Module 4 LIC

Express the output voltage of digital to analog converter?

• Vo =KVFS(d12-1+d22-2+….dn2-n)

• Vo =VFS/k(d12-1+d22-2+….dn2-n)

• Vo =VFS(d12-1+d22-2+….dn2-n)

• Vo =K(d12-1+d22-2+….dn2-n)

Why the switches used in weighted resistor DAC are of single pole double throw (SPDT) type?

• To connect the resistance to reference voltage

• To connect the resistance to ground

• To connect the resistance to either reference voltage or ground

• To connect the resistance to output

Pick out the incorrect statement “In a 3 bit weighted resistor DAC”

• Although the op-amp is connected in inverting mode, it can also be connected in non-inverting mode

• The op-amp simply work as a current to voltage converter

• The polarity of the reference voltage is chosen in accordance with the input voltage

• None of the above

What is the disadvantage of binary weighted type DAC?

• Require wide range of resistors

• High operating frequency

• High power consumption

• Slow switching

The smallest resistor in a 12 bit weighted resistor DAC is 2.5kΩ, what will be the largest resistor value?

• 40.96MΩ

• 10.24MΩ

• 61.44 MΩ

• 18.43MΩ

How to overcome the limitation of binary weighted resistor type DAC?

• Using R-2R ladder type DAC

• Multiplying DACs

• Using monolithic DAC

• Using hybrid DAC

Which type of switches are not preferable for a simple weighted resistor DAC?

• Bipolar Transistor

• Voltage switches

• MOSFET

• All of the mentioned

Calculate the value of LSB and MSB of a 12-bit DAC for 10v?

• LSB =7.8mv, MSB =5v

• LSB =9.3mv, MSB =5v

• LSB =14.3mv, MSB =5v

• LSB =2.4mv, MSB =5v

A 10-bit D/A converter have an output range from 0-9v. Calculate the output voltage produced when the input binary number is 1110001010.

• ±7.96v

• -7.96v

• 7.96v

• None of the mentioned

How many control lines are present in analog to digital converter in addition to reference voltage

• Three

• Two

• One