AnsweredAssumed Answered

Internal Temperature sensor measurement offset

Question asked by Abhishek Sinha on Sep 20, 2019
Latest reply on Sep 27, 2019 by Jing Pan

Hello all,

I have been trying to use the internal temperature sensor for the family Kinetis K26. Though i was able to make it work successfully, yet, the measurement that I get has a huge offset from the actual temperature. I am also using an external temperature sensor, and the results from both of them are utilised. My question is :

 

1. Does calibration play any role in the behaviour that i see? Because the i got the same results with and without the calibration.

2. What could be the actual reason behind this? I know by changing the offset i can get a workaround, but logically speaking, internal temperature sensor monitors the core thus should be at a higher temp compared to external one. 

 

Note: this external temp sensor is on the same board, and that too in close proximity of the processor.

I have attached an image file, showing the behaviour.

 

Thanks in advance.

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