The resolution of an 8 bit A/D converter is—

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The resolution of an 8 bit A/D converter is—

1. 0·01%
2. 0·028%
3. 0·024%
4. 0·40%

Correct Option: D

Number of discrete steps or resolution = 2ⁿ–1, where n = number of bits.

% resolution =	1	× 100 =	1	× 100 = 0.39%
	2ⁿ−1		2⁸−1

= 0.40 %
Hence alternative (D) is the correct answer.