https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606343#M4803 <HTML><HEAD></HEAD><BODY><P>We are seeing a processor temperature on the TSENS of the MPC5675K that is consistently +10 deg C above the temperature read on the thermal scan. &nbsp;Why is that?</P><P>One point about our design is that the ADC reference voltage is 5 V instead of 3.3.</P><P>We expect a 12-bit resolution, so I'm masking off the most significant 4 bits of the calibration values.</P></BODY></HTML> Fri, 09 Sep 2016 17:24:25 GMT laurayindra 2016-09-09T17:24:25Z https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606343#M4803 <HTML><HEAD></HEAD><BODY><P>We are seeing a processor temperature on the TSENS of the MPC5675K that is consistently +10 deg C above the temperature read on the thermal scan. &nbsp;Why is that?</P><P>One point about our design is that the ADC reference voltage is 5 V instead of 3.3.</P><P>We expect a 12-bit resolution, so I'm masking off the most significant 4 bits of the calibration values.</P></BODY></HTML> Fri, 09 Sep 2016 17:24:25 GMT https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606343#M4803 laurayindra 2016-09-09T17:24:25Z https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606344#M4804 <HTML><HEAD></HEAD><BODY><P>I have just tried it (with MPC5643L but it should be the same) and I can also see mentioned temperature shift in case 5V is used instead of 3.3V. I am investigating details, letting you know then…</P></BODY></HTML> Mon, 12 Sep 2016 14:29:22 GMT https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606344#M4804 davidtosenovjan 2016-09-12T14:29:22Z https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606345#M4805 <HTML><HEAD></HEAD><BODY><P>I have been confirmed that 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.</P></BODY></HTML> Tue, 20 Sep 2016 12:30:29 GMT https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606345#M4805 davidtosenovjan 2016-09-20T12:30:29Z https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606346#M4806 <HTML><HEAD></HEAD><BODY><P>David,</P><P></P><P>I am working with Laura on the&nbsp;<SPAN style="color: #51626f; background-color: #ffffff;">MPC5675K temperature sensor issue. &nbsp;We are consistently seeing the calculated value of the sensor to be +18 to +20 degrees C above the case temperature. &nbsp;This is outside the specified +/-10 C tolerance.</SPAN></P><P><SPAN style="color: #51626f; background-color: #ffffff;">What is the recommended method to account for the 5 vdc reference in the TSENS calculation?</SPAN></P><P></P><P></P></BODY></HTML> Tue, 20 Sep 2016 16:21:44 GMT https://community.nxp.com/t5/MPC5xxx/TSENS-MPC5675K/m-p/606346#M4806 wittkop 2016-09-20T16:21:44Z