What is the temperature range of the NUCLEO-L4R5ZI ?

[aralnworb]

Will it operate from 0deg C to 50 deg C?

[T J]

is that ambient ?

You would expect it to work to 60, but the processor itself should be held down under 75C and so may require heatsink...

the higher temperature alters the propagation delays within the internal bus routing networks.

what frequency are you running, ?

if you lower the frequency and the issue goes away... its a heat issue

did you read out the processor die temperature ?

[aralnworb]

​Thanks for your quick response.

Yes, I did mean ambient. We are in the design stages of a project, and just got a late requirement to operate in the 0-50 degC range, and wanted to make sure the nucleo could handle it. According to the STM32-L4R5ZI datasheet the MCU can handle it, but I was concerned about the rest of the nucleo, as there was nothing related to temperature in the Nucleo databrief or user manual that I could find.

[T J]

0-50c should be easy,

but you could readout the processor temp ( ambient + 25 roughly depending on clock's configuration, etc.)

and heat it up till it fails...

then you will know the operating temp range with your code running.

the rest of the circuit has been through an oven above 200C, no issue there..

electrolytic caps don't like being hot for a long time. degrading to 50% within a short period.

[aralnworb]

​Good suggestion.

And thanks for the feedback, this is very helpful.