AD7148 is a programmable single-electrode capacitance sensor controller with nanometer resolution and eight capacitance sensor inputs.
The AD7148 is a programmable touch controller designed for single‑electrode capacitance sensors such as buttons, scroll bars, and wheels. It integrates a 16‑bit CDC, on‑chip environmental calibration, automatic adaptive thresholds, and an I²C‑compatible serial interface with a separate voltage level pin.
The device is offered in a 16‑lead 4 mm × 4 mm LFCSP, operates from 2.6 V to 3.6 V, and consumes as little as 26 µA in low‑power mode. The manual provides full specifications, pin descriptions, timing diagrams, and ordering information for designers.
| Supply voltage (VEE) | 2.6 V to 3.6 V |
|---|---|
| Update rate | 24.25 – 25.75 ms |
| Resolution | 16 bits |
| Capacitance sensor input range | +8 pF |
| Operating temperature range | ‑40 °C to +85 °C |
| Low‑power mode current consumption | ≈ 26 µA |
The AD7148 operates from 2.6 V to 3.6 V.
The device provides eight capacitance sensor inputs.
Yes, it includes an I²C‑compatible serial interface and an interrupt output.
Typical low‑power mode current consumption is about 26 µA.