Hello Thayne,
We have narrow down the issue to be the memory of the TSW1400. You may notice that the current memory on the TSW1400 is labeled as 2RX16 (dual rank). We have running some tests with 1RX8 memory and it seems to improve the capture accuracy of another ADC. I need to run more tests with the ADS5562 to confirm this.
Would it be possible to ship you an 1RX8 memory for you to try out and to help us with correlating the results? Thanks.
-Kang