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MSP430AFE253: AD sampling problem.

Expert 2080 points
Part Number: MSP430AFE253


PN:  MSP430AFE253IPW.

In the current template debugging,  One was found to be good and the other was found to be faulty. 

Unable to sample NORMALLY, THAT is, for the same level signal, the sampling result back is changing, and the change is very big.

I replaced three chips and they all had problems,  The fourth chip is good again.

Attached is the human schematic diagram to help check where the instability is caused,

thank you!

SCHEMATIC1 _ P05 MCU.pdf

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