This is an ultra low power, 2 channel, capacitance converter for proximity sensing
The AD7150 is a dual-channel capacitance-to-digital converter (CDC) featuring ultra-low power consumption and fast response time. It utilizes adaptive environmental compensation to adjust for variations in sensor capacitance caused by factors such as humidity, temperature, or dielectric material changes over time.
The device operates from a 3.3 V supply with a typical current of 90 µA at -40°C to +85°C and up to 180 µA at higher temperatures. It supports two modes of operation: standalone mode with fixed settings or interfaced to a microcontroller via an I2C-compatible serial interface for user-defined configurations.
| Operating Temperature Range | -40°C to +125°C |
|---|---|
| Response Time | 10 ms |
| Input Leakage Current (SCL) | +0.1 to +1 pA |
The resolution is 2.0 fF when operating in the 4 pF input range.
The device operates from -40°C to +125°C.
It consumes 90 µA of current.