SLUSE14A December 2020 – February 2021 BQ76942
Several multifunction pins on the BQ76942 device can be used for general purpose ADC input (ADCIN) measurement, if not being used for other purposes. This includes the TS1, TS2, TS3, CFETOFF, DFETOFF, HDQ, DCHG, DDSG, and ALERT pins. When used for ADCIN functionality, the internal bandgap reference is used by the ADC, and the input range of the ADC is limited to the REG18 pin voltage. The digital fullscale range of the ADC is effectively 1.6667 × VREF1, which is approximately 2.08 V during normal operation.
The BQ76942 device also reports the raw ADC counts when a measurement is taken using the TS1 pin. This data can be used during manufacturing to better calibrate the ADCIN functionality.