8.4.12.1 OFSCAL Command

The OFSCAL command performs an offset calibration. Before sending the OFSCAL command sequence (Figure 65), a zero input signal must be applied to the ADS1284 and the inputs allowed to stabilize. When the command sequence (Figure 65) is sent, the ADS1284 averages 16 readings, and then writes this value to the OFC register. The contents of the OFC register can be subsequently read or written. During offset calibration, the full-scale correction is bypassed. Use the OFSCAL command to calibrate the optional 100-mV offset.