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AD8421,  there's a 10V voltage between +IN and Vout

Question asked by Burgess on Apr 17, 2018
Latest reply on Apr 24, 2018 by Emman.A

The circuit like above,the source is ±12V.  When the power on and no input, there's a 10V voltage between +IN and Vout.  when input a signal, the voltage disappear. and its input impedance is not as large as the datasheet. what's the reason?  I bought 25 chips, they are all same.

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