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Analog and Digital Converters - Technical MCQs

Q1:

The resolution of a 0–5 V 6-bit digital-to-analog converter (DAC) is:

A 63%

B 64%

C 1.56%

D 15.6%

ANS:C - 1.56%

Percentage Resolution = (Step Size/ Full Scale O/P) *100 or (1/2^n-1) *100. It is independent of the Voltage Range.

Here Step Size = 5/2^n-1 = 5/63 = 0. 079.
Percentage Resolution = (0.079/5) *100 = 1.56%.