output temperature sensors that replace almost any Thermistor application solutions. Unlike resistive type sensors such as Thermistors, the signal conditioning at the non-linear region and noise immunity circuit development overhead can be avoided by using the low-cost Linear Active Thermistors. The voltage output pin (VOUT) can be directly connected to the ADC input of a microcontroller. The MCP9700/9700A and MCP9701/9701A temperature coefficients are scaled to provide a 1°C/bit resolution for an 8-bit ADC with a reference voltage of 2.5V and 5V, respectively. The MCP9700 and MCP9701 sensors output can be compensated for improved sensor accuracy as shown below, refer to the AN1001 application note.

MCP9700 and MCP9701 Key Features

■ SC70, T092 packages
■ Operating temperature range: -40^ to +150^
■ Temperature Coeffi cient: 10 mV/°C (MCP9700)
■ Temperature Coeffi cient: 19.5 mV/°C (MCP9701)
■ Low power: 6 μA (typ.)

Applications

■ Refrigeration equipment
■ Power supply over temperature protection
■ General purpose temperature monitoring

Typical Sensor Accuracy Before and After Compensation

Resistive Temperature Detector (RTD) Solutions

RTD Solution with Precision Delta-Sigma ADC

Resistive Temperature Detectors (RTDs) are highly accurate and repeatable temperature sensing elements. When using these sensors a robust instrumentation circuit is required and it is typically used in high performance thermal management applications such as medical instrumentation. Microchip's RTD solution uses a high performance Delta-Sigma Analog to Digital converter, two external resistors, and a reference voltage to measure RTD resistance or temperature ratiometrically. A ±0.1°C accuracy and ±0.01°C measurement resolution can be achieved across the RTD temperature range of -200°C to +800°C with a single point calibration.

This solution uses a common reference voltage to bias the RTD and the ADC which provides a ratio-metric relation between the ADC resolution and the RTD temperature resolution. Only one biasing resistor, R_A , is needed to set the measurement resolution ratio (shown in equation below).

RTD Resistance

$$ R _ {R T D} = R _ {A} \left(\frac {\text { Code }}{2 ^ {n - 1} - \text { Code }}\right) $$

Where:

$$ \text { Code } = \text { ADC output code } $$

$$ R _ {A} = \text { Biasing resistor } $$

$$ n = \text { ADC number of bits } $$

$$ (2 2 \text { bits with sign, MCP3551 }) $$

For instance, a 2V ADC reference voltage (VREF) results in a 1 μV/LSb (Least Significant Bit) resolution. Setting R_A = RB = 6.8 k provides 111.6 μV/°C temperature coefficient (PT100 RTD with 0.385Ω/°C temperature coefficient). This provides 0.008°C/LSb temperature measurement resolution for the entire range of 20Ω to 320Ω or -200°C to +800°C. A single point calibration with a 0.1% 100Ω resistor provides ±0.1°C accuracy as shown in the figure below.

This approach provides a plug-and-play solution with minimum adjustment. However, the system accuracy depends on several factors such as the RTD type, biasing circuit tolerance and stability, error due to power dissipation or self-heat, and RTD non-linear characteristics.

This solution can be evaluated using Microchip's RTD Reference Design Board (TMPSNSRD-RTD2).

RTD Instrumentation Circuit Block Diagram and Output Performance (see Application Note AN1154)

VDD LDO C* C* VLDO VREF RB 5% 1 µF RA 1% PIC® MCU 3 SPI MCP3551 + - RTD

*See LDO Data Sheet at: www.microchip.com/LDO

Resistive Temperature Detector (RTD) Solutions

RTD Solution with RC Oscillators

RC oscillators offer several advantages in precision sensing applications. They do not require an Analog-to-Digital Converter (ADC), and oscillator can be directly connected to an Input/Output pin of a microcontroller to measure change in frequency proportional to sensor output. The accuracy of the frequency measurement is directly related to the quality of the microcontroller's clock signal, and high-frequency oscillators for the controller are available with accuracies of better than 10 ppm.

The oscillator circuits shown in the Oscillator Circuits For Sensors section can be used for this method. The variable resistor of the circuits (Figure: Oscillator Circuits for Resistive Sensors) are replaced with the RTD sensor. There is an example of a state variable RC oscillator, which provides an output frequency that is proportional to the square root of the product of the two RTD resistances ( 1/(R1 × R2)^1/2) . A second example shows the relaxation oscillator (or astable multi-vibrator), which provides a square wave output with a single comparator.

The state variable RC oscillator is good for precision applications, while the relaxation oscillator is an alternative for cost-sensitive applications.

RTD Solution with Instrumentation Amplifier

This Wheatstone bridge reference design board demonstrates the performance of Microchip's MCP6N11 instrumentation amplifier (INA) and a traditional three op amp INA using Microchip's MCP6V26 and MCP6V27 auto-zeroed op amps. The input signal comes from an RTD temperature sensor in a Wheatstone bridge. Real world interference is added to the bridge's output, to provide realistic performance comparisons. Data is gathered and displayed on a PC, for ease of use. The USB PIC® microcontroller and included Graphical User Interface (GUI) provides the means to configure the board and collect sample data.

MCP6N11 and MCP6V2X Wheatstone Bridge Reference Design (ARD00354)

graph TD
    A["PC (Thermal Management Software)"] --> B["PIC18F2550 (USB) Microcontroller"]
    B --> C["PWM"]
    B --> D["12-bit ADC Module"]
    C --> E["PWM Coupling"]
    E --> F["Input Filter"]
    F --> G["INA"]
    G --> H["Output Filter"]
    H --> I["VREF"]
    J["RTD"] --> F
    K["VDD"] --> F
    L["Using USB"] --> B

Thermocouple Sensor Solutions

Thermocouple Solution with Precision Delta-Sigma ADC

Delta-Sigma ADCs can be used to directly measure thermocouple voltage. Microchip's MCP3421 ADC can be used to accurately measure temperature using a Thermocouple. The device provides a plug and play solution for various types of thermocouples, greatly simplifying the circuit design. In this case, the Thermocouple linearization routine is implemented in firmware or software. Cold Junction Compensation is implemented using Microchip's stand alone digital temperature sensors, such as the ±0.5C accurate MCP9808.

This solution can be evaluated using Microchip's Thermocouple Reference Design Board (TMPSNSRD-TCPL1).

Thermocouple Solution with Auto-Zero'ed Op Amp

graph LR
    A["PIC18F2550 USB PIC® Microcontroller"] -->|2| B["MCP3421 18-bit ADC"]
    B --> C["Thermal Pad"]
    C --> D["Thermocouple"]
    B --> E["MCP9804 Temp. Sensor"]
    E -->|2| B

Microchip's auto-zeroed op amp can be used to accurately measure thermocouple voltage. The MCP6V01 op amp ultra low offset voltage and high common mode rejection makes it ideal for low cost thermocouple applications.

The MCP6V01 Thermocouple Auto-Zeroed Reference design demonstrates how to accurately measure temperature (MCP6V01RD-TCPL).

Wireless Temperature Monitoring Solution

graph LR
    A["Heat (Thermocouple)"] --> B["MCP9804 Temp Sensor ±1°C"]
    B --> C["18-bit ΔΣ ADC"]
    C --> D["MCP3421"]
    D --> E["MRF24J40"]
    E --> F["2.4 GHz"]
    D <--> G["PIC® MCU"]
    G <--> H["↔"]
    H <--> I["↔"]
    I <--> J["↔"]

Temperature Sensing Solutions

Temperature Measurements Using 4 Channel ADC (MCP3424) See Thermocouple Reference Design (TMPSNSRD-TCPL1)

graph TD
    A["Thermocouple Sensor"] --> B["MCP9804"]
    B --> C["SCL"]
    C --> D["Isothermal Block (Cold Junction)"]
    D --> E["MCP3424 Delta-Sigma ADC"]
    E --> F["1 CH1+ CH4- 14"]
    E --> G["2 CH1- CH4+ 13"]
    E --> H["3 CH2+ CH3- 12"]
    E --> I["4 CH2- CH3+ 11"]
    E --> J["Vss Adr1 10"]
    E --> K["VDD Adr0 9"]
    E --> L["SDA SCL 8"]
    M["Isothermal Block (Cold Junction)"] --> N["MCP9804"]
    N --> O["SDA"]
    O --> P["SCL"]
    P --> Q["To MCU"]
    Q --> R["5 kΩ"]
    R --> S["VDD"]
    T["Heat"] --> U["MCP9804"]
    U --> V["SCL"]
    V --> W["SDA"]
    W --> X["SCL"]
    X --> Y["To MCU"]
    Y --> Z["VDD"]
    style E fill:#66ccff,stroke:#333
    style N fill:#66ccff,stroke:#333
    style U fill:#ffcccc,stroke:#333

Programmable Amplifier Gain Using a Digital Potentiometer

Many sensors require their signal to be amplified before being converted to a digital representation. This signal gain may be done with and operational amplifier. Since all sensors will have some variation in their operational characteristics, it may be desirable to calibrate the gain of the operational amplifier to ensure an optimal output voltage range.

The figure below shows two inverting amplifier with programmable gain circuits. The generic circuit (a) where R_1 , R_2 , and Pot_1 can be used to tune the gain of the inverting amplifier, and the simplified circuit (b) which removes resistors R_1 and R_2 and just uses the digital potentiometers Raw and Rbw ratio to control the gain.

The simplified circuit reduces the cost and board area but there are trade-offs (for the same resistance and resolution). Using the R_1 and R_2 resistors allows the range of the gain to be limited and therefore each digital potentiometer step is a fine adjust within that range. While in the simplified circuit, the range is not limited and therefore each digital potentiometer step causes a larger variation in the gain.

