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Q. For the 4-bit D/A converter of Figure with Vref =-5 V, determine the range of analog output voltage and the smallest increment.
Ans.
The binary input range is from 0000 to 1111 for a 4-bit D/A converter. From Equation it follows that the range of the analog output voltage is from 0 V to
5 × (1 + 1 × 2-1 + 1 × 2-2 + 1 × 2-3 ) = 5 × 1.875 = 9.375 V
The smallest increment is given by 5 × 1 × 2-3 = 5/8 = 0.625 V.
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