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TSENS Measurements Issue

Question asked by Ahmed Soubky on Dec 20, 2016
Latest reply on Dec 23, 2016 by David Tosenovjan



We are using MPC5744p microcontroller. 


We have requirement which states that "During power up, the two temperature sensors are to be read by
software (TSENS0 from ADC0 channel 15, TSENS1 from ADC1 channel 15). The
software must verify that the conversion values are similar, as this is a means of assessing
that the sensors are working properly."


The sequence described in the example code here along with the reference manual formula has been followed. 

However, the temperatures read from the sensors aren't exactly the same. There is a difference of 2°C on my board and around 8°C on my colleagues board.


Any explanation what is the reason of this and how can we overcome it ?

Thanks in advance,
Best Regards,