AD1671 Power Supply Rejection

Question

Any ideas on how to reduce the gain error caused by the dc supply voltage. All these add together to make a significant error and I would like to reduce or adjust it out. Can this be helped with the external voltage trim at AIN2 (Pin 22)? Any help is appreciated. Thanks

ADIApproved · Accepted Answer

Hi, 
 No, I'm not aware of any way to reduce the gain error vs. the supply voltage, that is an internal error that cannot be addressed at the analog inputs. Just need to keep the supplies as accurate and quiet as possible. 
 Regards, 
 David)

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AD1671 Power Supply Rejection