Instrumentation amp combines power efficiency, zero-drift accuracy, and value

摘要

The AD8237 micro-power, zero-drift precision instrumentation amplifier is claimed to offer a power-efficient solution for precision sig­nal and sensor conditioning at a competitive price. The amplifier features a low input offset drift of less than 0.3 pV/℃ and an input signal range that extends 300 mV beyond the supply rails. Additional features include a maximum gain error of 0.005%, a drift of 0.5 ppm/℃, an input voltage noise of 1.5 uVp-p, and CMRR of 114 dB. With a low quiescent supply current of just over 100 μA, the amplifier is well suited for signal conditioning bridge, temperature and other similar sensors used in lowpower designs. Housed in an MSOP8 package, the part operates off a single supply voltage of 1.8 to 5.5 V.