ATmega328PB

28.7 ADC Conversion Result

After the conversion is complete (ADCSRA.ADIF is set), the conversion result can be found in the ADC Result Registers (ADCL, ADCH).

For single-ended conversion, the result is

ADC = \frac{V_{IN} \cdot 1024}{V_{REF}}

where V_IN is the voltage on the selected input pin, and V_REF the selected voltage reference (see also descriptions of ADMUX.REFSn and ADMUX.MUX). 0x000 represents analog ground, and 0x3FF represents the selected reference voltage minus one LSB.

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