A binary-weighted digital-to-analog converter has an input resistor of 100 k?. I

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Question
A binary-weighted digital-to-analog converter has an input resistor of 100 kΩ. If the resistor is connected to a 5 V source, the current through the resistor is:
Options
A. 50 µA
B. 5 mA
C. 500 µA
D. 50 mA

Correct Answer

50 µA

1. A binary-weighted digital-to-analog converter has a feedback resistor, R_f, of 12 kΩ. If 50 µA of current is through the resistor, the voltage out of the circuit is:
Options
A. 0.6 V
B. ?0.6 V
C. 0.1 V
D. ?0.1 V

2. Which of the following is a type of error associated with digital-to-analog converters (DACs)?
Options
A. nonmonotonic error
B. incorrect output codes
C. offset error
D. nonmonotonic and offset error

3. The primary disadvantage of the flash analog-to digital converter (ADC) is that:
Options
A. it requires the input voltage to be applied to the inputs simultaneously
B. a long conversion time is required
C. a large number of output lines is required to simultaneously decode the input voltage
D. a large number of comparators is required to represent a reasonable sized binary number

9. What is the resolution of a digital-to-analog converter (DAC)?
Options
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.

10. What is the major advantage of the R/2R ladder digital-to-analog (DAC), as compared to a binary-weighted digital-to-analog DAC converter?
Options
A. It only uses two different resistor values.
B. It has fewer parts for the same number of inputs.
C. Its operation is much easier to analyze.
D. The virtual ground is eliminated and the circuit is therefore easier to understand and troubleshoot.

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