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1. #ANALOG TO DIGITAL CONVERTER DEFINITION HOW TO#
2. #ANALOG TO DIGITAL CONVERTER DEFINITION SERIAL#
3. #ANALOG TO DIGITAL CONVERTER DEFINITION SOFTWARE#

The analog input channel and differential gain are selected by writing to the MUX bits in ADMUX. The internal voltage reference may thus be decoupled by an external capacitor at the AREF pin to improve noise immunity. Optionally, AVCC or an internal 2.56 V reference voltage may be connected to the AREF pin by writing to the REFSn bits in the ADMUX register. The minimum value represents GND and the maximum value represents the voltage on the AREF pin minus 1 LSB. The ADC converts an analog input voltage to a 10-bit digital value through successive approximation. The voltage reference may be externally decoupled at the AREF pin by a capacitor for better noise performance. Internal reference voltages of nominally 2.56 V or AV CC are provided on-chip.

#ANALOG TO DIGITAL CONVERTER DEFINITION HOW TO#

See the paragraph “ADC Noise Canceler” on page 227 on how to AVCC must not differ more than ☐.3 V from V CC. The ADC has a separate analog supply voltage pin, AVCC. A block diagram of the ADC is shown in Figure 107. The ADC contains a Sample and Hold circuit which ensures that the input voltage to theĪDC is held at a constant level during conversion. If 200x gain is used, 7-bit resolution can be expected. If 1x or 10x gain is used, 8-bit resolution can be expected. Seven differential analog input channels share a common negative terminal (ADC1), while any other ADC input can be selected as the positive input terminal. Two of the differential inputs (ADC1, ADC0 and ADC3, ADC2) are equipped with a programmable gain stage, providing amplification steps of 0 dB (1x), 20 dB (10x), or 46 dB (200x) on the differential input voltage before the A/D conversion. The device also supports 16 differential voltage input combinations. The single-ended voltage inputs refer to 0 V (GND). The ADC is connected to an 8-channel Analog Multiplexer which allows 8 single-ended voltage inputs constructed from the pins of Port F. The ATmega128 features a 10-bit successive approximation ADC.

#ANALOG TO DIGITAL CONVERTER DEFINITION SERIAL#

#ANALOG TO DIGITAL CONVERTER DEFINITION SOFTWARE#

16-bit Timer/Counter (Timer/Counter1 and Timer/Counter3).8-bit Timer/Counter0 with PWM and Asynchronous Operation.Timed Sequences for Changing the Configuration of the Watch Dog Timer.Using all 64KB Locations of External Memory.