Select the statement that best describes the input resistor values for a simple DAC using an op- amp as a summing amplifier.
A) They are binarily weighted with the LSB resistor having the largest value and the MSB having a value equal to the feedback resistor.
B) They are binarily weighted with the LSB resistor having a value equal to the feedback resistor and the MSB having the highest value.
C) Starting with the MSB resistor, the values decrease by a factor of 4 to the LSB resistor.
D) Starting with the LSB resistor, the values increase by a factor of 4 to the MSB resistor.

Question

Quizplus · Accepted Answer

In a simple DAC using an op-amp as a summing amplifier, the input resistors are binarily weighted, with the least significant bit (LSB) resistor having the largest value and the most significant bit (MSB) having a value equal to the feedback resistor. This configuration ensures that each bit contributes a value to the output that is half of the bit before it, creating a binary weighted distribution.

Select the Statement That Best Describes the Input Resistor Values