AnsweredAssumed Answered

Offset null with AD8221

Question asked by Jatin on Oct 12, 2013
Latest reply on Oct 23, 2013 by Jatin



I am working on some transducer application and need to measure very low voltage 0~800mV DC to convert it into 0~5VDC. I use AD8221 here with gain of 6.25 to achieve this. AD8221 is supplied with +/- 6VDC.


Problem is, there remains about 2mV offset in DC signal coming from field (0~800mV) and I need to eliminate this offset so that o/p of AD8221 remains 0V and not 12.5mV (2mVX6.25) when there is no signal in actual.


Please anyone advise some cost effective solution to nullify this offset.