For a full-scale voltage of 0-5 V, the resolution of 6 bit ADC is nearest to :

The correct answer is option 1): 78 mV

Concept:

• Analog-to-Digital Converters (ADCs) transform an analog voltage to a binary number (a series of 1’s and 0’s).
• Then eventually a digital number (base 10) for reading on a meter, monitor, or chart.
• The ADC resolution depends upon the number of bits used to represent the digit number
• As the number of bits increases the resolution of an Analog to Digital Converter improves and the quantization error decreases.
• The resolution of DAC is a change in analog voltage corresponding to the LSB bit increment at the input. The resolution (R) is calculated as:

\(R= \frac{{{V_{FS}}}}{{{2^N} - 1}}\)

where

N is the number of bits

VFs is the full scale deflection 

Calculation:

Given

V_FS = 5 V

N = 6

R = \(5 \over 2 ^6 -1\)

= 78 mV