Internal temperatur sensor

pa · ‎2013-05-16

Posted on May 16, 2013 at 16:10

Hi all

I've some troubles with the internal temperatur sensor from my stm32f051: If I read the adc_channel16 I get ~1920 as value.

Then I calculate the result in this way

�C = ((V25 - VSENSE) / Avg_Slope) + 25 = ((1.43V - 1.54V) / 4.3mV/�C) + 25 = -0.58�C

But this should be ~22�C.

Then I thought, that I could use the factory callibration data. But HOW?

If I read the stored value like this ''(*((uint32_t*)0x1FFFF7B8))'' I get 100206271 as ''

TS ADC raw data acquired at temperature of 30 �C, V

DDA

= 3.3 V

''.

So can anyone help me? Or should I use an external SPI temperature sensor for only measuring with an accuracy of ~1�C?

Thank you very mutch and best regards

#adc-bandgap #stm32f205-temperature

peter23 · ‎2013-05-30

Posted on May 30, 2013 at 09:17

Hi!

Regarding these TS_CAL1 and 2 values, are they applicable for the STM32F103 device?

Cannot find any references in the manuals or guides. I get the feeling that these values are not available with this device. But maybe there is another solution to get more accurate values of the temperature.

Regards Peter