+-10ºC Internal Temperature sensor oscillations :(

Javier1 · ‎2021-06-21

Hi im using a stm32f205retx (LQFP64)

I am measuring 3 adc imputs + Vref + internal chip temp sensor.

The temp sensor is the only one wildly oscillating.

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Javier1 · ‎2021-06-22

Yup that improved the swing from 10º down to 5º or so

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Javier1 · ‎2021-06-22

@TDK Because 15 cycles are the max cubeMx

is allowing me to set

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TDK · ‎2021-06-22

That is not the sampling time. That is just letting you know how many clock cycles it takes to convert (sampling time + conversion time).

The sampling time can be found in the channel configuration under Rank. The default is 3 cycles (which they should really change to something else).

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Javier1 · ‎2021-06-22

I had them set to 480 cycles ( i forgot about that option) so it looks like is not a clock issue?

maybe its just the junction temp really going up and down due to activity bursts.... as @Community member said

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