AD7143 is a programmable capacitive touch sensor controller with 8 analog input channels, providing 25ms touch update rate, resolution up to 1fF, automatic calibration and environmental compensation, integrated I2C bus interface, power supply voltage of 2.6V to 3.6V.
The AD7143 is an integrated capacitance‑to‑digital converter (CDC) designed for touch‑sensor applications such as buttons, scroll bars, and wheels. It features eight capacitance sensor input channels, an I2C‑compatible serial interface, automatic environmental calibration, and a separate VDRIVE pin for the I2C voltage level.
The device is supplied in a 16‑lead 4 mm × 4 mm LFCSP‑VQ package, operates from 2.6 V to 3.6 V, and consumes less than 1 mA in full‑power mode and as low as 50 µA in low‑power mode. Detailed specifications, pin descriptions, timing diagrams, and PCB guidelines are provided throughout the document.