Hi All,
I have a question regarding comparator offset in Pipeline ADC. What is the maximum offset u can tolerate with and without digital error correction?
Books I have read say +-Vref/4 with error correction. Suppose my input is 1V differential signal, does that mean max offset tolerable is +-0.125V( since Vref =0.5V and Vref/4=0.125V). Thanks for the help.
I think that it depends on the number of bits you resolve in each stage of the pipeline. Vref/4 would apply to about 2 bits per stage, if I am not wrong. Also, the residue gain is also critical in defining the required offset.