AD/DA conversion

What is the maximum quantization error of an ideal AD converter? (LSB: the voltage corresponding to one least significant bit)

  1. A±2 LSB
  2. B±1 LSB
  3. C±1/2 LSB
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Answer: C. ±1/2 LSB

Because a continuous analog value is rounded to steps of a fixed width (1 LSB), conversion always introduces error. This quantization error is at most ±1/2 LSB in an ideal ADC. More bits make 1 LSB smaller and reduce quantization error.

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More AD/DA conversion questions

  1. Which is a characteristic of a delta-sigma (ΔΣ) AD converter?
  2. For a 10-bit AD converter with a full-scale input of 1.024 V, what voltage corresponds to 1 LSB?
  3. What type of filter is used as the anti-aliasing filter placed before an AD converter?
  4. Which is a characteristic of an R-2R ladder DA converter?
  5. What is the role of a sample-and-hold circuit placed before an AD converter?