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looking for appropriate diff op amp for Driving AD9629

Question asked by BRADDIS on Oct 27, 2016
Latest reply on Nov 1, 2016 by harryh

hi all.

DougI

Referenced to this topic below I've decide to use ad9629 to build a 2Channel digital oscilloscope.

choosing adc for digital oscilloscope

I've suggested  this schematic for protection,buffering,scaling and single-ended to differential conversion before.

 

but I've just realized that the supply current of ADA4938 is approximately 40mA which is which is to much(event bigger than ADC's Current) because this current have to supply from USB.

So I've to look for another chip.

do you think AD4930-2 work for me?
can you help me with my schematic?

 

thanks.

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