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Generating common mode voltage for AD779x

Question asked by PeterTrollens on Sep 17, 2017
Latest reply on Sep 27, 2017 by PeterTrollens



I am asking advice in the following issue.


I want to sample the output of a ADA4530-1 ( TIA configuration ) with an AD7793 ADC.

Since I want to use the internal INA of the AD7793 I need to bias the input to shift it to an

acceptable common mode range.


So far I have used an THS4521 differential amplifier to generate a biased common voltage

signal but I was wondering if there is a better way to accomplish this _without_ the use of an extra opamp.


If a single-to-differential opamp is required, what would be the best choice for a precision, low bandwidth

part from ADI. ( ADA4941-1 ? )


Thank you very much!