Precision dual sensor op amp features high voltage, low noise, near-zero drift

摘要

Forget about the converter or software for now: A good sensor signal chain starts with a good front-end op amp. The Maxim MAX44251 dual device is the latest op amp to strive for nearly ideal performance, along with the higher supply-rail voltages that industrial-level applications require. It operates from a 2.7 to 27V supply and includes initiaf maximum offset lower than 6 uV, along with a proprietary autocorrelating, autozero calibration approach, which keeps maximum drift lower than 19 nV/℃ over the -40 to +125℃ range. Autozero offset calibration also eliminates the effects of power-supply and even common-mode variations.