AD/DA conversion

How many output levels can an 8-bit AD converter represent?

  1. A8 levels
  2. B256 levels
  3. C1024 levels
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Answer: B. 256 levels

An N-bit converter can represent 2 to the power N levels. For 8 bits, that is 2⁸ = 256 levels. 1024 levels corresponds to 10 bits. Each additional bit doubles the number of levels, allowing finer voltage differences to be distinguished.

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More AD/DA conversion questions

  1. What sampling frequency is needed to sample an analog signal containing components up to 20 kHz without aliasing?
  2. Which is a characteristic of a flash AD converter?
  3. Which correctly describes the operation of a successive-approximation (SAR) AD converter?
  4. What is the maximum quantization error of an ideal AD converter? (LSB: the voltage corresponding to one least significant bit)
  5. Which is a characteristic of a delta-sigma (ΔΣ) AD converter?