Referenced to this topic below I've decide to use ad9629 to build a 2Channel 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?