AD/DA conversion

Which correctly describes the integral nonlinearity (INL) of an AD converter?

  1. AThe output deviation when the input is 0
  2. BHow much the spacing between adjacent codes deviates from 1 LSB
  3. CThe maximum deviation of the actual transfer characteristic from an ideal straight line
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Answer: C. The maximum deviation of the actual transfer characteristic from an ideal straight line

INL describes how far each point of the actual transfer characteristic deviates from an ideal straight line, such as the line joining its endpoints. The deviation in spacing between adjacent codes is the differential nonlinearity (DNL), and accumulating DNL corresponds to INL.

  • A. The output deviation at zero input is the offset error.
  • B. The deviation in spacing between adjacent codes is DNL.
  • C. Correct. It is the maximum deviation from the ideal line.
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More AD/DA conversion questions

  1. Which correctly describes the gain error of an AD converter?
  2. What does it mean for a DA converter to be monotonic?
  3. What is the drawback of a binary-weighted resistor DAC, which assigns a different resistor (R, 2R, 4R, ...) to each bit?
  4. How many comparators does a 3-bit flash AD converter need?
  5. If a 10 kHz sine wave is sampled at 12 kHz without an anti-aliasing filter, at what frequency does it appear?