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AD8222 Question

Hi,

I'm under testing AD8222.

Is there anybody point out what should I do to fix abnormal output?

My expectation on OUT1/2 is 2.2V

Test Condition :

Vs+ = 5V, Vs- = 0V

REF=2.2V

Input : Floating

Test Result :

OUT1 = 4.1V

OUT1 = 0.6V