The AD7151 is an ultra-low power, 1-channel, capacitance converter for proximity sensing. It features a fast response time and ultra-low power consumption.
The AD7151 delivers a complete signal‑processing solution for capacitive proximity sensors. It operates from 2.7 V to 3.6 V, consumes only 70 µA, and provides a fast 10 ms conversion time. The part features adaptive environmental compensation, a 2‑wire I²C‑compatible serial interface, and a proximity‑detection output flag.
The datasheet details the device specifications, pin configuration, timing diagrams, and typical performance curves. It also includes application examples for proximity sensing, contact‑less switching, position detection, and level detection, as well as ordering information for the 10‑lead MSOP package.
| Supply Voltage | 2.7 V to 3.6 V |
|---|---|
| Conversion Time | 10 ms |
| Capacitive Input Range | 0 pF to 13 pF |
| Operating Temperature | −40 °C to +85 °C |
| Package | 10‑lead MSOP |
The AD7151 operates from 2.7 V to 3.6 V.
A single conversion is completed in 10 ms.
It is a single‑channel capacitance‑to‑digital converter.
It uses a 2‑wire serial interface that is I²C compatible.