AnsweredAssumed Answered

AD8221 at 3.3V

Question asked by Kurt on Dec 3, 2012
Latest reply on Dec 10, 2012 by AnnaFeB

Hi everyone, I'm choosing a low noise in-amp for an EEG project. I've found that AD8221 has the best noise characteristics for my set up.

Unfortunately it requires at least +-2.3V, I am running at 3.3V.


I've tested an AD620 which is very similar to the AD8221. It does run at 3.3V just fine. I am not worried about output voltage swing because I am amplifying a very small signal only by 10 times. I would like to know if I will run into any major problems by running this op amp at 3.3V. Specifically I am interested in:


- crashes, instabilities

- signal distortions