ADC, DAC & sensors

A 5-bit DAC has a current output. For a digital input of 10100, an output current of 20mA is produced. What will IOUT be for a digital input of 11001, in mA?

What is the largest value of output voltage from an 6-bit DAC that produces 1.0V for a digital input of 110010 in volt ? (rounded off to 2nd decimal places)

What will be the analog output if '1101' digital input is given in the summing Op-Amp shown in the figure?

A 4-bit D/A converter produces VOUT = 0.3V for a digital input of 0001. Find the value of Vout for an input of '1111'. (Give ans in volts)

A 8-bit DAC has a step size of 10 mV. Determine the percentage resolution.

What do you mean by 'settling time' ?

• DAC output to go from

  full scale to zero

• DAC output to go from zero to

  full scale

• DAC output settle to 5volt

• DAC output settle to 0 volt

Resolution is often referred to as:

• quantization error

• built-in error

• both quantization and built-in error

• none of these

Which conversion process is generally more complex and time-consuming ?

• A/D conversion

• D/A conversion

The value of conversion time depends on:

• VA value

• EOC signal

• START pulse

• None of these

Resolution of the ADC is :

• Less than the resolution of the DAC

• Equal to the resolution of the DAC

• Greater than the resolution of the DAC

• Depends upon clock frequency