Exercise: Analog And Digital Converters

Questions for: Analog And Digital Converters

What is the resolution of a digital-to-analog converter (DAC)?
A:
It is the comparison between the actual output of the converter and its expected output.
B:
It is the deviation between the ideal straight-line output and the actual output of the converter.
C:
It is the smallest analog output change that can occur as a result of an increment in the digital input.
D:
It is its ability to resolve between forward and reverse steps when sequenced over its entire range.
Answer: C
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A binary-weighted digital-to-analog converter has an input resistor of 100 komega.gif. If the resistor is connected to a 5 V source, the current through the resistor is:
A:
50 mu.gifA
B:
5 mA
C:
500 mu.gifA
D:
50 mA
Answer: A
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A 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 0101.
A:
0.3125 V
B:
3.125 V
C:
0.78125 V
D:
–3.125 V
Answer: B
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Which of the following is a type of error associated with digital-to-analog converters (DACs)?
A:
nonmonotonic error
B:
incorrect output codes
C:
offset error
D:
nonmonotonic and offset error
Answer: D
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