The following equation shows how to calculate the gain for the simplified circuit (figure below). The gain is the ratio of the digital potentiometers wiper position on the RAB resistor ladder. As the wiper moves away from the midscale value, the gain will either become greater than one (as wiper moves towards Terminal A), or less then one (as wiper moves towards Terminal B).

Inverting Amplifier with Programmable Gain Circuits

Generic Circuit (a) VIN R1 A B W Pot1 R2 CF Op Amp(1) + VOUT Simplified Circuit (b) Input A B W Pot1 CF Op Amp(1) + VOUT

Note 1: A general purpose op amp, such as the MCP6001.

The feedback capacitor (CF) is used for circuit stability.

The device's wiper resistance (Rw) is ignored for first order calculations. This is due to it being in series with the op amp input resistance and the op amp input impedance is very large.

Circuit Gain Equation

$$ V _ {O U T} = - \frac {R _ {B W}}{R _ {A W}} \times V _ {I N} $$

$$ R _ {B W} = \frac {R _ {A B}}{# o f R e s i s t o r s} \times \text { Wiper Code } $$

$$ R _ {A W} = \frac {# \text { of Resistors - Wiper Code }}{# \text { of Resistors }} \times R _ {A B} $$

Programmable Gain Amplifier

The MCP6SX2 PGA Thermistor PICtail Demo Board features the MCP6S22 and MCP6S92 Programmable Gain Amplifiers (PGA). These devices overcome the non-linear response of a NTC thermistor, multiplex between two inputs and provide gain. It demonstrates the possibility of measuring multiple sensors and reducing the number of PIC microcontroller I/O pins used. Two on-board variable resistors allow users to experiment with different designs on the bench.

A complete solution is achieved by interfacing this board to the PICkit™ 1 Flash Starter Kit (see DS40051) and the Signal Analysis PICtail Daughter Board (see DS51476).

MCP6SX2 PGA Thermistor PICtail™ Demo Board (MCP6SX2DM-PICTLTH)

graph TD
    A["Hardware"] --> B["PC"]
    B --> C["PICkit 1 Serial Analysis PC Program"]
    C --> D["PICkit 1 Firmware"]
    D --> E["Signal Analysis PICtail Daughter Board"]
    E --> F["PICA2Dlab.hex Firmware"]
    F --> G["MCP6SX2 PGA Thermistor PICtail Demo Board"]
    G --> H["Thermistor"]
    H --> I["Voltage Divider"]
    I --> J["PGA MCP6S22"]
    J --> K["SP1 Bus"]
    K --> L["ADC"]
    L --> M["Serial EEPROM"]
    M --> N["+5 GND"]
    N --> O["Signal Analysis PICtail Daughter Board"]
    O --> P["SP1™ Bus"]
    P --> Q["+5 GND"]
    Q --> R["Serial EEPROM"]
    R --> S["PIC16F684 ADC"]
    S --> T["+5 GND"]
    T --> U["Signal Analysis PICtail Daughter Board"]
    U --> V["SP1™ Bus"]
    V --> W["+5 GND"]
    W --> X["Signal Analysis PICtail Daughter Board"]
    X --> Y["SP1™ Bus"]
    Y --> Z["+5 GND"]
    Z --> AA["Signal Analysis PICtail Daughter Board"]
    AA --> AB["SP1™ Bus"]
    AB --> AC["+5 GND"]
    AC --> AD["Signal Analysis PICtail Daughter Board"]
    AD --> AE["SP1™ Bus"]
    AE --> AF["+5 GND"]
    AF --> AG["Signal Analysis PICtail Daughter Board"]
    AG --> AH["SP1™ Bus"]
    AH --> AI["+5 GND"]
    AI --> AJ["Signal Analysis PICtail Daughter Board"]
    AJ --> AK["SP1™ Bus"]
    AK --> AL["+5 GND"]
    AL --> AM["Signal Analysis PICtail Daughter Board"]
    AM --> AN["SP1™ Bus"]
    AN --> AO["+5 GND"]
    AO --> AP["Signal Analysis PICtail Daughter Board"]
    AP --> AQ["SP1™ Bus"]
    AQ --> AR["+5 GND"]
    AR --> AS["Signal Analysis PICtail Daughter Board"]
    AS --> AT["SP1™ Bus"]
    AT --> AU["+5 GND"]
    AU --> AV["Signal Analysis PICtail Daughter Board"]
    AV --> AW["SP1™ Bus"]
    AW --> AX["+5 GND"]
    AX --> AY["Signal Analysis PICtail Daughter Board"]
    AY --> AZ["SP1™ Bus"]
    AZ --> BA["+5 GND"]
    BA --> BB["Signal Analysis PICtail Daughter Board"]
    BB --> BC["SP1™ Bus"]
    BC --> BD["+5 GND"]
    BD --> BE["Signal Analysis PICtail Daughter Board"]
    BE --> BF["SP1™ Bus"]
    BF --> BG["+5 GND"]
    BG --> BH["Signal Analysis PICtail Daughter Board"]
    BH --> BI["SP1™ Bus"]
    BI --> BJ["+5 GND"]
    BJ --> BK["Signal Analysis PICtail Daughter Board"]
    BK --> BL["SP1™ Bus"]
    BL --> BM["+5 GND"]
    BM --> BN["Signal Analysis PICtail Daughter Board"]
    BN --> BO["SP1™ Bus"]
    BO --> BP["+5 GND"]
    BP --> BQ["Signal Analysis PICtail Daughter Board"]
    BQ --> BR["SP1™ Bus"]
    BR --> BS["+5 GND"]
    BS --> BT["Signal Analysis PICtail Daughter Board"]
    BT --> BU["SP1™ Bus"]
    BU --> BV["+5 GND"]
    BV --> BW["Signal Analysis PICtail Daughter Board"]

Sensor Characteristics

Sensor characteristics vary, both for device to device as well as for a given device over the operating conditions. To optimize system operation, this sensor variation may require some compensation. This compensation may simply address device to device variation, or be more dynamic to also address the variations of the device over the operating conditions. The system voltage and temperature may effect the sensor output characteristics such as output voltage offset and linearity. This conditioning circuit can also be used to optimize the range of the sensors conditioned signal into the Analog-to-Digital conversion circuit.

graph LR
    A["Sensor"] --> B["Conditioning Circuit\n(Optimizes Sensor's Output)"]
    B --> C["Analog-to-Digital Conversion"]

Depending on the sensor, the sensor's output may either be voltage or a current. A possible compensation circuit for each output type will be discussed.

In this first case, the sensor generates an output voltage. Temperature sensors are typical sensors that generate a voltage output which varies unit to unit.

Voltage Control

A simple voltage control circuit (see figure below) can ensure that the sensors output voltage is optimized to the input range of the next stage in the signal chain. This circuit is a gain amplifier, where the R_1 and R_2 resistances determine the amplifier's gain. The amplifier's output voltage range is limited by the V_DD and V_SS voltages. Controlling the Vos voltage can optimize the VOUT voltage profile, based on the sensor's output voltage ( V_SEN ).

Inverting Amplifier (Voltage Gain)

R2 VDD R1 VSENVIN Op Amp + Vos VDD VOUT

Either a DAC or a Digital Potentiometer can be used to control the voltage at Vos. This device can be a non-volatile version so that at system power up the Vos voltage is at the calibrated voltage, programmed during manufacturing test, to address the sensor's device to device variation. If dynamic control is desired, the DAC or Digital Potentiometer can be interfaced to a microcontroller so that dynamic changes to the Vos voltage compensate for the system conditions and non-linearity of the sensor.

Typically during the manufacturing stage the test system will write this compensation data into some non-volatile memory in the system which the microcontroller will use during normal operation to adjust the Vos voltage.

In this second case, the sensor generates an output current. Photodiodes are a typical sensors that generate a current output, and can vary ±30% at +25^ (unit-to-unit).

Current to Voltage

A simple current to voltage converter circuit (see Figure below), is used to create a voltage on the output of the op amp (V_1) , which can then be compensated. In this circuit, the photodiodes IPD current times the RF resistance equals the voltage at the op amps output (V_1) . The RF resistance needs to be selected so that at the minimum IPD(MAX) current, the VOUT voltage is at the maximum input voltage for the next stage of the signal chain. Typically this will be done when the DAC or Digital Potentiometer is at Full Scale (so VOUT ≈ V1). For photodiodes where the IPD(MAX) current exceeds the minimum IPD(MAX) current (increasing the V1 voltage), the DAC or Digital Potentiometer Wiper code be programmed to attenuate the that V1 voltage to the desired VOUT max voltage. This then compensates for the variation of the photodiode's IPD current.

Photodiode Calibration (Trans-Impedance Amplifier)

CF RF VPD - Op Amp + C(1) IPD V1 RAB A B VOUT CN

This device can be a non-volatile version so that at system power up the voltage attenuation is at the level, programmed during manufacturing test, to address the sensor's device to device variation. If dynamic control is desired, the DAC or Digital Potentiometer can be interfaced to a microcontroller so that dynamic changes to the voltage attenuation compensate for the system conditions and non-linearity of the sensor. Typically during the manufacturing stage the test system will write this compensation data into some non-volatile memory in the system which the microcontroller will use during normal operation to adjust the voltage attenuation.

CF may be used to stabilize the op amp. Additional information on Amplifying High-Impedance Sensors is available in Application Note AN951.

Setting the DC Set Point for Sensor Circuit

A common DAC application is digitally controlling the set point and/or calibration of parameters in a signal chain. The figure below shows controlling the DC set point of a light detector sensor using the MCP4728 12-bit quad DAC device. The DAC provides 4096 output steps. If G = 1 and internal reference voltage options are selected, then the internal 2.048 VREF would produce 500 V of resolution.

