Our customer asked as following questions.
He cannot find the condition on your datasheet.
What is the condition of set/reset for DVALID bit status register?
What is the condition of set/reset for OVR bit status register?
Customer found the following troubles.
DVALID bit of status register AD7762 is reseted and the data cannot use.
OVR bit of status register AD7762 is set.
Sometimes DVALID bit is reset when OVR bit is reset.
6Vp-p,3kHz,pulse signal/50% duty High/Low
Input at pin-25,pin-26 via internal diff AMP.
Using internal diff AMP as page-16 on your datasheet