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Digital ElectronicsADC & DAC

Ignoring overhead, an ideal 12-bit successive-approximation ADC that performs one bit decision per clock requires approximately how many comparison steps for one conversion?

  • A6
  • B10
  • C12
  • D4096
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Correct Answer: C. 12
Explanation: A SAR converter determines one output bit per successive approximation step, so an ideal 12-bit conversion requires about 12 bit decisions.
Reference: Standard digital electronics: SAR conversion
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