+-10ºC Internal Temperature sensor oscillations :(

[Javier1]

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.

 

[Javier1]

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

[Javier1]

@TDK​ Because 15 cycles are the max cubeMx

is allowing me to set

[TDK]

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).

[Javier1]

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