Tool/software: Code Composer Studio
My customer is using TMS320F28054. ADCINB4 (op-amp) was used as ADC input channel.
It worked fine When used in normal temperature and high temperature.
But the feedback temperature was still maintained at about 0 degrees when the temperature is below 0 degrees.
What is the reason for this? The program had been verified, no problem, and the sampling circuit had been verified, no problem, it seems to be only related to AD conversion.