Description: MPR121 - 12 Channel Capacitative Touch Sensor Controller Module Overview: 12-channel I2C touch sensor controller module based on Analog Devices MPR121 capacitive sensing IC. Suitable for various IoT projects requiring capacitive touch input. Key Features: 1. Supports up to 12 independent touch sensors or touch keys, with each channel having adjustable sensitivity and noise filtering. 2. I2C interface enables simple communication with the microcontroller (MCU) for easy integration into various IoT projects. 3. Intelligent touch processing features: self-test, debounce, hysteresis, noise cancelation, and adaptive thresholding. 4. Onboard voltage regulator provides stable power supply to the sensors, reducing design complexity and external components requirements. 5. Compact size (26.6mm x 25.8mm) and low power consumption (approx. 1mA). Usage Scenarios: 1. Home automation: smart switches, touch-controlled lights, and home appliances. 2. Human-Machine Interface (HMI): capacitive
| Specification | Details |
|---|---|
| Module Type | Capacitive Touch Sensor Controller |
| Interface | I2C (SMBus compatible) |
| Channels | 12 Capacitive Touch Sensors |
| Operating Voltage | 1.8V to 5.5V |
| Current Consumption | Typically 35μA (standby) 10mA (active) |
| Temperature Range | -40°C to +85°C |
| Dimensions | 27mm x 18mm x 2mm |
| Weight | Approximately 4g |
| PCB Material | FR-4 with Gold Plating |
| Touch Sensitivity | Adjustable (I2C programmable) |
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