If the maximum output voltage of a DAC is V volts and if the resolution is R…
2014
If the maximum output voltage of a DAC is V volts and if the resolution is R bits then the weight of the most significant bit is
- A.
V (2R -1)
- B.
(2R-1).V/(2R-1)
- C.
(2R-1).V
- D.
V(2R-1)
Attempted by 3 students.
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Correct answer: B
The resolution of an R-bit DAC divides the maximum voltage V into 2^R - 1 steps. The weight of the Least Significant Bit (LSB) is V / (2^R - 1). The Most Significant Bit (MSB) has a binary weight of 2^{R-1}. Thus, the MSB weight is 2^{R-1} multiplied by the LSB value: (2^{R-1} * V) / (2^R - 1).
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