wondering if anyone has characterized the ADC's on the gumstix? I am
experiencing a non-linear response... depending on the buffers (on a custom
board) output resistance, the characteristic changes. It seems that until the
ADC value reaches 0.8V with a measured current draw of 0.24mA the ADC will just
measure 0... After that point, it will start to measure linearly. When
driven directly from the power supply the voltage response is linear, but when
diven from an voltage follower, it is not.
help would be much appreciated.
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