The AD7143 is a programmable capacitance touch sensor controller manufactured by Analog Devices, Inc. It has a 25 ms update rate, 1 fF resolution, 8 capacitance sensor input channels, automatic calibration logic, environmental compensation, adaptive threshold and sensitivity levels, and is suitable for personal music and multimedia players, cell phones, digital cameras, smart handheld devices, televisions, and automobiles.
The AD7143 is a programmable controller designed for use in systems requiring novel user input methods via capacitive sensors. It functions as an integrated capacitance-to-digital converter (CDC) featuring an 8-channel switch matrix connected to a high-resolution sigma-delta converter.
Key features include automatic conversion sequencing, on-chip calibration logic to compensate for environmental changes, and adaptive threshold levels. The device supports a C-compatible serial interface with a separate VDRIVE pin for voltage scaling between 1.65 V and 3.6 V.
| Update Rate | 25 ms (maximum) |
|---|---|
| Resolution | 16 Bit |
| CIN Input Range | +/-2 pF |
| Supply Voltage (VCC) | 2.6 V to 3.6 V |
| Operating Temperature Range | -40°C to +150°C |
| Number of Sensor Inputs | 8 channels |
The device is available in a 16-lead, 4 mm x 4 mm LFCSP-VQ package.
No, it does not require external RC tuning components.