If G = 2 is selected, the internal 2.048 VREF would produce 1 mV of resolution. If a smaller output step size is desired, the output range would need to be reduced. So, using gain of 1 is a better choice than using gain of 2 configuration option for smaller step size, but its full-scale range is one half of that of the gain of 2. Using a voltage divider at the DAC output is another method for obtaining a smaller step size.

Setting the DC Set Point

MCP4728 Quad DAC VDD R3 R5 R6 VDD 1 SCL 2 SDA 3 LDAC 4 RDY/BSY 5 To MCU 10 µF 10 VSS 9 VOUT D 8 VOUT C 7 VOUT B 6 VOUT A Analog Outputs Light VDD RSENSE VTRIP1 R1 R2 0.1 µF Comparator 1 + MCP6544(1/4) RSENSE VTRIP2 R1 R2 0.1 µF Comparator 2 + MCP6544(2/4) Light VDD RSENSE VTRIP3 R1 R2 0.1 µF Comparator 3 + MCP6544(3/4) Light VDD RSENSE VTRIP3 R1 R2 0.1 µF Comparator 4 + MCP6544(4/4) VOUT = VREF x Dn / 4096 Gx VTRIP = VOUT x R2 / R1 + R2 Where Dn = Input Code (0 to 4095) Gx = Gain Selection (x1 or x2)

Oscillator Circuits For Sensors

Oscillator Circuits for Sensors

RC oscillators can accurately and quickly measure resistive and capacitive sensors. The oscillator period (or frequency) is measured against a reference clock signal, so no analog-to-digital convertor is needed.

State-Variable Oscillators

State-variable oscillators have reliable start-up, low sensitivity to stray capacitances and multiple output configurations (sine wave or square wave). They can use one or two resistive sensors, and they can use one or two capacitive sensors.

Some of their advantages and features are:

Precision
■ Reliable oscillation startup
■ Sine or square wave output

■ Frequency ∝ 1/(R₁R₂C₁C₂)¹/²

Relaxation Oscillators

Relaxation oscillators have reliable start-up, low cost and square wave output. They can use a resistive sensor or a capacitive sensor.

Some of their advantages and features are:

Low cost
■ Reliable oscillation startup
■ Square wave output

■ Frequency ∝ 1/(R₁C₁)

Sensors and Applications

These oscillator circuits are applicable to various type of sensors.

Resistive Sensors

RTDs
Thermistors
Humidity

Capacitive Sensors

Humidity
■ Pressure (e.g., absolute quartz)
Fluid Level

Related Application Notes:

AN895: Oscillator Circuits for RTD Temperature Sensors AN866: Designing Operational Amplifier Oscillator Circuits for Sensor Applications

Available on the Microchip web site at: www.microchip.com.

Oscillator Circuits for Resistive Sensors

State Variable Oscillator: R1 C1 R2 C2 R3 R7 R8 R4 VOUT VREF U1a U1b U1c U2 MCP6XX4 MCP6XX4 MCP6XX4 MCP6XX4 MCP65X1 U1d U1d MCP6XX4 ... + VREF

Notes: In AN895, R1 = RTDA and R2 = RTDA. A resistive divider to VDD sets VREF (VDD/2 is recommended).

Relaxation Oscillator:

VDD R2 R3 C1 R4 + - U1 MCP65X1 R1 VOUT

Note: In AN895, R1 = RTD.

Oscillator Circuits for Capacitive Sensors

State Variable Oscillator: R1 C1 R2 C2 R3 R7 R8 R4 VREF U1a MCP6XX4 U1b MCP6XX4 U1c MCP6XX4 U2 MCP65X1 VOUT U1d MCP6XX4 VREF

Notes: A resistive divider to V_DD sets V_REF ( V_DD/2 is recommended).

Relaxation Oscillator:

VDD R2 R3 R4 + U1 MCP65X1 C1 R1 VOUT

FilterLab® Software

Microchip's FilterLab software is an innovative software tool that simplifies analog active filter (using op amps) design. Available at no cost from the Microchip website at www.microchip.com/filterlab, the FilterLab design tool provides full schematic diagrams of the filter circuit with component values. It also outputs the filter circuit in SPICE format, which can be used with the macro model to simulate actual filter performance.

SPICE Macro Models

The SPICE macro models for linear ICs (op amps and comparators) are available on the Microchip website at www.microchip.com/spicemodels. The models were written and tested in PSPICE owned by Orcad (Cadence). For other simulators, they may require translation. The models cover a wide aspect of the linear ICs' electrical specifications. Not only do the models cover voltage, current and resistance of the linear ICs, but they also cover the temperature and noise effects on the behavior of the linear ICs. The models have not been verified outside the specification range listed in the linear ICs' datasheet. The models' behavior under these conditions cannot be guaranteed to match the actual linear ICs' performance. Moreover, the models are intended to be an initial design tool. Bench testing is a very important part of any design and cannot be replaced with simulations. Also, simulation results using these macro models need to be validated by comparing them to the datasheet specifications and characteristics curves.

SPICE Macro Model Example

MCP6H01.txt - Notepad File Edit Format View Help SUBCKT MCP6H01 2 3 4 5 Output Negative Supply Positive Supply Inverting Input Non-Inverting Input Software License Agreement The software supplied herewith by Microchip Technology Incorporated (the 'Company') is intended and supplied to you, the Company's customer, for use soley and exclusively on Microchip products. The software is owned by the Company and/or its supplier, and is protected under applicable copyright laws. All rights are reserved. Any use in violation of the foregoing restrictions may subject the user to criminal sanctions under applicable laws, as well as to civil liability for the breach of the terms and conditions of this license. THIS SOFTWARE IS PROVIDED IN AN 'AS IS' CONDITION, NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE, THE SOFTY SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. The following op-amps are covered by this model: MCP6H01, MCP6H02, MCP6H04 Revision History: REV A: 28-Oct-10, Created model REV B: 03-Mar-11, Fixed the output swing issue Recommendations: Use PSPICE (or SPICE 2G6; other simulators may require translation) For a quick, effective design, use a combination of: data sheet specs, bench testing, and simulations with this macromodel For high impedance circuits, set GMIN-100F in the .OPTIONS statement Supported: Typical performance for temperature range (-40 to 125) degrees Celsius DC, AC, Transient, and Noise analyses. Most specs, including: offsets, DC PSRR, DC CMRR, input impedance,

Filter Lab Window

These following development boards support the development of signal chain applications. These product families may have other demonstration and evaluation boards that may also be useful. For more information visit www.microchip.com/analogtools.

Reference Designs

Battery

MCP3421 Battery Fuel Gauge Demo (MCP3421DM-BFG)

The MCP3421 Battery Fuel Gauge Demo Board demonstrates how to measure the battery voltage and discharging current using the MCP3421. The MCU algorithm

calculates the battery fuel being used. This demo board is shipped with 1.5V AAA non-rechargeable battery. The board can also charge a single-cell 4.2V Li-Ion battery.

Pressure

MCP3551 Tiny Application (Pressure) Sensor Demo (MCP355XDM-TAS)

This 1" × 1" board is designed to demonstrate the performance of the MCP3550/1/3 devices in a simple low-cost application. The circuit uses a ratiometric sensor configuration and uses the system power supply as the voltage

reference. The extreme common mode rejection capability of the MCP355X devices, along with their excellent normal mode power supply rejection at 50 and 60 Hz, allows for excellent system performance.

MCP3551 Sensor Application Developer's Board (MCP355XDV-MS1)

The MCP355X Sensor Developer's Board allows for easy system design of high resolution systems such as weigh scale, temperature sensing, or other small signal systems requiring precise signal

conditioning circuits. The reference design includes LCD display firmware that performs all the necessary functions including ADC sampling, USB communication for PC data analysis, LCD display output, zero cancellation, full scale calibration, and units display in gram (g), kilogram (kg) or ADC output units.

Photodiode

MCP6031 Photodiode PICtail Plus Demo Board (MCP6031DM-PTPLS)

The MCP6031 Photodiode PICtail Plus Demo Board demonstrates how to use a trans impedance amplifier, which consists of MCP6031 high precision op amp and external resistors, to convert photo-current to voltage.

Temperature Sensors

Thermocouple Reference Design (TMPSNSRD-TCPL1)

The Thermocouple Reference Design demonstrates how to instrument a Thermocouple and accurately sense temperature over

the entire Thermocouple measurement range. This solution uses the MCP3421 18-bit Analog-to-Digital Converter (ADC) to measure voltage across the Thermocouple.

MCP6V01 Thermocouple Auto-Zero Reference Design (MCP6V01RD-TCPL)

The MCP6V01 Thermocouple Auto-Zeroed Reference Design demonstrates how to use a difference amplifier system to measure electromotive force (EMF)

voltage at the cold junction of thermocouple in order to accurately measure temperature at the hot junction. This can be done by using the MCP6V01 auto-zeroed op amp because of its ultra low offset voltage (Vos) and high common mode rejection ratio (CMRR).

RTD Reference Design Board (TMPSNSRD-RTD2)

The RTD Reference Design demonstrates how to implement Resistive Temperature Detector (RTD) and accurately measure temperature. This solution uses the MCP3551 22-bit Analog-to-Digital

Converter (ADC) to measure voltage across the RTD. The ADC and the RTD are referenced using an onboard reference voltage and the ADC inputs are directly connected to the RTD terminals. This provides a ratio metric temperature measurement. The solution uses a current limiting resistor to bias the RTD. It provides a reliable and accurate RTD instrumentation without the need for extensive circuit compensation and calibration routines.

MCP6N11 and MCP6V2X Wheatstone Bridge Reference Design (ARD00354)

This board demonstrates the performance of Microchip's MCP6N11 instrumentation amplifier (INA) and a traditional three op amp INA using Microchip's MCP6V26 and MCP6V27 auto-zeroed op amps. The input signal comes from an RTD temperature sensor in a Wheatstone bridge.

