AD7147 is a programmable single-electrode capacitance sensor CapTouch controller with femtofarad resolution and 13 capacitance sensor inputs. It features automatic calibration logic and automatic compensation for environmental changes, making it suitable for various applications.
The AD7147 CapTouch programmable controller is a capacitance‑to‑digital converter designed for single‑electrode sensors. It offers 13 sensor inputs, femtofarad resolution, on‑chip automatic calibration, and an active shield to reduce noise, enabling ultrathin PCB implementations.
The handbook includes full electrical specifications, SPI and PC‑compatible timing diagrams, absolute maximum ratings, ESD precautions, and application notes for automotive, mobile phones, multimedia players, and other consumer electronics.
| Supply Voltage (Vcc) | 2.6 V to 3.6 V |
|---|---|
| Update Rate (decimation 64) | 8.73 ms |
| Resolution | 16 Bits |
| Capacitance Sensor Inputs | 13 |
| Low Power Mode Current | ≈26 µA |
| Operating Temperature Range | -40°C to +85°C |
| Maximum Output Load | 150 pF |
The AD7147 operates from 2.6 V to 3.6 V.
The device provides 13 capacitance sensor inputs.
The update rate is 8.73 ms when decimation is set to 64.
Yes, the AD7147 is qualified for automotive applications.