STM32L162 temperature sensor calibration

nicolas · ‎2013-09-23

Posted on September 23, 2013 at 10:59

Hello,

At what temperature the calibration value TSENSE_CAL1 correspond ?

In the datasheet it say 30�C but in the STM32L1_Discovery_Firmware_Pack_V1.0.3, it use 25�C (STM32L1_Discovery_Firmware_Pack_V1.0.3\Projects\AN3964-Temperature_sensor\src\main.c).

Which one is correct ?

#stm32l162-temperature-sensor-cal

raptorhal2 · ‎2013-09-23

Posted on September 24, 2013 at 04:22

And the datasheet gives a pointer to the chip's sensor voltage at 110 C while the reference manual says 90 C.

ST occasionally monitors these posts, after talking to the design folks they may post a response. Until then I suggest you take a reading at each end of your temperature range of interest using a plastic bag in ice water, warm thumb on the chip and board underneath, or whatever, and interpolate in between.

That will work for a student assignment. For a production run, it may be easier to ADC a board negative temperature coefficient resister network.

Cheers, Hal