we have designed a digitizer board with 3 ADCs. Two of them are pin compatible adcs from another vendor and one is the AD6645ASVZ-80. We have some problems with this AD data converter!
1. Example: Sampling Frequency 40MHz, Input Sine 10k
The source of this bit toggling is the AD6645. I can measure this also with an analog scope. The fpga works correct.
2. I observed different patterns of error codes. It depends on the sampling frequency. Here's another example
Sampling Freq: 80MSPS, 1k Sine
I think this IC is defective. What should i do?