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dc-coupled ADC driver

Question asked by xzsawq21 on Aug 25, 2017
Latest reply on Aug 30, 2017 by xzsawq21

Hello

I want to use ADA4930 as an ADC driver in dc-coupled and single ended topology.

the gain is 0.5V/V and the source is 2Vpp and 50 Ohm.  (Rf=301 Rg=294 Rt=56.9)

but the source has a little output offset. (some mV maximum)

I've studied in the Analog devices's application notes that I should apply some equal DC voltage at the inputs of the FDA.

I can not measure the output offset very accurate.

how should I provide this voltage and apply it at the second input of the FDA?!!!

please reply me as fast as you can. I don't have enough time.

 

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