Demonstration Boards

ADCs

MCP3911 ADC Evaluation Board for 16-bit MCUs (ADM00398)

The MCP3911 ADC Evaluation Board for 16-Bit MCUs system provides the ability to evaluate the performance of the MCP3911 dual-channel ADC. It also provides a development platform for 16-bit PIC-based applications, using existing 100-pin PIM systems compatible with the Explorer-16 and other high pin count PIC demo boards. The system comes with a programmed PIC24FJ256GA110 PIM module that communicates with the included PC software for data exchange and ADC configuration.

MCP3421 Weight Scale Demo Board (MCP3421DM-WS)

The MCP3421 Weight Scale Demo Board is designed to evaluate the performance of the low-power consumption, 18-bit ADC in an electronic weight scale design. Next to the MCP3421 there is a low-noise, auto-zero MCP6V07 op amp. This can be used to investigate the impact of extra gain added before the ADC for performance improvement. The PIC18F4550 is controlling the LCD and the USB communication with the PC. The GUI is used to indicate the performance parameters of the design and for calibration of the weight scale.

MCP3421 Battery Fuel Gage Demo Board (MCP3421DM-BFG)

The MCP3421 Battery Fuel Gauge Demo Board demonstrates how to measure the battery voltage and discharging current using the MCP3421. The MCU algorithm calculates the battery fuel being used. This demo board is shipped with 1.5V AAA non-rechargeable battery. The demo board displays the following parameters:

(a) Measured battery voltage.
(b) Measured battery discharging current.
(c) Battery Fuel Used (calculated).

The MCP3421 Battery Fuel Gauge Demo Board also can charge a single-cell 4.2V

Li-Ion battery. This feature, however, is disabled by firmware since the demo kit is shipped to customer with non-rechargeable 1.5V AAA battery.

DACs

MCP4725 PICtail Plus Daughter Board (MCP4725DM-PTPLS)

This daughter board demonstrates the MCP4725 (12-bit DAC with non-volatile memory) features using the Explorer 16 Development Board and the PICkit Serial Analyzer.

MCP4725 SOT-23-6 Evaluation Board (MCP4725EV)

The MCP4725 SOT-23-6 Evaluation Board is a quick and easy evaluation tool for the MCP4725 12-bit DAC device. It works with Microchip's

popular PICkit Serial Analyzer or independently with the customer's applications board. The PICkit Serial Analyzer is sold separately.

MCP4728 Evaluation Board (MCP4728EV)

The MCP4728 Evaluation Board is a tool for quick and easy evaluation of the MCP4728 4-channel 12-bit DAC device. It contains the MCP4728 device and connection pins for the Microchip's popular PICkit Serial Analyzer. The PICkit Serial Analyzer is sold separately.

Digital Potentiometers

MCP42XX PICtail Plus Daughter Board (MCP42XXDM-TPTLS)

The MCP42XX PICtail Plus Daughter Board is used to demonstrate the operation of the MCP42XX Digital Potentiometers. This board is designed to be used in conjunction

with either the PIC24 Explorer 16 Demo Board or the PICkit Serial Analyzer.

MCP402X Non-Volatile Digital Potentiometer Evaluation Board (MCP402XEV)

The MCP402XEV is a low cost evaluation board that quickly enables the user to exercise all of the features of the MCP402X Non-Volatile Digital Potentiometer. A 6 pin PIC10F206-I/OT with FLASH memory is utilized to generate all of the Low-Voltage (LV) and High-Voltage (HV) MCP402X serial commands when the 2 momentary switches are depressed in various sequences. This enables the user to Increment and Decrement the wiper, save the setting to EEPROM & exercise the WiperLock™ feature.

Op Amps and PGAs

MCP651 Input Offset Evaluation Board (MCP651EV-VOS)

The MCP651 Input Offset Evaluation Board is intended to provide a simple means to measure the MCP651 Input Offset Evaluation Board op amp's input offset voltage under a variety of operating conditions. The measured input offset voltage (VOST includes the input offset voltage specified in the data sheet (Vos) plus changes due to: power supply voltage (PSRR), common mode voltage (CMRR), output voltage (AOL), input offset voltage drift over temperature ( V_os/ TA ) and 1/f noise.

MCP6V01 Input Offset Demo Board (MCP6V01DM-VOS)

The MCP6V01 Input Offset Demo Board is intended to provide a simple means to measure the MCP6V01/2/3 op amps input offset voltage (Vos) under a variety of bias conditions. This Vos includes the specified input offset voltage value

found in the data sheet plus changes due to power supply voltage (PSRR), common mode voltage (CMRR), output voltage (AOL) and temperature (IVos/ITA).

MCP661 Line Driver Demo Board (MCP661DM-LD)

This demo board uses the MCP661 in a very basic application for high speed op amps; a 50Ω line (coax) driver.

The board offers a 30 MHz solution, high speed PCB layout techniques and a means to test AC response, step response and distortion. Both the input and the output are connected to lab equipment with 50Ω BNC cables. There are 50Ω terminating resistors and transmission lines on the board. The op amp is set to a gain of 2V/V to overcome the loss at its output caused by the 50Ω resistor at that point. Connecting lab supplies to the board is simple; there are three surface mount test points provided for this purpose.

Amplifier Evaluation Board 1 (MCP6XXXEV-AMP1)

The MCP6XXX Amplifier Evaluation Board 1 is designed to support inverting/non-inverting amplifiers, voltage followers, inverting/non-inverting comparators, inverting/non-inverting differentiators.

Amplifier Evaluation Board 2 (MCP6XXXEV-AMP2)

The MCP6XXX Amplifier Evaluation Board 2 supports inverting summing amplifiers and non-inverting summing amplifiers.

Amplifier Evaluation Board 3 (MCP6XXXEV-AMP3)

The MCP6XXX Amplifier Evaluation Board 3 is designed to support the difference amplifier circuits which are generated by the Mindi™ Amplifier Designer.

Amplifier Evaluation Board 4 (MCP6XXXEV-AMP4)

The MCP6XXX Amplifier Evaluation Board 4 is designed to support the inverting integrator circuit.

MCP6H04 Evaluation Board Instrumentation Amplifier (ADM00375)

The MCP6H04 Intrumentation Amplifier board is designed to support signal conditioner from sensors example current sensor.

MCP6SX2 PGA Thermistor PICtail Demo Board (MCP6SX2DM-PCTLTH)

The MCP6SX2 PGA Thermistor PICtail Demo Board features the MCP6S22 and MCP6S92 Programmable Gain Amplifiers (PGA). These devices help overcome the non-linear response

of the on-board NTC thermistor. These devices have user selectable inputs which allow the possibilities of temperature correcting another sensor.

MCP6XXX Active Filter Demo (MCP6XXXDM-FLTR)

This kit supports Mindi™ Active Filter Designer & Simulator and active filters designed by FilterLab V2.0. These filters are all pole and are built by cascading first and second order sections.

Humidity Sensor PICtail Demo Board (PIC16F690DM-PCTLHS)

This board uses the MCP6291 and PIC16F690 to measure the capacitance of a relative humidity sensor. The board can also measure small capacitors in different ranges of values using a dual

slope integration method. This board also supports the application note AN1016.

Temperature Sensors

MCP9800 Temp Sensor Demo Board (MCP9800DM-TS1)

The MCP9800 Temperature Sensor Demo Board demonstrates the sensor's features. Users can connect the demo board to a PC with USB interface and evaluate the sensor

performance. The 7-Segment LED displays temperature in degrees Celsius or degrees Fahrenheit; the temperature alert feature can be set by the users using an on board potentiometer. An alert LED is used to indicate an over temperature condition. In addition, temperature can be data logged using the Microchip Thermal Management Software Graphical User Interface (GUI). The sensor registers can also be programmed using the GUI.

MCP6S26 PT100 RTD Evaluation Board (TMPSNS-RTD1)

The PT100 RTD Evaluation Board demonstrates how to bias a Resistive Temperature Detector (RTD) and accurately measure temperature. Up to two RTDs can be connected.

The RTDs are biased using constant current source and the output voltage is scaled using a difference amplifier. In addition to the difference amplifier, a multiple input channel Programmable Gain Amplifier (PGA) MCP6S26 is used to digitally switch between RTDs and increase the scale up to 32 times.

The following literature is available on the Microchip web site: www.microchip.com/appnotes. There are additional application notes that may be useful.

Application Related Documentation

Sensor Conditioning Circuits Overview

AN866: Designing Operational Amplifier Oscillator Circuits For Sensor Applications

Operational amplifier (op amp) oscillators can be used to accurately measure resistive and capacitive sensors. Oscillator design can be simplified by using the procedure discussed in this application note. The derivation of the design equations provides a method to select the passive components and determine the influence of each component on the frequency of oscillation. The procedure will be demonstrated by analyzing two state-variable RC op-amp oscillator circuits.

AN990: Analog Sensor Conditioning Circuits, An Overview

Analog sensors produce a change in an electrical property to indicate a change in its environment. This change in electrical property needs to be conditioned by an analog circuit before conversion to digital. Further processing occurs in the digital domain but is not addressed in this application note.

Delta-Sigma ADCs

AN1156: Battery Fuel Measurement Using Delta-Sigma ADC Devices

This application note reviews the battery fuel measurement using the MCU and ADC devices. Developing battery fuel measurement in this manner provides flexible solutions and enables economic management.

DS21841: Analog-to-Digital Converter Design Guide SAR ADCs

AN246: Driving the Analog Inputs of a SAR A/D Converter

This application note delves into the issues surrounding the SAR converter's input and conversion nuances to insure that the converter is handled properly from the beginning of the design phase.

AN688: Layout Tips for 12-Bit A/D Converter Application

This application note provides basic 12-bit layout guidelines, ending with a review of issues to be aware of. Examples of good layout and bad layout implementations are presented throughout.

