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MSP430F449: MSP430F449 ADC sampling value is higher than MSP430F448 using same external circuit

Part Number: MSP430F449
Other Parts Discussed in Thread: MSP430F448

Dears,

In my water meter application, i find same circuit in MSP430F448 and MSP430F449, but MSP430F449 ADC sampling value will higher than MSP430F448.

MSP430F449 will higher 44# than 448 equil to voltage 0.03v.

ADC Register setting as follow fig: