On the ADuC7060, could you tell me the fastest ADC sampling rate that gives best 50/60Hz rejection?
Do you have any further details on the SINC3 filter especially settling time calculation?
For best 50/60Hz rejection, the ADC sampling rate should be set to 50Hz with chop off. (ADCFLT = 0xFF)
For simultaneous 50/60Hz noise rejection, the NOTCH2 bit in the ADCFLT register should be set.
To help you calculate the settling time for different sampling rates, use the attached spreadsheet. This spreadsheet should be very helpful in understanding the performance of the SINC3 filter.
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