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In-Amp AD8221 Ref. Clarification


Planning to use AD8221 IC as bridge amplifier. Schematic is attached, supply is ±15V, Gain is 495 and ref pin is connected to GND.

Question is,

Since, op-amp is biased with ±15V, operating at high gain (i.e.500) and ref pin connected GND.

Will it affects the output? or Shall we need to tie the Ref pin to a potential?

What is the guaranteed CMRR at low level input (i.e. 1mV, 2mV etc) ?

Thanking you and awaiting expeditious reply.


Dhareppa Z

[locked by: GenevaCooper at 3:27 PM (GMT -4) on 7 Jul 2022]
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