STM32H743XIH6 internal temperature sensor calibration vs accuracy

[gustavomendes]

Hi all,

I really hope someone can shed some light on this...

I am trying to find any information regarding the accuracy of the internal temperature sensor of the STM32H7 family, more specifically the STM32H743XIH6.

I understand that each device is factory calibrated to improve the accuracy, however I cannot find what the accuracy actually is, I mean, I cannot find any official source of information, I've seen some saying that it is ±1.5C, but nothing in the ST documentation.

Any help is appreciated.

Thanks

[Andrew Neil]

I think this has been mentioned before - try  a search.

IIRC, the sensor isn't built for accuracy - it's there to look for changes rather than to take absolute measurements...

[gustavomendes]

Hi Andrew,

I understand it's not meant to be accurate.

I searched everywhere and couldn't find anything.

Thanks anyway

[Andrew Neil]

I meant a search of previous forum discussions

[waclawek.jan]

Also note, that it measures temperature of the chip (silicon), which can be vastly different from the plastic case surface and ambient.

JW

[AScha.3]

Hi,

its given in ds ; but need read the TS_CAL + formula in manual:

at 30° : +/- 5° C .

[gustavomendes]

S, do you think this can be interpretated as the accuracy at 30°C? 

[AScha.3]

As this is the only given range for the temperature sensor value - yes.

And don't forget, this is not a sensor for really measuring temperature, it's more to get some information about the actual chip temperature: is it in acceptable range or not. Depending on actual work load, it could go up or down some degrees in seconds, so +/- 5C is okay.