2025-05-02 1:00 PM
Hi,
In the STM32H753 reference manual revision 7 ADC section 25.4.8 page 932, there is a statement about ADC calibration:
Anyone know what the extended period is that I should worry about?
Thanks!
2025-05-03 3:17 AM
Hi,
no need to worry. :)
The calibration data will stay there , until you power off the ADC.
BUT...on chip temperature, voltage etc. will/might change , so after some time, anyway, restart calibration is good idea.
Just think: you have a machine, running 24/7 ; after start (cold chip) calibrate - and then never again, even for years ?
No, if you want best precision, re-calibrate always, lets say: once every hour. (Its just some microseconds..)
Or to know, what will drift or not, in detail, test it :
- run calibrate (with cold chip) at start, then after 2 hours running program, check conversion precision;
then re-calibrate, check conversion precision again, and compare results.
Then you know, should run re-calibration or not needed.