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how noise affect adc accuracy?

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nimnorm

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my 12 bits adc with 3 lsb noise ... is 9 bits accuracy?
 

nimnorm said:
my 12 bits adc with 3 lsb noise ... is 9 bits accuracy?
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To clarify: you are using a 12 bit a/d converter but the three least significant bits are "bouncing around," and so you are asking whether the a/d accuracy is only 9 bits as a result of the noise.

Is this correct?
 

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    nimnorm

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yes ... should I say accuracy is 9 bits or 12 bits?
 

nimnorm, sometimes noise can be used to increase adc resolution and accuracy for case when noise spectre is higher than desired signal to digitize.
 

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