AD/DA conversion

Which is the most appropriate example of where a DA converter (DAC) is used?

  1. AReading a temperature sensor's voltage into a microcontroller
  2. BTurning digital audio data into an analog signal to drive a speaker
  3. CConverting the pixel voltages of a camera's image sensor into numbers
Show answer and explanation

Answer: B. Turning digital audio data into an analog signal to drive a speaker

A DAC converts digital values into an analog voltage or current. A typical use is turning digital audio data back into an analog signal that an amplifier and speaker can play. Turning a sensor voltage into a number is the role of an ADC.

  • A. Turning a sensor voltage into a number is the role of an ADC.
  • B. Correct. Converting digital audio into an analog signal is a DAC's job.
  • C. Turning pixel voltages into numbers is the role of an ADC.
Practice this topic Back to topic

More AD/DA conversion questions

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