The full-scale calibration command corrects ADC1 system gain error. To calibrate, apply a positive full-scale dc signal to the ADC, wait until the signal is fully settled, and then send the command. When the SYGCAL1 command is sent, the ADC averages 16 readings to reduce conversion noise for an accurate calibration. When calibration completes, the ADC computes a full-scale calibration where the applied voltage calibrates to a positive full-scale code value. The computed result is written to the 24-bit offset calibration register (FSCAL[2:0]). The precalibrated ADC overrange limitation is 106% FSR.