Tool/software:
Hello,
I am trying to validate my understanding of ADC ratiometric measurement for NTC/PTC temperature probe, using the BQ79731-Q1.
The GPIO-ADC provide a 16bits value from the registers GPIOx_HI/GPIOx_LO.
The ADC raw value need to be multiply by the VLSB_GPIO_RATIO in order to get a ratio in %, let's called it RR, which mean that (not considering R2 and Rgpio):
RR = GPIO/TSREF = Rthermistor/(Rthermistor+R1)
Rthermistor = (RR*R1) / (1 - RR)
Is this correct?
Thank you