AN693: Understanding A/D Converter Performance Specifications

This application note describes the specifications used to quantify the performance of A/D converters and give the reader a better understanding of the significance of those specifications in an application.

AN842: Differential ADC Biasing Techniques, Tips and Tricks

True differential converters can offer many advantages over single-ended input A/D Converters (ADC). In addition to their common mode rejection ability, these converters can also be used to overcome many DC biasing limitations of common signal conditioning circuits.

Utility Metering

DS01008: Utility Metering Solutions

Digital Potentiometers

AN691: Optimizing the Digital Potentiometer in Precision Circuits

In this application note, circuit ideas are presented that use the necessary design techniques to mitigate errors, consequently optimizing the performance of the digital potentiometer.

AN692: Using a Digital Potentiometer to Optimize a Precision Single Supply Photo Detect

This application note shows how the adjustability of the digital potentiometer can be used to an advantage in photosensing circuits.

AN1080: Understanding Digital Potentiometer Resistance Variations

This application note discusses how process, voltage and temperature effect the resistor network's characteristics, specifications and techniques to improve system performance.

AN1316A: Using Digital Potentiometers for Programmable Amplifier Gain

This application note discusses implementations of programmable gain circuits using an op amp and a digital potentiometer. This discussion includes implementation details for the digital potentiometer's resistor network.

Op Amps

AN1302: Current Sensing Circuit Concepts and Fundamentals

This application note provides an overview of current sensing circuit concepts and fundamentals. It introduces current sensing techniques and focuses on three typical high-side current sensing implementations, with their specific advantages and disadvantages.

AN679: Temperature Sensing Technologies

Covers the most popular temperature sensor technologies and helps determine the most appropriate sensor for an application.

AN681: Reading and Using Fast Fourier Transformation (FFT)

Discusses the use of frequency analysis (FFTs), time analysis and DC analysis techniques. It emphasizes Analog-to-Digital converter applications.

AN684: Single Supply Temperature Sensing with Thermocouples

Focuses on thermocouple circuit solutions. It builds from signal conditioning components to complete application circuits.

AN695: Interfacing Pressure Sensors to Microchip's Analog Peripherals

Shows how to condition a Wheatstone bridge sensor using simple circuits. A piezoresistive pressure sensor application is used to illustrate the theory.

AN699: Anti-Aliasing, Analog Filters for Data Acquisition Systems

A tutorial on active analog filters and their most common applications.

AN722: Operational Amplifier Topologies and DC Specifications

Defines op amp DC specifications found in a data sheet. It shows where these specifications are critical in application circuits.

AN723: Operational Amplifier AC Specifications and Applications

Defines op amp AC specifications found in a data sheet. It shows where these specifications are critical in application circuits.

AN866: Designing Operational Amplifier Oscillator Circuits For Sensor Applications

Gives simple design procedures for op amp oscillators. These circuits are used to accurately measure resistive and capacitive sensors.

AN884: Driving Capacitive Loads With Op Amps

Explains why all op amps tend to have problems driving large capacitive loads. A simple, one resistor compensation scheme is given that gives much better performance.

AN951: Amplifying High-Impedance Sensors, Photodiode Example

Shows how to condition the current out of a high-impedance sensor. A photodiode detector illustrates the theory.

AN990: Analog Sensor Conditioning Circuits, An Overview

Gives an overview of the many sensor types, applications and conditioning circuits.

AN1014: Measuring Small Changes in Capacitive Sensors

This application note shows a switched capacitor circuit that uses a PIC microcontroller, and minimal external passive components, to measure small changes in capacitance. The values are very repeatable under constant environmental conditions.

AN1177: Op Amp Precision Design: DC Errors

This application note covers the essential background information and design theory needed to design a precision DC circuit using op amps.

AN1228: Op Amp Precision Design: Random Noise

This application note covers the essential background information and design theory needed to design low noise, precision op amp circuits. The focus is on simple, results oriented methods and approximations useful for circuits with a low-pass response.

AN1258: Op Amp Precision Design: PCB Layout Techniques

This application note covers Printed Circuit Board (PCB) effects encountered in high (DC) precision op amp circuits. It provides techniques for improving the performance, giving more flexibility in solving a given design problem. It demonstrates one important factor necessary to convert a good schematic into a working precision design.

AN1297: Microchip's Op Amp SPICE Macro Models

This application note covers the function and use of Microchip's op amp SPICE macro models. It does not explain how to use the circuit simulator but will give the user a better understanding how the model behaves and tips on convergence issues.

AN1353: Rectifiers, Op Amp Peak Detectors and Clamps

This application note covers a wide range of application, such as half-wave rectifiers, full-wave rectifiers, peak detectors and clamps.

Temperature Sensing

AN929: Temperature Measurement Circuits for Embedded Applications

This application note shows how to select a temperature sensor and conditioning circuit to maximize the measurement accuracy and simplify the interface to the microcontroller.

AN1001: IC Temperature Sensor Accuracy Compensation with a PIC Microcontroller

This application note derives an equation that describes the sensor's typical non-linear characteristics, which can be used to compensate for the sensor's accuracy error over the specified operating temperature range.

AN1154: Precision RTD Instrumentation for Temperature Sensing

Precision RTD (Resistive Temperature Detector) instrumentation is key for high performance thermal management applications. This application note shows how to use a high resolution Delta-Sigma Analog-to-Digital converter, and two resistors to measure RTD resistance ratiometrically. A ±0.1^ C accuracy and ±0.01^ C measurement resolution can be achieved across the RTD temperature range of -200^ C to +800^ C with a single point calibration.

Product Related Documentation

Sensor Conditioning Circuits Overview

AN895: Oscillator Circuits for RTD Temperature Sensors

This application note shows how to design a temperature sensor oscillator circuit using Microchip's low-cost MCP6001 operational amplifier (op amp) and the MCP6541 comparator. Oscillator circuits can be used to provide an accurate temperature measurement with a Resistive Temperature Detector (RTD) sensor. Oscillators provide a frequency output that is proportional to temperature and are easily integrated into a microcontroller system.

Delta-Sigma ADCs

AN1007: Designing with the MCP3551 Delta-Sigma ADC

The MCP3551 delta-sigma ADC is a high-resolution converter. This application note discusses various design techniques to follow when using this device. Typical application circuits are discussed first, followed by a section on noise analysis.

AN1030: Weigh Scale Applications for the MCP3551

This application note focusses specifically on load cells, a type of strain gauge that is typically used for measuring weight. Even more specifically, the focus is on fully active, temperature compensated load cells whose change in differential output voltage with a rated load is 2 mV to 4 mV per volt of excitation (the excitation voltage being the difference between the +Input and the -Input terminals of the load cell).

SAR ADCs

AN845: Communicating With The MCP3221 Using PIC Microcontrollers

This application note will cover communications between the MCP3221 12-bit A/D Converter and a PIC microcontroller. The code supplied with this application note is written as relocatable assembly code.

Passive Keyless Entry (PKE)

TB090: MCP2030 Three-Channel Analog Front-End Device Overview

This tech brief summarizes the technical features of the MCP2030 and describes how the three channel standalone analog front-end device can be used for various bidirectional communication applications.

AN1024: PKE System Design Using the PIC16F639

This application note described how to make hands-free reliable passive keyless entry applications using the PIC16F639, a dual die solution device that includes both MCP2030 and PIC16F636.

Op Amps

AN1016: Detecting Small Capacitive Sensors Using the MCP6291 and PIC16F690 Devices

The circuit discussed here uses an op amp and a microcontroller to implement a dual slope integrator and timer. It gives accurate results, and is appropriate for small capacitive sensors, such as capacitive humidity sensors.

Programmable Gain Amplifier (PGA)

AN248: Interfacing MCP6S2X PGAs to PIC Microcontrollers

This application note shows how to program the six channel MCP6S26 PGA gains, channels and shutdown registers using the PIC16C505 microcontroller.

AN865: Sensing Light with a Programmable Gain Amplifier

This application notes discusses how Microchip's Programmable Gain Amplifiers (PGAs) can be effectively used in position photo sensing applications minus the headaches of amplifier stability.

AN897: Thermistor Temperature Sensing with MCP6SX2 PGAs

Shows how to use a Programmable Gain Amplifier (PGA) to linearize the response of a thermistor, and to achieve a wider temperature measurement range.

Temperature Sensing

AN981: Interfacing a MCP9700 Analog Temperature Sensor to a PIC Microcontroller

Analog output silicon temperature sensors offer an easy-to-use alternative to traditional temperature sensors, such as thermistors. The MCP9700 offers many system-level advantages, including the integration of the temperature sensor and signal-conditioning circuitry on a single chip. Analog output sensors are especially suited for embedded systems due to their linear output. This application note will discuss system integration, firmware implementation and PCB layout techniques for using the MCP9700 in an embedded system.

AN988: Interfacing a MCP9800 I²C Digital Temperature Sensor to a PIC Microcontroller

This application note will discuss system integration, firmware implementation and PCB layout techniques for using the MCP9800 in an embedded system.

AN1306: Thermocouple Circuit Using MCP6V01 and PIC18F2550

This application note shows how to use a difference amplifier system to measure electromotive force (EMF) voltage at the cold junction of thermocouple in order to accurately measure temperature at the hot junction. This can be done by using the MCP6V01 auto-zeroed op amp because of its extremely low input offset volt age (Vos) and very high common mode rejection ratio (CMRR). The microcontroller PIC18F2550 used in this circuit has internal comparator voltage reference (CVREF). This solution minimizes cost by using resources internal to the PIC18F2550 to achieve reasonable resolution without an external ADC.

