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Output of ADC when no input is suppiled

Hi all,

Sorry if this question's answer is rather obvious, but this is my first time working on a MSP430 and I may be missing something.

I have an external sensory device connected to the ADC12 on the MSP430 and currently my data conversions and all is working fine, but when I disconnect my external sensory device from mine, I still get data conversions coming from the ADC (ADCIFG being triggered) and the values are significant with respect to the data I would get when the external sensory device IS still connected.

Are these values noise? Is there a software/firmware solution to not getting these data or is this a hardware issue of grounding the connector port or am I missing something.

If any details on the code used is needed I can provide it.

Thanks

Jeff Jway


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