ATmega8535 provides the ADC with a resolution of 10 bits. ADC is connected to 8 channel Analog Multiplexer which allows formed eight single-ended input voltage is ADC0 to ADC7. Can also be configured into seven differential input channels with ADC1 as the common terminal and the other negative as a positive voltage input. Or a second differential input channels with a choice reinforcement (gain) 10x or 200x, ie ADC1, ADC0 and ADC3, ADC2. the use of ADC atmega8535 ADC has an analog supply voltage pin separate AVCC. AVCC voltage is ± 0.3V of VCC.