 ## How is ADC value calculated?

ADC has a resolution of one part in 4,096, where 212 = 4,096.

Thus, a 12-bit ADC with a maximum input of 10 VDC can resolve the measurement into 10 VDC/4096 = 0.00244 VDC = 2.44 mV.

Similarly, for the same 0 to 10 VDC range, a 16-bit ADC resolution is 10/216 = 10/65,536 = 0.153 mV..

## How is ADC step size calculated?

For an 8-bit ADC, the step size is Vref/256 because it is an 8-bit ADC, and 2 to the power of8 give us 256 steps. For example, if the analog input range needs to be 0 to 4 volts, Vref is connected to 4 volts. That gives 4V/256 = 15.62 mV for the step size of an 8-bit ADC.

An Analog to Digital Converter (ADC) is a very useful feature that converts an analog voltage on a pin to a digital number. … On the Arduino board, these pins have an ‘A’ in front of their label (A0 through A5) to indicate these pins can read analog voltages.

An Analog-Digital Converter (ADC) is a widely used electronic component that converts an analog electric signal (usually a voltage) into a digital representation. The ADCs are at the front-end of any digital circuit that needs to process signals coming from the exterior world.

Channels in an ADC is the number of analog values that can be read at the same time. Its like pins of a port. In a 8 channel ADC you will have 8 Analog input pins.

## What is the output of ADC?

The input signal is usually an analog voltage, and the output is a binary number. The ADC precision is the number of distinguishable ADC inputs (e.g., 4096 alternatives, 12 bits). The ADC range is the maximum and minimum ADC input (e.g., 0 to +3.3V).

ADC Errors. • Offset Error. – Defined as a constant difference, over the whole range of the ADC, between the actual output value and the ideal output value. – Expressed as number of LSBs.

Calibration is performed by feeding two known reference values into two ADC channels and calculating a calibration gain and offset to compensate the input readings from the other channels. … The best possible accuracy achievable is limited by the channel-to-channel gain and offset errors of the ADC.

ADC Code Width. The width of a given output code (code width) is the range of analog input voltages between two adjacent transition points of an Analog-to-Digital Converter (ADC) digital output code.