My customer has some problem of their module with AD7734.
Their module is operating normally, and some modules are supplied to their customer.
Their module can receive 4 channels (AIN0,AIN1,AIN2,AIN3) inputs for AD7734, but their cusrtomer use AIN0 only.
Some times their module operates normally, after then the output of channel 0 (AIN0) is max. values.
(It seems to be saturated.)
Q1) Do you have any experience above issue?
And then they test other modules and confirm some strange things.
After applying a impulse noise signal with over 1 kV to AIN0-3 , they can get the outputs of AIN0 & AIN1 are max. values and AIN2 and AIN3 are normal.
So they want to review their schematic of AD7734.
Q2) Would you confirm their schematic?
Q3) About applying a impulse noise signal with over 1 kV to AIN0-3, how bout your opinions?
Please advise me.
If you have any questions, please let me know.