Weighted Resistor and R-2R DAC Quiz

In a weighted resistor DAC, what determines the analog output voltage?

• Number of comparators

• Number of capacitors

• Binary input and resistor values

• Clock frequency

Which of the following resistor combinations are typically used in a 4-bit weighted resistor DAC?

• R, R, R, R

• R, 2R, 3R, 4R

• R, 2R, 4R, 8R

• R, 10R, 100R, 1000R

In a 3-bit weighted resistor DAC using resistors of R, 2R, and 4R, the LSB corresponds to which resistor?

• R

• 2R

• 4R

• 8R

What is the main disadvantage of a weighted resistor DAC?

• Slow conversion rate

• Difficulty in matching precise resistor values for higher bits

• High power consumption

• Requires ADC for operation

If a 4-bit DAC has a reference voltage of 8V, what is the output voltage for the binary input 1000?

• 0.5 V

• 1 V

• 4 V

• 8 V

If a 4-bit DAC has a reference voltage of 8V, what is the output voltage for the binary input 0001?

• 0.5 V

• 1 V

• 0.0625 V

• 0.5 mV

For binary input 0010, the output voltage of the 4-bit DAC (Vref = 8V) is:

• 1 V

• 2 V

• 1.5 V

• 0.5 V

What is the output for binary input 0000 in a 4-bit DAC with Vref = 8V?

• 0 V

• 0.5 V

• 8 V

• 1 V

What is the main advantage of an R-2R ladder DAC over a weighted resistor DAC?

• Lower resolution

• Requires more precise resistors

• Easier to fabricate and scale

• Slower response time

In an R-2R DAC, what resistor values are used throughout the ladder?

• All resistors are R

• Values of R and 2R only

• Values of R, 2R, 4R

• Random resistor values