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ADS4449: intermittent great offset data- great offset value in high SNR mode

Part Number: ADS4449

Tool/software:

Hi TI team, 

We are experiencing the intermittent toggle data measurement. For example one sample can be -2500(in raw unit), and the next sample is recorded is about 2530. 

Please see the photo below for 1 second recorded data. 

and the photo below shows the data in where the toggle bits happened.

The real data should not look like it. Please note that It happen intermittently, it can happen in short time and disappear and come back randomly. 

We did the pattern test on every boards before deploying it and can confirm that the digital communication is correct. 

Do you have any idea about it?