Interfacing to the Analog World problems
- 1. When comparing the conversions from digital-to-analog and analog-to-digital, the A/D conversion is generally:
Options- A. less complicated but more time consuming than the D/A conversion.
- B. more complicated and more time consuming than the D/A conversion.
- C. less complicated and less time consuming than the D/A conversion.
- D. more complicated but less time consuming than the D/A conversion. Discuss
Correct Answer: more complicated and more time consuming than the D/A conversion.
- 2. What is the acquisition time of the AD1154 sample-and-hold IC?
Options- A. 1.5 µs
- B. 2.5 µs
- C. 3.5 µs
- D. 4.5 µs Discuss
Correct Answer: 3.5 µs
- 3. The primary disadvantage of the simultaneous A/D converter is:
Options- A. that it requires the input voltage to be applied to the inputs simultaneously
- B. the long conversion time required
- C. the large number of output lines required to simultaneously decode the input voltage
- D. the large number of comparators required to represent a reasonable sized binary number Discuss
Correct Answer: the large number of comparators required to represent a reasonable sized binary number
- 4. What is the speed of the up/down digital-ramp ADC (tracking ADC)?
Options- A. 20 µs
- B. 10 µs
- C. 1 µs
- D. Relatively slow Discuss
Correct Answer: Relatively slow
- 5. Electrical quantities can be interpreted without conditioning by a digital computer.
Options- A. True
- B. False Discuss
Correct Answer: False
- 6. An AD7524 is an eight-bit D/A converter that uses an R/2R ladder network.
Options- A. True
- B. False Discuss
Correct Answer: True
- 7. Two characteristics of ideal operational amplifiers are very high input impedance and very high voltage gain.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. The output voltage or current of a digital-to-analog converter is truly an analog signal.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. The amount of deviation of the measured step size from the ideal step size is a measure of linearity.
Options- A. True
- B. False Discuss
Correct Answer: True
- 10. In a digital storage scope, when memory is full, the next data point is lost.
Options- A. True
- B. False Discuss
Correct Answer: False
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