SBAS891B November 2017 – September 2022 ADS7142-Q1
PRODUCTION DATA
The device automatically calibrates the offset on power up. The offset can also be calibrated during normal device operation by setting the TRIG_OFFCAL bit in the OFFSET_CAL register. During offset calibration, the sampling switches are open (Figure 7-1) and the device keep the BUSY/RDY pin high. The device calculates the offset error and corrects for this error for subsequent conversions. To nullify the change in offset resulting from change in temperature or in AVDD voltage, periodically perform this calibration.