1. Introduction to operational amplifier IC 741
Operational amplifiers are high-gain amplifiers consisting of BJTs or FETS, usually powered by positive and negative supply voltages. The IC 741 or LM741 is one of the most commonly used operational amplifier integrated circuits that performs mathematical operations and amplification functions.
2. Features
The input impedance is greater than 100KΩ.
The output impedance is less than 100Ω.
The frequency range is between 0HZ and 1MZ.
low offset voltage and current.
The voltage gain is approximately 2,00,000.
3. Specifications
Power Supply: It requires at least 5V of power in order to operate properly and can handle up to 18V.
Input impedance: approx. 2 MΩ.
Output impedance: approx. 75 Ω.
Voltage Gain: The minimum frequency range is 2,00,000.
Slew rate (rate at which the op amp can sense a voltage change): 0.5V/µs.
Input offset: in the range of 2mV-6mV.
Output load: recommended to be greater than 2KΩ.
Maximum output current: 20mA.
NOTE: In order for the op amp to function as a voltage amplifier, high input impedance and low output impedance values are recommended. This impedance makes the operational amplifier IC 741 a nearly ideal voltage amplifier. The above specifications are generic and may vary by manufacturer.
4. Operational amplifier IC 741 pin configuration
The symbol and pin configuration of the operational amplifier 741 are shown below. The figure includes eight pins. Among them, the most important pins are 2, 3, and 6 pins; 2 pins represent the inverting terminal, 3 pins represent the non-inverting terminal, and 6 pins represent the output voltage. Inactive in the circuit is pin 8.
5. Operational schematic diagram and internal schematic diagram of operational amplifier IC 741
The standard operational amplifier IC 741 contains a circuit of 20 transistors and 11 resistors. All these transistors and resistors are integrated in a monolithic chip.
6. Application of operational amplifier IC 741
It is used in various amplifiers such as log and anti-log amplifiers, differential amplifiers, etc. to amplify signals at different frequencies from DC to higher
radio frequencies.
It is used to calculate various mathematical operations such as addition, subtraction, division, multiplication, differentiation, integration, etc.
It is used in voltage comparators to compare voltage signals.
It is used in oscillators to generate different waveforms like sine, square, triangle etc. It is also used in pulse width modulators (PWM generators).
It is used for regulated power supply.
It is used in active filters.
It is used in ADCs and DACs to create converters that convert analog signals to binary form and vice versa.
It is used to convert current to voltage and voltage to current.
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