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An ADC is an Analog to Digital Converter. This device converts analog signals into digital form. It is mainly used by the digital circuitry to take analog measurements.

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losing resulotion? Yes, this will actually work as desired. But you'll have to be careful because the ADC may be destroyed if it sees an input voltage that's higher than V(AREF), even if it's still far …
answered Jan 15 '15 by JimmyB
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In this case, we need to talk about impedance. The ADC will have specified a certain maximum impedance for its input signal. That number already factors in the S&H capacitor, so in the simple case … ) a C to get to within the allowed impedance range for the frequency of the signal. Hence, the numbers for R and C to use can be figured out from the required impedance of the ADC and the signal's frequency alone. …
answered Nov 18 '16 by JimmyB
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your code you acquire an ADC result, send it out over the USART, and then start the next conversion. You should be able to get the ADC result, start the next conversion, and only then transfer the … data, while the ADC is already processing the next sample at the same time. Or, you may want to look at the "free-running" mode of the ADC where it automatically starts the next conversion as soon as …
answered Jun 27 '13 by JimmyB