Device	# per Package	VREF(V)	Typical Propagation Delay (μs)	Io Typical (μA)	Vos Max (mV)	Operating Voltage (V)	Temperature Range (°C)	Features	Packages
MCP6541	1	-	4	1	5	1.6 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	5-pin SOT-23 (S,R,U), 5-pin SC-70 (S,U), 8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP6542	2	-	4	1	5	1.6 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP6543	1	-	4	1	5	1.6 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output, Chip Select	8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP6544	4	-	4	1	5	1.6 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	14-pin PDIP, 14-pin SOIC, 14-pin TSSOP
MCP6546	1	-	4	1	5	1.6 to 5.5	-40 to +125	Open-drain, 9V, Rail-to-Rail Input/Output	5-pin SOT-23 (S,R,U), 5-pin SC-70 (S,U), 8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP6547	2	-	4	1	5	1.6 to 5.5	-40 to +125	Open-drain, 9V, Rail-to-Rail Input/Output	8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP6548	1	-	4	1	5	1.6 to 5.5	-40 to +125	Open-drain, 9V, Rail-to-Rail Input/Output, Chip Select	8-pin PDIP, 8-pin SOIC, 8-pin MSOP
MCP65R41	1	1.21/2.4	4	2.5	10	1.8 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output , Vser	6-SOT-23
MCP65R46	1	1.21/2.4	4	2.5	10	1.8 to 5.5	-40 to +125	Open Drain, Rail-to-Rail Input/Output , Vser 6 SOT-23
MCP6549	4	-	4	1	5	1.6 to 5.5	-40 to +125	Open-drain, 9V, Rail-to-Rail Input/Output	14-pin PDIP, 14-pin SOIC, 14-pin TSSOP
MCP6561	1	-	0.047	100	10	1.8 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	5-pin SOT-23 (S,R,U), 5-pin SC-70 (S)
MCP6562	2	-	0.047	100	10	1.8 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	8-pin SOIC, 8-pin MSOP
MCP6564	4	-	0.047	100	10	1.8 to 5.5	-40 to +125	Push-Pull, Rail-to-Rail Input/Output	14-pin SOIC, 14-pin TSSOP
MCP6566	1	-	0.047	100	10	1.8 to 5.5	-40 to +125	Open-Drain, Rail-to-Rail Input/Output	5-pin SOT-23 (S,R,U), 5-pin SC-70 (S)
MCP6567	2	-	0.047	100	10	1.8 to 5.5	-40 to +125	Open-Drain, Rail-to-Rail Input/Output	8-pin SOIC, 8-pin MSOP
MCP6569	4	-	0.047	100	10	1.8 to 5.5	-40 to +125	Open-Drain, Rail-to-Rail Input/Output	14-pin SOIC, 14-pin TSSOP

S = Standard Pinout, R = Reverse Pinout, U = Alternate Pinout

LINEAR: Programmable Gain Amplifiers (PGA)

Device Channels		-3 dB BW (MHz) Typ.	Iq (μA) Max.	Vos (±μV) Max.	Operating Voltage (V)	Temperature Range (°C)	Features	Packages
MCP6S21/2/6/8	1, 2, 6, 8	2 to 12	1.1	275	2.5 to 5.5	-40 to +85	SPI, 8 Gain Stops, Software Shutdown	PDIP. SOIC, MSOP, TSSOP
MCP6S912/3	1, 2, 2	1 to 18	1.0	4000	2.5 to 5.5	-40 to +125	SPI, 8 Gain Stops, Software Shutdown, Vser	PDIP. SOIC, MSOP

Mixed Signal

MIXED SIGNAL: Delta-Sigma A/D Converters

Device	Resolution (bits)	Max.Sample Rate (samples/sec)	# of Input Channels	Interface	Supply Voltage (V)	Typical Supply Current (μA)	Typical INL (ppm)	Temperature Range (°C)	Features	Packages	Featured Demo Board
MCP3421	18 3.75	1 Diff	I	°C14	2.7 to 5.5	145 (continuous) 39 (one shot)	10	-40 to +85	PGA: 1, 2, 4 or 8Internal voltage reference	SOT-23-6	MCP3421EV
MCP3422	18 3.75	2 Diff	I	°C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	SOIC-8, MSOP-8, DFN-8	MCP3422EV, MCP3421DM-BFG
MCP3423	18 3.75	2 Diff	I	°C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	MSOP-10, DFN-10	MCP3423EV
MCP3424	18 3.75	4 Diff	I	°C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	SOIC-14, TSSOP-14	MCP3424EV
MCP3425	16	15	1 Diff	I2C	2.7 to 5.5	155	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	SOT-23-6	MCP3425EV, MCP3421DM-BFG
MCP3426	16	15	2 Diff	I2C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	SOIC-8, MSOP-8, DFN-8	-
MCP3427	16	15	2 Diff	I2C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	MSOP-10, DFN-10	-
MCP3428	16	15	4 Diff	I2C	2.7 to 5.5	145	10	-40 to +85	PGA: 1, 2, 4, or 8Internal voltage reference	SOIC-14, TSSOP-14	-
MCP3550-50	22	13	1 Diff	SPI	2.7 to 5.5	120	2	-40 to +85	50 Hz noise rejection >120 dB	SOIC-8, MSOP-8	MCP3551DM-PCTL
MCP3550-60	22	15	1 Diff	SPI	2.7 to 5.5	140	2	-40 to +85	60 Hz noise rejection >120 dB	SOIC-8, MSOP-8	MCP3551DM-PCTL
MCP3551	22	14	1 Diff	SPI	2.7 to 5.5	120	2	-40 to +85	Simultaneous 50/60 Hz rejection	SOIC-8, MSOP-8	MCP3551DM-PCTL
MCP3553	20	60	1 Diff	SPI	2.7 to 5.5	140	2	-40 to +85	-	SOIC-8, MSOP-8	MCP3551DM-PCTL
MCP3901	16/24	64000	2 Diff	SPI	4.5 to 5.5	2050	15	-40 to +125	Two ADCs, Programmable Data Rate, PGA, Phase Compensation	SSOP-20, QFN-20	MCP3901EV-MCU16
MCP3903	16/24	64000	6 Diff	SPI	4.5 to 5.5	8300	15	-40 to +125	Six ADCs, Programmable Data Rate, PGA, Phase Compensation	SSOP-28	ADM00310
MCP3911	16/24	64000	2 Diff	SPI	2.7 to 3.6	1700	5	-40 to +125	Two ADCs, Programmable Data Rate, PGA, Phase Compensation	SSOP-20, QFN-20	ADM00398

MIXED SIGNAL: Successive Approximation Register (SAR) A/D Converters

Part #	Resolution (bits)	Max.Sample Rate (samples/sec)	# of Input Channels	Input Type Interface		Input Voltage Range (V)	Max. Supply Current (μA)	Max. INL	Temperature Range (°C)	Packages Featured Demo Board
MCP3001 10	200 1 Single-ended SPI 2.7 to 5.5	500 ±1 LSB -40 to +85								PDIP-8, SOIC-8, MSOP-8, TSSOP-8	-
MCP3002 10	200 2 Single-ended SPI 2.7 to 5.5	650 ±1 LSB -40 to +85								PDIP-8, SOIC-8, MSOP-8, TSSOP-8	-
MCP3004	10	200	4	Single-ended	SPI	2.7 to 5.5	550	±1 LSB	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	-
MCP3008	10	200	8	Single-ended	SPI	2.7 to 5.5	550	±1 LSB	-40 to +85	PDIP-16, SOIC-16	-
MCP3021	10	22	1	Single-ended	I2CTM	2.7 to 5.5	250	±1 LSB	-40 to +125	SOT-23A-5	MCP3221DM-PCTL, MXSIGDM
MCP3221	12	22	1	Single-ended	I2C	2.7 to 5.5	250	±2 LSB	-40 to +125	SOT-23A-5	MCP3221DM-PCTL, MXSIGDM
MCP3201 12	100 1 Single-ended SPI 2.7 to 5.5	400 ±1 LSB -40 to +85								PDIP-8, SOIC-8, MSOP-8, TSSOP-8	DV3201A, DVMCPA, MXSIGDM
MCP3202 12	100 2 Single-ended SPI 2.7 to 5.5	550 ±1 LSB -40 to +85								PDIP-8, SOIC-8, MSOP-8, TSSOP-8	DV3201A, DVMCPA, MXSIGDM
MCP3204	12	100	4	Single-ended	SPI	2.7 to 5.5	400	±1 LSB	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	DV3204A, DVMCPA, MXSIGDM
MCP3208	12	100	8	Single-ended	SPI	2.7 to 5.5	400	±1 LSB	-40 to +85	PDIP-16, SOIC-16	DV3204A, DVMCPA, MXSIGDM
MCP3301 13	100 1 Differential SPI		2.7 to 5.5	450 ±1 LSB -40 to +85						PDIP-8, SOIC-8, MSOP-8, TSSOP-8	DV3201A, DVMCPA, MXSIGDM
MCP3302	13	100	2	Differential	SPI	2.7 to 5.5	450	±1 LSB	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	DV3204A, DVMCPA, MXSIGDM
MCP3304	13	100	4	Differential	SPI	2.7 to 5.5	450	±1 LSB	-40 to +85	PDIP-16, SOIC-16	DV3204A, DVMCPA, MXSIGDM

