What this chip is — capacitance-to-digital converter for proximity and level sensing
The AD7151BRMZ-REEL is a single-channel capacitance-to-digital converter from Analog Devices. It takes a capacitive input (via a voltage input structure) and outputs a digital representation of the measured capacitance. The part draws only 70 µA supply current, making it a fit for battery-powered or loop-powered sensor nodes that need to detect proximity, touch, or fluid level without mechanical contacts. The ROHS3 compliance simplifies export and environmental reporting.
The 70 µA supply current is the headline rating that separates this part from general-purpose ADCs.
Package and mounting — 10-MSOP, surface-mount only
The part is supplied in a 10-MSOP package (3.00 mm body width, 0.118" pitch). It is surface-mount only — no through-hole option.