The problem I am seeing is that I have two of the same board, each with an ADS8363 on it. One board provides a digital output that is ~13 dB higher than the other with the same input signal applied to the ADC input. I cannot understand how this can happen. The part is used with a grounded SDI input and M1=M2=0 so that all registers should be defaulted. I cannot find anything physical on the boards that could cause the parts to behave differently so I am looking for advice on how to troubleshoot this. Is there an internal mode that would cause the serial digital output to have decoded output that is ~13 dB higher? I currently do not have access to read the internal registers, but could with some effort.
Case CS0134878 was original correspondence with TI.