MIXED SIGNAL: D/A Converters

Part #	Resolution (Bits)	DACs per Package	Interface V	REF	Output Settling Time (μs)	DNL (LSB)	Typical Standby Current (μA)	Typical Operating Current (μA)	Temperature Range (°C)	Packages	Featured Demo Board
MCP47A1	6	1	I^TM	Ext	15	0.05	90	130	-40 to +125	SC-70	-
MCP47DA1 6	1	1	°C	Ext	6	0.025	90	130	-40 to +125	SOT-23-6, SC-70	-
MCP4706	8	1	FC	Vpn, Ext	6	0.05	0.09	210	-40 to +125	SOT-23-6	ADM00317
MCP4716	10	1	PC	Vpn, Ext	6	0.188	0.09	210	-40 to +125	SOT-23-6	ADM00317
MCP4725	12	1	PC	Vpn	6	0.75	1	210	-40 to +125	SOT-23-6	MCP4725DM-PTPLS, MCP4725EV
MCP4726	12	1	PC	Vpn, Ext	6	0.75	0.09	210	-40 to +125	SOT-23-6	MCP4725DM-PTPLS, MCP4725EV, ADM00317
MCP4728	12	4	PC	Int/Vpn	6	0.75	0.04	800	-40 to +125	MSOP-10	MCP4728EV
MCP4801	8	1.2	SPI	Int	4.5	0.5	0.3	330	-40 to +125	PDIP-8, SOIC-8, MSOP-8, 2 x 3 DFN-8	-
MCP4802	8	1.2	SPI	Int	4.5	0.5	0.3	415	-40 to +125	PDIP-8, SOIC-8, MSOP-8, 2 x 3 DFN-8	-
MCP4811	10	1.2	SPI	Int	4.5	0.5	0.3	330	-40 to +125	PDIP-8, SOIC-8, MSOP-8, 2 x 3 DFN-8	-
MCP4812	10	1.2	SPI	Int	4.5	0.5	0.3	415	-40 to +125	PDIP-8, SOIC-8, MSOP-8, 2 x 3 DFN-8	-
MCP4821	12	1	SPI	Y	4.5	1	0.3	330	-40 to +125	PDIP-8, SOIC-8, MSOP-8	-
MCP4822	12	2	SPI	Y	4.5	1	0.3	415	-40 to +125	PDIP-8, SOIC-8, MSOP-8	-
MCP4901	8	1.2	SPI	Ext	4.5	0.5	1	175	-40 to +125	PDIP-8, SOIC-8, MSOP-8, PDIP-14, SOIC-14, TSSOP-14	-
MCP4902	8	1.2	SPI	Ext	4.5	0.5	1	350	-40 to +125	PDIP-8, SOIC-8, MSOP-8, PDIP-14, SOIC-14, TSSOP-14	-
Part #	Resolution (Bits)	DACs per Package	Interface V	REF	Output Settling Time (μs)	DNL (LSB)	Typical Standby Current (μA)	Typical Operating Current (μA)	Temperature Range (°C)	Packages Featured Demo Board
MCP4911 10	1, 2 SPI Ext 4.5	0.5 1 175	-40 to +125							PDIP-8, SOIC-8, MSOP-8, PDIP-14, SOIC-14, TSSOP-14	-
MCP4912 10	1, 2 SPI Ext 4.5	0.5 1 350	-40 to +125							PDIP-8, SOIC-8, MSOP-8, PDIP-14, SOIC-14, TSSOP-14	-
MCP4921	12	1	SPI	Ext	4.5	0.75	1	175	-40 to +125	PDIP-8, SOIC-8, MSOP-8	-
MCP4922	12	2	SPI	Ext	4.5	0.75	1	350	-40 to +125	PDIP-14, SOIC-14, TSSOP-14	-
TC1320 8	1	SMbus/I	°C	Ext	10	±0.8	0.1	350	-40 to +85	SOIC-8, MSOP-8	-
TC1321 10 1	SMbus/I		°C	Ext	10	±2	0.1	350	-40 to -85	SOIC-8, MSOP-8	-

MIXED SIGNAL: Digital Potentiometers

Device	# of Taps	# per Package	Interface	Voo Operating Range ^12	Volatile/ Non-Volatile	Resistance (Ω)	INL (Max.)	DNL (Max.)	Temperature Range (°C)	Packages	Featured Demo Board
MCP4011	64	1	U/D	1.8V to 5.5V	Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOIC-8	MCP402XEV, MCP4XXXDM-DB
MCP4012	64	1	U/D	1.8V to 5.5V	Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-6	MCP402XEV, SC70EV
MCP4013	64	1	U/D	1.8V to 5.5V	Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-6	MCP402XEV, SC70EV
MCP4014	64	1	U/D	1.8V to 5.5V	Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-5	MCP402XEV, SC70EV
MCP4017	128	1	I^TM	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to -125	SC-70-6	SC70EV
MCP4018	128	1 I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	SC-70-6	SC70EV
MCP4019	128	1 I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	SC-70-5	SC70EV
MCP40D17	128	1 I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	SC-70-6	SC70EV
MCP40D18	128	1 I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	SC-70-6	SC70EV
MCP40D19	128	1 I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	SC-70-5	SC70EV
MCP4021	64	1	U/D	2.7V to 5.5V	Non-Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOIC-8	MCP402XEV, MCP4XXXDM-DB
MCP4022	64	1	U/D	2.7V to 5.5V	Non-Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-6	MCP402XEV, SC70EV
MCP4023	64	1	U/D	2.7V to 5.5V	Non-Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-6	MCP402XEV, SC70EV
MCP4024	64	1	U/D	2.7V to 5.5V	Non-Volatile	2.1K, 5K, 10K, 50K	+0.5 LSb	+0.5 LSb	-40 to +125	SOT-23-5	MCP402XEV, SC70EV
MCP41010	256	1	SPI	2.7V to 5.5V	Volatile	10K	+1 LSb	+1 LSb	-40 to +85	PDIP-8, SOIC-8	MCP4XXXDM-DB
MCP41050	256	1	SPI	2.7V to 5.5V	Volatile	50K	+1 LSb	+1 LSb	-40 to +85	PDIP-8, SOIC-8	MCP4XXXDM DB
MCP41100	256	1	SPI	2.7V to 5.5V	Volatile	100K	+1 LSb	+1 LSb	-40 to +85	PDIP-8, SOIC-8	MCP4XXXDM DB
MCP42010	256	2	SPI	2.7V to 5.5V	Volatile	10K	+1 LSb	+1 LSb	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	MCP4XXXDM DB
MCP42050	256	2	SPI	2.7V to 5.5V	Volatile	50K	+1 LSb	+1 LSb	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	MCP4XXXDM DB
MCP42100	256	2	SPI	2.7V to 5.5V	Volatile	100K	+1 LSb	+1 LSb	-40 to +85	PDIP-14, SOIC-14, TSSOP-14	MCP4XXXDM-DB
MCP4131	129	1	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP4132	129	1	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCPI4141	129	1	SPI	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP4142	129	1	SPI	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	+0.5 LSb	+0.25 LSb	-40 to +125	PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS

Note 1: Analog characteristics may be tested at different voltage ranges.

MIXED SIGNAL: Digital Potentiometers (Continued)
Device	# of Taps	# per Package	Interface	Vso Operating Range(1)	Volatile/ Non-Volatile	Resistance (Ω) INL (Max.) DNL (Max.)		Temperature Range (°C)	Packages Featured Demo Board
MCP4151 257	1 SPI 1.8V to	5.5V Volatile	5K, 10K, 50K,	100K ±1 Lsb ±0.5	LSb -40 to +125				PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP4152 257	1 SPI 1.8V to	5.5V Volatile	5K, 10K, 50K,	100K ±1 Lsb ±0.5	LSb -40 to +125				PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP4I61 257	1 SPI 2.7V to	5.5V Non Volatile	5K, 10K,	50K, 100K ±1 Lsb	±0.5 Lsb -40 to +125				PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP4162 257	1 SPI 2.7V to	5.5V Non Volatile	5K, 10K,	50K, 100K ±1 Lsb	±0.5 Lsb -40 to +125				PDIP-8, SOIC-8, MSOP-8, DFN-8	MCP42XXDM-PTPLS
MCP1231 129	2 SPI 1.8V to	5.5V Volatile	5K, 10K, 50K,	100K ±0.5 Lsb ±0.25	LSb -40 to +125				PDIP-14, SOIC-14, TSSOP-14, QFN-16	MCP4XXDM-DB, MCP42XXDM-PTPLS
MCP4232	129	2	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-10, DFN-10	MCP42XXDM-PTPLS
MCP4241 129	2 SPI 2.7V to	5.5V Non Volatile	5K, 10K,	50K, 100K ±0.5	LSb ±0.25 Lsb -40 to +125				PDIP-14, SOIC-14, TSSOP-14, QFN-16	MCP4XXDM-DB, MCP42XXDM-PTPLS
MCP4242	129	2	SPI	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-10, DFN-10	MCP42XXDM-PTPLS
MCP4251 257	2 SPI 1.8V to	5.5V Volatile	5K, 10K, 50K,	100K ±1	LSb ±0.5 Lsb -40 to +125				PDIP-14, SOIC-14, TSSOP-14, QFN-16	MCP4XXDM DB, MCP42XXDM-PTPLS
MCP4252	257	2	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-10, DFN-10	MCP42XXDM-PTPLS
MCP4261 257	2 SPI 2.7V to	5.5V Non Volatile	5K, 10K,	50K, 100K	±1 Lsb ±0.5 Lsb -40 to +125				PDIP-14, SOIC-14, TSSOP-14, QFN-16	MCP4XXDM-DB, MCP42XXDM-PTPLS
MCP4262	257	2	SPI	2.7V to 5.5V	Non Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-10, DFN-10	MCP42XXDM-PTPLS
MCP4351	257	4	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	TSSOP-20, QFN-20	TSSOP-20EV
MCP4352	257	4	SPI	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	TSSOP-14	TSSOP-20EV
MCP4361	257	4	SPI	2.7V to 5.5V	Non Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	TSSOP-20, QFN-20	TSSOP-20EV
MCP4362	257	4	SPI	2.7V to 5.5V	Non Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	TSSOP-14	TSSOP-20EV
MCP4531 129	1 I		CTM	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4532 129	1	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4541 129	1	I	°C	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4542	29	1	PC	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4551 257	1	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4552 257	1	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4561 257	1	I	°C	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4562 257	1	I	°C	2.7V to 5.5V	Non-Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-8, DFN-8	MCP46XXDM-PTPLS
MCP4631 129	2	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	TSSOP-14, QFN-16	MCP4XXDM DB, MCP46XXDM-PTPLS
MCP4632 129	2	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-10, DFN-10	MCP46XXDM-PTPLS
MCP4641 129	2	I	°C	2.7V to 5.5V	Non Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	TSSOP-14, QFN-16	MCP4XXDM-DB, MCP46XXDM-PTPLS
MCP4642 129	2	I	°C	2.7V to 5.5V	Non Volatile	5K, 10K, 50K, 100K	±0.5 Lsb	±0.25 Lsb	-40 to +125	MSOP-10, DFN-10	MCP46XXDM-PTPLS
MCP4651 257	2	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	TSSOP-14, QFN-16	MCP4XXDM-DB, MCP46XXDM-PTPLS
MCP4652 257	2	I	°C	1.8V to 5.5V	Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-10, DFN-10	MCP46XXDM-PTPLS
MCP4661 257	2	I	°C	2.7V to 5.5V Non Volatile	5K, 10K, ±1 Lsb ±0.5 Lsb -40 to +125 TSSOP-14, QFN-16						MCP4XXDM-DB, MCP46XXDM-PTPLS
MCP4662 257	2	I	°C	2.7V to 5.5V Non Volatile	5K, 10K, 50K, 100K	±1 Lsb	±0.5 Lsb	-40 to +125	MSOP-10, DFN-10	MCP46XXDM-PTPLS

