stm32f103ret6 internal temperature sensor range

[Jian Chen]

Posted on January 25, 2017 at 02:01

Hi,

I am using STM32F103RET6 as microcontrller.   In ADC1, there is a internal temperature sensor.  Can this sensor read up to 150C, what is the temperature reading range of this sensor?

Thanks, Jian

#temerature-sensor

[Nesrine M_O]

Posted on January 25, 2017 at 09:35

Hi ,

Please refer to Temperature sensor characteristics in your related datasheet 

-Nesrine-

[Uwe Bonnes]

Posted on January 25, 2017 at 11:03

Hello,

ist there any statistical data available about the spread of the parameters?

Thanks

[Jian Chen]

Posted on January 25, 2017 at 14:28

I am running ADC at max frequency 14MHz ADCCLK and like to know if STM32F103RET6 internal temperature sensor can go to 150C.

[Jian Chen]

Posted on January 25, 2017 at 14:28

I am running ADC at max frequency 14MHz ADCCLK if this is what you ask.

[Nesrine M_O]

Posted on January 25, 2017 at 14:51

Hi ,

According to the Absolute maximum ratings section,Thermal characteristics table  in our related datasheet: Stresses above 150C may cause permanent damage to the device.

The supported temperature range: ?40 to 125C

The internal temperature sensor is more suited to applications that detect temperature variations instead of absolute temperatures. If accurate temperature readings are needed, an external temperature sensor part should be used.

-Nesrine-

[Jian Chen]

Posted on January 25, 2017 at 15:50

Nesrine,

We tested the controller under 150C it is fine. Where did you get temperature sensor temperature range of -40 to 125C? I cannot find it from data sheet.

Jian

[Nesrine M_O]

Posted on January 25, 2017 at 15:59

Hi,

'Where did you get temperature sensor temperature range of -40 to 125C?  I cannot find it from data sheet'.: 

based on Junction temperature range.

'We tested the controller under 150C it is fine.':  Exposure to maximum rating conditions for extended periods may affect device reliability.

-Nesrine-

[Max]

Posted on January 26, 2017 at 04:16

Hello,

From 5.3.1 section of the datasheet:

the STM32F103RET6 (the suffix is 6) is limited to 105C, and so is it's temperature sensor.

Using it at 150C is out of specification.

It may work for a while but will degrade quickly and correct operation is not guarantied. 

BR,

Maxime