MCP9983 - Uncategorized Microchip - Free user manual and instructions
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| Product Type | Digital Temperature Sensor |
| Brand | Microchip |
| Model | MCP9983 |
| Interface | SMBus / I2C Compatible |
| Accuracy | ±1°C (max) from -20°C to +100°C |
| Resolution | 11-bit (0.125°C) |
| Supply Voltage | 2.7V to 5.5V |
| Supply Current | 250 µA (typical) during conversion |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 8-lead MSOP / TDFN |
| Number of Channels | 2 (local and remote) |
| Remote Diode Support | Yes, diode-connected transistor |
| Fan Control | Integrated lookup table with PWM output |
| Alert Output | Configurable SMBus alert (ALERT) |
| Shutdown Mode | Yes, reduces current to 1 µA |
| ESD Protection | ±4 kV HBM |
| Compliance | RoHS, lead-free, green |
| Main Functions | Temperature monitoring, fan control, alert generation |
| Cleaning and Maintenance | Wipe with a dry, lint-free cloth; no liquids |
| Safety Precautions | Operate within rated voltage and temperature; avoid static discharge |
| Repairability | Not user-repairable; replace the device if faulty |
Frequently Asked Questions - MCP9983 Microchip
What is the Microchip MCP9983?
The MCP9983 is a digital temperature sensor with an integrated SMBus interface and fan control functionality. It can monitor its own die temperature and one external diode-connected transistor.
How is the MCP9983 connected to a microcontroller?
It uses the SMBus/I2C protocol. Connect the SDA, SCL, VDD, and GND pins. Address pins allow up to four devices on the same bus.
What is the measurement accuracy of the MCP9983?
The device has an accuracy of ±1°C over a range of -20°C to +100°C for both local and remote channels, with a resolution of 0.125°C.
How can I read temperature data from the MCP9983?
Read the temperature registers (e.g., 0x00 for local, 0x01 for remote). The data is 16-bit, with the most significant byte representing the temperature. Convert it according to the data format in the datasheet.
Can the MCP9983 control a fan automatically?
Yes, it has an integrated fan control loop with programmable threshold temperatures and hysteresis. Set the desired temperature limits and PWM duty cycle via the configuration registers.
What power supply does the MCP9983 require?
The operating voltage range is 2.7V to 5.5V, making it suitable for 3.3V and 5V systems. The average supply current is around 250 µA during conversions.
How many temperature channels are available?
The MCP9983 supports two channels: one internal (local) and one external (remote) via a diode-connected transistor.
What precautions should be taken during handling?
Use standard ESD precautions since the device has ±4kV HBM protection. Avoid touching pins without proper grounding.
Is the MCP9983 compliant with environmental regulations?
Yes, it is RoHS compliant and lead-free. It also meets Green packaging standards.
Where can I find more technical documentation?
The full datasheet and application notes are available on Microchip's official website under the part number MCP9983.
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Product information
Brand : Microchip
Model : MCP9983
Category : Uncategorized