AD/DA conversion

Which correctly describes the gain error of an AD converter?

  1. AThe slope of the transfer characteristic deviates from ideal, so the error grows toward full scale
  2. BThe output deviates from 0 when the input is 0
  3. CA particular code is never output
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Answer: A. The slope of the transfer characteristic deviates from ideal, so the error grows toward full scale

Gain error is the error caused by the slope of the transfer characteristic (after correcting offset) differing from the ideal slope. The error grows with input and is largest at full scale. Errors in the reference voltage are a typical cause.

  • A. Correct. It is the error due to a slope deviation.
  • B. Output deviation at zero input is the offset error.
  • C. A code that never appears is a missing code.
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More AD/DA conversion questions

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