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AD7768 analog input range in PIN mode

Question asked by johnhepp on Aug 30, 2017
Latest reply on Oct 13, 2017 by johnhepp

I am using AD7768 in PIN mode, I set the DECx and MODEx then apply a /RESET followed by a couple of /START to set the desired sampling rate and power mode (that seems to work OK), AVDDx=5.0V, IOVDD=3.3V, REF+ = 4.096V.  My analog input range is approximately 2Vpp (centered on 2.5V offset), not the expected 8.192Vpp.  I have the EVAL kit and it works as expected.

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