Question
1) Are on-chip registers corrupted due to noises to any pins?
2) If the registers are possibly corrupted, is there test data of noisewithstanding?
?? (For example, up to how many noise voltages corruption in the registersdoes not occur.)
Answer
‘Noise’ on the SPi lines that exceeds the abs max ratings can cause ESD diodesto turn on, registers can be corrupted and the ADC may latch up. Power cyclingis the only way to reset the part.
If the ‘noise’ is within the abs max ratings, then it may be seen as extra SCLKcycles as I mentioned in my previous email. Incorrect data is then written toregisters which can cause the ADC to lock up i.e. become asynchronous. Asoftware reset will reset the device to the default state. To make the partmore robust, tie DIN high between write operations. As long as the noise iswithin the abs max ratings, the ADC ignores the noise. I have advised severalcustomers to do this and it really helps a lot.