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MSP430F249: ADC12 issue.

Part Number: MSP430F249


My program makes extensive use of the ADC12 in this part. The result read from the converter is sometimes 0x1FFF.

1) Is it safe to assume the input has gone slightly negative because of random noise?

2) Is there a document that more throughly discusses the possible outputs from the converter?

3) If I set a signed 16-bit variable to the ADC value and set the variable to 0 when its value is < 0 will the results be consistent?

4) Are there other conditions that can cause the ADC to generate non positive or non-monotonic codes, assuming proper precautions where taken with regards to ground, supply, VREF, etc.?

Thanks, Harvey

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