AD7151 is an ultra-low power, 1-channel capacitance converter for proximity sensing. It features an ultra-low power converter with fast response time.
The AD7151 from Analog Devices provides a complete signal‑processing solution for capacitive proximity sensors. It operates from 2.7 V to 3.6 V, consumes only 70 pA in standby, and offers a fast 10 ms conversion time. The device includes adaptive environmental compensation and can be used in standalone mode or interfaced to a microcontroller via an I²C‑compatible serial interface.
The datasheet details electrical specifications, timing diagrams, pin functions, and typical performance curves. It also includes design guidelines for handling parasitic capacitance, ESD protection, and power‑supply decoupling, making it suitable for designers of contact‑less switching and proximity‑detection circuits.
| Supply voltage (Vop) | 2.7 V to 3.6 V |
|---|---|
| Operating temperature | -40 °C to +85 °C |
| Conversion time | 10 ms |
| Capacitance input range | 0.5 pF to 4 pF |
| Number of input channels | 1 |
The device operates from 2.7 V to 3.6 V.
The conversion time is 10 ms.
It works from –40 °C up to +85 °C.
It provides a single capacitance input channel.