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WorksheetsADC, DAC & sensors
Total questions: 20
Worksheet time: 23mins
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?
(a)
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)
(a)
What will be the analog output if '1101' digital input is given in the summing Op-Amp shown in the figure?
(a)
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)
A 8-bit DAC has a step size of 10 mV. Determine the percentage resolution.
(a)
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
What type of sensor is commonly used to measure temperature in electronic devices?
Photocell
Thermocouple
Hall Effect Sensor
Strain Gauge
Which of the following sensors is used to detect motion in security systems?
Accelerometer
Infrared (IR) Sensor
Gyroscope
Ultrasonic Sensor
What type of sensor is used for measuring air pressure?
pH Sensor
Barometer
Load Cell
LVDT Sensor
Which sensor is typically used for detecting the presence of metals in proximity applications?
Proximity Sensor
Capacitive Sensor
Hall Effect Sensor
pH Sensor
What is the primary function of a photoresistor (LDR)?
Detect light intensity
Measure temperature
Sense proximity
Detect gas concentration
Choose the correct combination:
Pressure sensor, Sonar, radar
Ultrasonic sensor, radar, GPS
Human eye, GPS, Water level sensor
Radiometer, Pressure sensor, light sensor
Which sensor is commonly used for measuring the speed of a rotating shaft?
Tachometer
Proximity Sensor
Capacitive Sensor
Ultrasonic Sensor
What is the main function of a gas sensor?
Measure light intensity
Detect humidity levels
Sense gas concentration
Measure gas temperature
Which of the following converts a physical parameter into an electrical signal?
Tranformer
Crystal
Speaker
Transducer
A Hall effect sensor is a device that is used to measure the magnitude of:
Height of a Hall
Electric field
Magnetic field
Force
