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

LeoChen

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:

over 4 years ago

0 James Evans over 4 years ago

TI__Mastermind 49692 points

Hello,

Have you confirmed that this difference between devices falls within the ADC offset given in the 12-bit ADC Linearity Parameters table on page 54 of the datasheet? To achieve the same values, you'll need to account for this offset error. You can learn more about this in the following video training series.

3.2 Understanding and Calibrating the Offset and Gain for ADC Systems

Regards,

James

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