vivkr
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Hi Roland,
Perhaps a silly question, but how did you simulate the T/H? Was it with the same sort of signal (high-speed sine)? Also, do you have any ESD diodes etc. at the inputs which you may need to consider?
I would also check if the layout of the pipelined ADC is well-made (symmetrical) although I think you have already checked that. Normally, the tracking switches should be the only source of such nonlinearity, but it may depend a bit on your T/H architecture.
What scheme do you use? Could you post a simple picture showing the switching arrangement?
Regards,
Vivek
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