The difference between analog voltage represented by two adjacent digital codes of an analog to digital converter is

This question was previously asked in
LPSC ISRO Technical Assistant Electronics 07 Aug 2016 Official Paper
View all ISRO Technical Assistant Papers >
  1. Accuracy
  2. Resolution
  3. Quantization
  4. Precision

Answer (Detailed Solution Below)

Option 2 : Resolution
Free
ISRO Technical Assistant Mechanical Full Mock Test
2.7 K Users
80 Questions 80 Marks 90 Mins

Detailed Solution

Download Solution PDF

Resolution: It is defined as the smallest change in the analog output voltage corresponding to a change of one bit in the digital output.

The percentage resolution (%R) of an n-bit DAC is:

\(\%R = \frac{1}{{{2^n} - 1}} \times 100\)

The resolution of an n-bit DAC with a range of output voltage from 0 to V is given by:

\(R = \frac{V}{{{2^n} - 1}}volts\)

Hence the difference between analog voltage represented by two adjacent digital codes of an analog to digital converter is called resolution.

Hence option (2) is the correct answer.

Important Points

Accuracy:

  • The accuracy of the A/D converter determines how close the actual digital output is to the theoretically expected digital output for given analog input.
  • In other words, the accuracy of the converter determines how many bits in the digital output code represent useful information about the input signal.

% Accuracy of a n bit ADC = (1 / 2) × 100

Latest ISRO Technical Assistant Updates

Last updated on May 30, 2025

-> The ISRO Technical Assistant recruitment 2025 notification has been released at the official website. 

-> Candidates can apply for ISRO recruitment 2025 for Technical Assistant from June 4 to 18.

-> A total of 83 vacancies have been announced for the post of Technical Assistant.

-> The Selection process consists of a written test and a Skill test.

-> Candidates can also practice through ISRO Technical Assistant Electrical Test Series, ISRO Technical Assistant Electronics Test Series, and ISRO Technical Assistant Mechanical Test Series to improve their preparation and increase the chance of selection. 

Get Free Access Now
Hot Links: teen patti online game rummy teen patti teen patti gold downloadable content teen patti stars teen patti joy vip