Offset Calibration

The OPAxOFFSET register can be used to recalibrate or adjust the input offset voltage from the factory calibration. This can be accomplished by using the DAC module or an external constant-voltage source, in conjunction with the ADC module. The OPA input offset voltage can be re-calibrated using the following steps:

Important: The OPA input offset voltage is factory calibrated, and any data written to the OPAxOFFSET register will adjust the input offset voltage from the factory calibrated value. The factory calibrated input offset voltage will be restored on a Reset event, overwriting any previous data that may have been written to the register.