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From: Michael Plante on 24 Oct 2009 01:03
>I haven't had a chance to read any of the references posted here, so
>this may have been described, but one easy way to change the
>resolution of an ADC is to use a successive approximation type
>converter and only digitize as many bits as you need. The converter
>has to be designed to handle the max number of bits you require. You
>improve both speed and power by converting fewer bits. Of course this
>is not as fast or power efficient as a converter designed for fewer
>bit since the comparison operation can go faster and use a lower power
>comparator if you design it for less resolution.

Some ADCs will let you set the full scale to be between two external
references, rather than GND to AVDD. It all depends on what is really
wanted.

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