This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Interpreting of Data sheets – 1”.
1. How many sets of electrical specification are there for 741C op-amp?
Explanation: There are two sets of electrical specifications. One set of specification applies at room temperature of 25oC , whereas the other set applies to the commercial temperature range from 0 to 70oC.
2. Calculate the input offset current from the circuit shown below:
d) None of the mentioned
Explanation: The algebraic difference between the current into the inverting and non-inverting terminal is referred to as input offset current.
Iio = |IB1-IB2| =|3.2 – 4.75|=|-1.55|
=> Iio = +1.55mA.
3. What is the value of current drawn from power supply 741c op-amp?
a) Is = 1.5mA
b) Is = 3.2mA
c) Is = 4.0mA
d) Is = 2.8mA
Explanation: Supply current is the current drawn by the op-amp from the power supply; this parameter is not given on most op-amp data. For 741c op-amp, the supply current Is=2.8mA response.
4. Which is a time varying response?
a) Steady state response
b) Transient response
c) Both Steady state and transient response
d) None of the mentioned
Explanation: The rise time and percentage of overshoot are the characteristic of transient response.
5. How is the equivalent input noise voltage and current?
a) Noise voltage = V2/Hz and Noise current = A2/Hz
b) Noise voltage = V3/Hz and Noise current = A2/Hz
c) Noise voltage = V2/Hz and Noise current = A3/Hz
d) Noise voltage = V3/Hz and Noise current = A3/Hz
Explanation: As the electrical noise is random in nature, it is expressed as a root mean square value. The equivalent input noise voltage is expressed as square voltage (V2/Hz) and the equivalent input noise current as square noise current (A2/Hz).
6. The physical closeness of dual and quad package op-amp results in
a) Op-amp coupling
b) Amplifier to amplifier coupling
c) Channel coupling
d) Signal to noise coupling
Explanation: When a signal is applied to the input of only one op-amp, some signal will appear at the output of other op-amp due to the physical closeness of op-amps in dual and quad packages, this causes amplifier to amplifier coupling.
7. A parameter which is applicable only to dual and quad op-amp is
a) Channel separation
b) Gain bandwidth product
c) Long term input offset voltage stability
d) Equivalent input noise voltage and current
Explanation: Channel separation is specified in the dual and quad op-amp data sheet because it is a measure of the amount of electrical coupling between op-amps that are integrated on the same chip.
8. Select the parameter that is not included in the evaluation for ac applications.
a) Gain-bandwidth product
b) Channel separation
c) Slew rate
d) All of the mentioned
Explanation: Slew rate is one of the important factors in selecting the op-amp for ac application particularly at relatively high frequencies application in oscillator, comparators and filters.
9. Which information is not included in a typical data sheet of op-amp?
a) Brief description of the basic type of the device
b) Pin configuration, package type & order information
c) Internal schematic diagram
d) Characteristics analysis of amplifier applications
Explanation: The characteristics of amplifier is included in the datasheet whereas, the application’s characteristics will not be included. Rather a collection of amplifier applications with circuit diagram can be found in the datasheets.
10. Choose the temperature dependent parameter
a) Common mode rejection ratio
b) Voltage gain
c) Output voltage swing
d) Absolute maximum power dissipation
Explanation: Other than absolute maximum power dissipation the remaining are frequency dependent parameters.
Sanfoundry Global Education & Learning Series – Linear Integrated Circuit.