DAC and ADC Fundamentals

What is the basic principle behind a weighted resistor DAC?

• Binary weighting of resistors in a ladder network

• Binary weighting of capacitors in a ladder network

• Analog weighting of capacitors in a ladder network

• Digital weighting of resistors in a ladder network

Explain how an R-2R ladder DAC works.

• An R-2R ladder DAC works by utilizing a single resistor to convert digital input.

• An R-2R ladder DAC works by using capacitors instead of resistors.

• An R-2R ladder DAC works by using a network of resistors in a ladder-like configuration to convert digital input into analog output voltage.

• An R-2R ladder DAC works by converting analog input into digital output voltage.

How does a single slope ADC convert analog signals to digital?

• By comparing the input analog signal to a reference voltage and converting the time taken to reach the reference voltage into a digital value.

• By using a complex algorithm that analyzes the frequency of the analog signal

• By measuring the amplitude of the analog signal and assigning a digital value based on it

• By converting the input analog signal directly into binary without any comparison

Describe the operation of a dual slope ADC.

• A dual slope ADC operates by integrating the input voltage with a known reference voltage for a fixed time, resetting the integrator, integrating again with the opposite polarity reference voltage, and measuring the time for the integrator output to return to zero to determine the input voltage.

• A dual slope ADC operates by comparing the input voltage to a fixed reference voltage and converting it to a digital output.

• The operation of a dual slope ADC involves sampling the input voltage at regular intervals to determine the digital output.

• In a dual slope ADC, the input voltage is directly converted to a digital output without any integration process.

What is the process followed by a successive approximation ADC to convert analog to digital?

• Binary search method

• Analog synthesis method

• Continuous integration method

• Digital compression method

In what way does a flash ADC differ from other types of ADCs?

• Flash ADCs operate at a slower speed compared to other types of ADCs.

• Flash ADCs use digital-to-analog converters for direct conversion.

• Flash ADCs use comparators for direct conversion.

• Flash ADCs have a higher resolution than other types of ADCs.

What is the significance of the resistor values in a weighted resistor DAC?

• The resistor values control the output impedance of the DAC

• The significance of the resistor values in a weighted resistor DAC is to establish the binary weighting of the input voltage levels.

• The resistor values are used to adjust the gain of the DAC

• The resistor values determine the clock frequency of the DAC

Why is an R-2R ladder network commonly used in DACs?

• It requires additional power sources

• It provides a simple and cost-effective way to convert digital signals to analog voltages.

• It increases the complexity of the circuit design

• It reduces the accuracy of the digital to analog conversion

What is the main advantage of a single slope ADC?

• Higher accuracy

• Simplicity and lower cost

• Increased resolution

• Faster conversion speed

How does a dual slope ADC eliminate the need for a high-speed comparator?

• A dual slope ADC eliminates the need for a high-speed comparator by directly converting the analog signal to digital without comparison.

• A dual slope ADC eliminates the need for a high-speed comparator by increasing the sampling rate to compensate for the lack of comparator speed.

• A dual slope ADC eliminates the need for a high-speed comparator by using a high-speed comparator with a variable reference voltage.

• A dual slope ADC eliminates the need for a high-speed comparator by using a slow comparator in conjunction with a known reference voltage.