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The full-scale output of a digital to analog converter is 20 mA. If the resolution is 80µA, then the minimum number of bits required and percentage resolution are:
  • a)
    8
  • b)
    7
  • c)
    3.9
  • d)
    0.39
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The full-scale output of a digital to analog converter is 20 mA. If th...
To determine the resolution of a digital-to-analog converter (DAC), we need to know the number of bits used in the DAC.

Resolution can be calculated using the formula:

Resolution = (Full-scale output) / (2^Number of bits)

Given that the full-scale output is 20 mA, and the resolution is 80, we can rearrange the formula to solve for the number of bits:

Number of bits = log2(Full-scale output / Resolution)

Substituting the values, we get:

Number of bits = log2(20 mA / 80)

Number of bits = log2(0.25)

Number of bits = -2

However, the number of bits cannot be negative, so this calculation does not make sense. Please double-check the given values or provide additional information to accurately determine the number of bits used in the DAC.
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Community Answer
The full-scale output of a digital to analog converter is 20 mA. If th...
Concept:
The resolution for n bit DAC is given by:
The % resolution for n bit DAC is given by:
Calculation:
n = 8
% R = 0.39
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The full-scale output of a digital to analog converter is 20 mA. If the resolution is 80µA, then the minimum number of bits required and percentage resolution are:a)8b)7c)3.9d)0.39Correct answer is option 'D'. Can you explain this answer?
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