Tool/software: Code Composer Studio
I am seeing an issue with the MSP430F2274 when the part is running at elevated temperatures. During a BIT cycle, the ADC values read extreme values if the part is a hot environment. During room temperatures, the values are within expected ranges of voltages. When the part itself is heated to 70+C, the same ADC values jump to rail values.
This is not on all ICs, but replacing the IC fixes the issue on certain DUTs. I have tried to change code and slow down the reading of the ADC registers, but it is very repeatable on a chip by chip basis.
As the temp is elevated to 90C, more ICs seem to fail. Once a "good" chip is identified, it always works and never has an issue at high temps.
Very weird since the IC is rated for 125C operation, but the ADC inside seems to have an issue with reading consistent values.