We have designed an analog front end circuit consisting of four LTC6373 differential PGAs driving the four differential inputs of an AD4134. This is performing very well.
However, we have not included any ADC overvoltage protection (e.g., clamping diodes). FYI, the LTC6373 is powered from +-15V.
Should we include protection? Is there a reference design for protecting fully differential ADC circuits?
Clarified PGA supply voltage
[edited by: squirest at 1:13 PM (GMT -4) on 12 Mar 2023]