eQADC Calibration on MPC5777C

[berat24]

Hello there,

I am sending gain and offset values to relevant registers for standart configuration. When I looked at the datasheet, offset and gain value registers for standart configuration is common for ADC0 and ADC1. Therefore, I am sending ofset and gain values negating BN bit on write command.

I would like to learn that sending whether these values one time is enough for taking calibrated results from ADC0 and ADC1 on eQADCA.

Sincerely. 

[davidtosenovjan · Accepted solution]

Hi, if you consider voltage reference as clean and perfect during whole temperature drifts, then yes. But it is not too much probable.

Therefore AN2989 section 3.2 outlines run-tine calibration as an option:
https://www.nxp.com/docs/en/application-note/AN2989.pdf