TherMal ManageMenT

THERMAL MANAGEMENT: Temperature Sensors
Part #	Typical Accuracy (°C)	Maximum Accuracy @ 25 (°C)	Maximum Temperature Range (°C)	Vcc Range (V)	Maximum Supply Current (μA)	Resolution (bits)	Packages Featured Demo Board
Serial Output Temperature Sensors
MCP9800 ±0.5±1	-55 to +125 2.7 to 5,5 400 9-12 SOT-23-5 MCP9800DM-TS1
MCP9801 ±0.5±1	-55 to +125 2.7 to 5,5 400 9-12 SOIC-8 150 mil, MSOP-8 MCP9800DM-TS1
MCP9802 ±0.5±1	-55 to +125 2.7 to 5,5 400 9-12 SOT-23-5 MCP9800DM-TS1
MCP9803 ±0.5±1	-55 to +125 2.7 to 5,5 400 9-12 SOIC-8 150 mil, MSOP-8 MCP9800DM-TS1
MCP9804	±0.25	±1	-40 to +125	2.7 to 5.5	400	12-bits	MSOP-8, DFN-8	TMPSNSRD-RTD2, TMPSNSRD-TCPL1
MCP9805	+2	±3	-40 to +125	3.0 to 3.6	500	10	TSSOP-8, DFN-8	-
MCP9808	±0.25	±0.5	-40 to +125	2.7 to 5.5	400	12	MSOP-8, DFN-8	-
MCP9843	±0.5	±3	-40 to +125	3.0 to 3.6	500	12	TSSOP-8, DFN-8, TDFN-8
MCP98242	±2	±3	-40 to +125	3.0 to 3.6	500	10	TSSOP-8, DFN-8, TDFN-8, UDFN-8	-
MCP98243	±0.5	±3	-40 to +125	3.0 to 3.6	500	11	TSSOP-8, DFN-8, TDFN-8, UDFN-8	-
TC72	±0.5	±2	-55 to +125	2.7 to 5.5	400	10	MSOP-8, DFN-8	TC72DM-PICTL
TC74	±0.5	±2	-40 to +125	2.7 to 5.5	350	8	SOT-23-5, TO-220-5	TC74DEMO
TC77	±0.5	±1	-55 to +125	2.7 to 5.5	400	12	SOIC-8 150 mil, SOT-23-5	TC77DM-PICTL
TCN75	±0.5	±3	-55 to +125	2.7 to 5.5	1000	9	SOIC-8 150 mil, MSOP-8	-
TCN75A	±0.5 ±3 -40 to +125 2.7 to 5,5 400 9-12 SOIC-8 150 mil, MSOP-8 -
Logic Output Temperature Sensors
MCP9501/2/3/4	±1	±4	-40 to +125	2.7 to 5.5	40	-	SOT-23-5	-
MCP9509	±0.5	NA	-40 to +125	2.7 to 5.5	50	-	SOT-23-5	-
MCP9510	±0.5	NA	-40 to +125	2.7 to 5.5	80	-	SOT-23-6	-
TC620	±1	±3	-55 to +125	4.5 to 18	400	-	PDIP-8, SOIC-8 150 mil	-
TC621	±1	±3	-55 to +125	4.5 to 18	400	-	PDIP-8, SOIC-8 150 mil	-
TC622	±1	±5	-40 to +125	4.5 to 18	600	-	PDIP-8, SOIC-8 150 mil, TO-220-5	-
TC623	±1	±3	-40 to +125	2.7 to 4.5	250	-	PDIP-8, SOIC-8 150 mil	-
TC624	±1	±5	-40 to +125	2.7 to 4.5	300	-	PDIP-8, SOIC-8 150 mil	-
TC6501	±0.5	±4	-55 to 135	2.7 to 5.5	40	-	SOT-23-5	-
TC6502	±0.5	±4	-55 to 135	2.7 to 5.5	40	-	SOT-23-5	-
TC6503	±0.5	±4	-55 to 135	2.7 to 5.5	40	-	SOT-23-5	-
TC6504	±0.5	±4	-55 to 135	2.7 to 5.5	40	-	SOT-23-5	-
Voltage Output Temperature Sensors
MCP9700	±1	±4	-40 to +150	2.3 to 5.5	6	-	SC-70-5, SOT-23-3, TO-92-3	MCP9700DM-PCTL
MCP9700A	±1	±2	-40 to +150	2.3 to 5.5	6	-	SC-70-5, SOT-23-3, TO-92-3	MCP9700DM-PCTL
MCP9701	±1	±4	-40 to +125	3.1 to 5.5	6	-	SC-70-5, SOT-23-3, TO-92-3	MCP9700DM-PCTL
MCP9701A	±1	±2	-40 to +125	3.1 to 5.5	6	-	SC-70-5, SOT-23-3, TO-92-3	MCP9700DM-PCTL
TC1046	±0.5	±2	-40 to +125	2.7 to 4.4	60	-	SOT-23-3	-
TC1047	±0.5	±2	-40 to +125	2.7 to 4.4	60	-	SOT-23-3	TC1047ADM-PICTL
TC1047A	±0.5	±2	-40 to +125	2.5 to 5.5	60	-	SOT-23-3	TC1047ADM-PICTL

Power ManageMenT

POWER MANAGEMENT: Voltage References
Part #	Vcc Range (V) Output Voltage (V)		Max. Load Current (mA)	Initial Accuracy (max.%)	Temperature Coefficient (ppm/°C)	Maximum Supply Current (μA @ 25°C)	Packages
MCP1525	2.7 to 5.5	2.5	± 2	± 1	50	100	SOT-23B-3, TO-92-3
MCP1541	4.3 to 5.5	4.096	± 2	± 1	50	100	SOT-23B-3, TO-92-3

Stand-Alone Analog and Interface Portfolio

Thermal

Management

Temperature

Sensors

Fan Speed

Controllers/

Fan Fault

Detectors

Motor Drivers

Stepper

and DC

3-Phase

Brushless

DC Fan

Controller

Power

Management

LDO & Switching

Regulators

Charge Pump

DC/DC Converters

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Voltage References

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ICs

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Analog and Interface Attributes

Robustness

■ MOSFET Drivers lead the industry in latch-up immunity/stability
■ High performance LIN and CAN transceivers

Low Power/Low Voltage

■ Op Amp family with the lowest power for a given gain bandwidth
■ High efficiency, low start-up (0.65V) boost regulators
■ 450 nA/1.4V/9 kHz bandwidth op amps
■ 1 μA comparators
1.6 μA LDOs
■ Low power ADCs with one-shot conversion

Integration

■ One of the first to market with integrated LDO with Reset and Fan Controller with temperature sensor
■ PGA integrates MUX, resistive ladder, gain switches, high-performance amplifier, SPI interface
Industry's first 12-bit quad DAC with non-volatile EEPROM
■ Delta-Sigma ADCs feature on-board PGA and voltage reference
■ Highly integrated charging solutions for Li-Ion and LiFePO4 batteries
■ Highly integrated dual H-bridge drivers for bi-polar stepper motors or brushed DC motors

Space Savings

■ Resets and LDOs in SC70 package, A/D and D/A converters in SOT-23 package
■ uDFN for height limited applications

Accuracy

■ Low input offset voltages
■ High gains
■ ±0.5°C temperature sensors industry leading energy measurement AFEs with 94.5 dB SINAD

Innovation

■ First stand-alone sensorless, full-wave sinusoidal 3-Phase BLDC Motor Drivers
Industry's first op amp featuring on-demand calibration via mCal technology
■ Digital potentiometers feature WiperLock™ technology to secure EEPROM

For more information, visit the Microchip web site at: www.microchip.com.

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Microchip is committed to supporting its customers in developing products faster and more efficiently. We maintain a worldwide network of field applications engineers and technical support ready to provide product and system assistance. In addition, the following service areas are available at www.microchip.com:

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11/29/11

Microcontrollers • Digital Signal Controllers • Analog • Memory • Wireless

Information subject to change. The Microchip name and logo, the Microchip logo, dsPIC, MPLAB and PIC are registered trademarks and PICDEM, PICtail and mTouch are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. © 2012 Energizer. Energizer and other marks are trademarks owned by Energizer. All other trademarks mentioned herein are property of their respective companies. © 2012, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 9/12 DS21825G

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