AD/DA conversion

What does an AD converter (ADC) do?

  1. AConverts an analog signal into digital values
  2. BConverts digital values into an analog signal
  3. CConverts a DC voltage into an AC voltage
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Answer: A. Converts an analog signal into digital values

An ADC (analog-to-digital converter) samples a continuous analog voltage, such as from a sensor, at regular intervals and converts it into discrete numbers (digital values). Converting digital values back to an analog signal is the job of a DA converter (DAC).

  • A. Correct. It converts analog to digital.
  • B. Converting digital to analog is the job of a DA converter.
  • C. Converting DC to AC is the job of an inverter.
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More AD/DA conversion questions

  1. Which is the most appropriate example of where a DA converter (DAC) is used?
  2. For AD converters with the same input range, what happens when the resolution (number of bits) is increased?
  3. Which correctly describes "sampling" in AD conversion?
  4. What is the error caused by quantization in AD conversion called?
  5. What is the sampling frequency of a music CD?