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Question asked by Tom Wittkop on Sep 22, 2016
Latest reply on Sep 22, 2016 by David Tosenovjan

I am working with Laura on the MPC5675K temperature sensor issue.  We are consistently seeing the calculated value of the sensor to be +18 to +20 degrees C above the case temperature.  This is outside the specified +/-10 C tolerance.


Your answer stated "the ADC reference does not affect accuracy of temperature sensor.   Even though it is a bit different it should be still in specified tolerance +/-10°C. Note that this sensor is relatively imprecise".


Does this imply the ratio of the 5 V ref vs. a 3.3 V ref should not be used in the calculation?


What is the recommended method to account for the 5 vdc reference in the TSENS calculation?