Analog and Digital Converts - Practice Questions

Question 1

Sample-and-hold circuits in analog-to digital converters (ADCs) are designed to:

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Question 2

The key advantage of the successive approximation analog-to-digital converter (ADC) is its conversion speed.

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Question 3

What is the resolution of a digital-to-analog converter (DAC)?

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Question 4

In a binary-weighted digital-to-analog converter (DAC), the values of the input resistors are chosen to be proportional to the binary weights of the corresponding input bits.

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Question 5

A binary-weighted digital-to-analog converter has a feedback resistor, Rf, of 12 komega.gif. If 50 mu.gifA of current is through the resistor, the voltage out of the circuit is:

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Question 6

If we double the number of bits in our digital representation of a number from 4 to 8 bits, we double the relative accuracy of the conversion from digital to analog.

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Question 7

The resolution of a 0–5 V 6-bit digital-to-analog converter (DAC) is:

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Question 8

The difference between analog voltage represented by two adjacent digital codes, or the analog step size, is the:

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Question 9

A binary-weighted digital-to-analog converter has an input resistor of 100 komega.gif. If the resistor is connected to a 5 V source, the current through the resistor is:

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Question 10

A 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 0101.

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