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Interfacing to the Analog World problems

  • 1. The current across the MSB "rung" of a 4-bit R/2R ladder DAC if the reference voltage is 5 v and R is 8 Ω is 625 µA.

  • Options
  • A. True
  • B. False
    • Discuss
  • 2. A sample-and-hold circuit is used in D/A conversion.

  • Options
  • A. True
  • B. False
    • Discuss
  • 3. When the inputs of a four-bit D/A converter are connected to a binary up-counter, the output looks like an upward sloping line.

  • Options
  • A. True
  • B. False
    • Discuss
  • 4. A data acquisition system may communicate via two common buses: the data bus and the control bus.

  • Options
  • A. True
  • B. False
    • Discuss
  • 5. The output of an analog-to-digital converter is a voltage level.

  • Options
  • A. True
  • B. False
    • Discuss
  • 6. When the analog input to a tracking A/D converter is at a constant level, the digital output will oscillate.

  • Options
  • A. True
  • B. False
    • Discuss
  • 7. A DAC is monotonic if its output increases as its binary input is incremented from one value to the next.

  • Options
  • A. True
  • B. False
    • Discuss
  • 8. To be useful, A/D or D/A converters must have meaningful representation of the analog quantity and a digital representation and the digital quantity as an analog representation.

  • Options
  • A. True
  • B. False
    • Discuss
  • 9. When a DAC output shows a deviation of the measured step size from the ideal step size, this error is called nonlinearity.

  • Options
  • A. True
  • B. False
    • Discuss
  • 10. An eight-bit D/A converter has a resolution of 0.125.

  • Options
  • A. True
  • B. False
    • Discuss

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