AD7143 is a programmable capacitance touch sensor controller. It features high resolution, automatic calibration logic, and adaptive threshold and sensitivity levels.
The AD7143 is a programmable capacitance‑to‑digital converter with eight sensor input channels, on‑chip calibration, and an I²C‑compatible serial interface. It operates from 2.6 V to 3.6 V and offers low‑power operation down to 50 pA.
The document provides a functional block diagram, pin configuration, electrical specifications, timing parameters, absolute maximum ratings, and typical performance curves, as well as ordering information for the 16‑lead LFCSP‑VQ package.
| Supply Voltage Range | 2.6 V to 3.6 V |
|---|---|
| Update Rate | 23‑26 ms |
| Resolution | 16 Bit |
| CIN Input Leakage | 25 nA |
| Low Power Mode Current | 50 pA |
The AD7143 provides eight capacitance sensor input channels.
The I²C‑compatible serial interface operates between 1.65 V and 3.6 V.
In low‑power mode the device consumes as little as 50 pA.
The absolute maximum rating for VCC is +3.6 V.