TSENS MPC5675K

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

TSENS MPC5675K

725 Views
wittkop
Contributor I

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?

Labels (1)
0 Kudos
1 Reply

538 Views
davidtosenovjan
NXP TechSupport
NXP TechSupport

Here I have shared example code based on equations based on current reference manual revision (note it has been updated in rev.10):

https://community.nxp.com/docs/DOC-332735 

There is no difference in measured temperature when switching ADC reference between 5 and 3.3V.

0 Kudos