# Linear Integrated Circuit Questions and Answers – Interpreting of Data Sheets – 1

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?
a) Five
b) Eight
c) Two
d) Ten

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:

a) +1.55mA
b) ±1.55mA
c) -1.55mA
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?
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).
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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.

Sanfoundry Global Education & Learning Series – Linear Integrated Circuits.

To practice all areas of Linear Integrated Circuits, here is complete set of 1000+ Multiple Choice Questions and Answers.

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