We would like to be able to calibrate the rRF9E5 ADC
Our proposal is to permanently fit voltage dividers, each using two precision resistors, on two of the ADC Ports and use these to determine corrections to ADC when measuring on the other two ADC ports (and also measuring supply voltage).
We are assuming:
- ADC performance is same for all ADC ports;
- actual measurement varies linearly from true measurement;
- performance may be temperature dependent, so we will probably need to calibrate each time.
Comments / suggestions welcome.
Thanks
Damien