If the minimum output voltage of a 7-bit D/A is 25·4 V,

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If the minimum output voltage of a 7-bit D/A is 25·4 V, what is the smallest change in the output as the binary count increase?

1. 0·2 V
2. 0·5 V
3. 25·9 V
4. 0·1 V

Correct Option: A

The smallest voltage increment =% resolution × maximum value.

=	1	× 25.4
	2⁷−1

= 0.2 V.