Analog Devices Unveils AD8555 Auto-Zero Amplifier

Analog Devices Inc. (ADI, Wilmington, MA) unveiled the its new AD8555 digitally programmable, signal-conditioning, auto-zero amplifier for strain-bridge and other sensors that are widely used in automotive, medical, industrial and communication applications. Within the new chip, ADI has integrated a full range of amplifier, comparator, resistor, trim-pot and buffer functionality into a tiny 4mm x 4mm SOIC or chip-scale package.

The AD8555 has a 10µV maximum input-offset voltage over-temperature, a 50nV/°C maximum input-offset drift, and a 96dB common-mode rejection, resulting in high dc accuracy. Gain is digitally programmable with high resolution over a wide range from 70 to 1280 through a single-wire interface. Output-offset voltage is digitally programmed and ratio-metric to the supply voltage.

The AD8555 is currently sampling in eight-lead SOIC or 16-lead LFCSP packaging. The device is priced at $2.80 and $2.90, respectively, per unit in 1,000-piece quantities.