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Home ‣ Digital Electronics ‣ Interfacing to the Analog World Comments
  • Question

  • 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.


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    • Interfacing to the Analog World problems

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    • 1. A DAC is monotonic if its output increases as its binary input is incremented from one value to the next.

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

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

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

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    • A. True
    • B. False
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    • 5. 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.

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

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

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    • A. True
    • B. False
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    • 8. If the least significant bit (LSB) of a four-bit binary-weighted resistor D/A converter connects to a 200 Ω resistor, then the resistor needed for the next bit is 100 Ω.

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    • A. True
    • B. False
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    • 9. It is possible to develop more than 16 different analog levels using 4-bit resolution.

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    • A. True
    • B. False
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    • 10. Generally speaking, DACs with a current output will have a shorter settling time than those with voltage outputs.

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    • A. True
    • B. False
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