CAP1203 - Electronic component Microchip - Free user manual and instructions
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| Type of Product | Capacitive Touch Controller IC |
| Number of Channels | 3 |
| Interface | I2C (up to 400 kHz) |
| Supply Voltage | 2.8 V to 5.5 V |
| Package Options | 10-pin MSOP, 3x3 mm DFN |
| Operating Temperature Range | -40°C to +85°C |
| Touch Sensing Method | Self-capacitance with automatic calibration |
| Key Features | Proximity detection, LED drivers, low power |
| Power Consumption (Active) | Typical 350 µA at 3.3 V |
| Power Consumption (Sleep) | Typical 5 µA |
| Output Options | Interrupt (INT) and GPIO |
| ESD Protection | ±8 kV HBM |
| RoHS Compliant | Yes |
| Halogen Free | Yes |
| Typical Applications | Consumer electronics, control panels, proximity switches |
Frequently Asked Questions - CAP1203 Microchip
What is the CAP1203?
The CAP1203 is a 3-channel capacitive touch sensor integrated circuit from Microchip. It detects touch or proximity using self-capacitance.
What is the supply voltage range of the CAP1203?
The CAP1203 operates from 2.8 V to 5.5 V, making it suitable for both 3.3 V and 5 V systems.
How do I communicate with the CAP1203?
Communication is via I2C interface with a slave address configurable by pin strapping. The maximum clock frequency is 400 kHz.
Does the CAP1203 have proximity detection?
Yes, it supports proximity detection up to about 10 cm using a single electrode, with settable threshold.
Can I use the CAP1203 in battery-powered devices?
Yes, the device has a low-power sleep mode (typical 5 µA) and can wake on touch, ideal for portable applications.
How many touch pins can the CAP1203 control?
It has 3 dedicated touch inputs (CS0, CS1, CS2). Each can be configured independently.
What package options are available for the CAP1203?
The CAP1203 is offered in 10-pin MSOP and 3x3 mm DFN packages.
Does the CAP1203 require external components?
Minimal external components are needed: a decoupling capacitor (0.1 µF) near the power pins and optional series resistors for ESD protection.
How do I configure the sensitivity of the CAP1203?
Sensitivity is adjusted via the Sensitivity Control Register (0x1F). Higher values increase sensitivity. Automatic recalibration helps maintain stable operation.
Is the CAP1203 compatible with microcontrollers like Arduino?
Yes, it works with any microcontroller with I2C. Libraries are available; simply connect SDA, SCL, VDD, GND, and optionally the interrupt pin.
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USER MANUAL CAP1203 Microchip
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Product information
Brand : Microchip
Model : CAP1203
Category : Electronic component