OP AMP IC 741

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The pin configuration of the IC 741 operational amplifier is shown below. The op amp 741 pin diagram and the functionality of each pin are explained clearly in the below section.

Power Supply Pins: Pin 4 and 7

Pin 4 and pin 7 are the negative and positive voltage power supply terminals. The power which is required for the IC to function is received from both these pins. The voltage level between these pins can be in the range of 5 – 18V.

Output Pin: Pin 6

The output which is delivered from the IC 741 op amp is received from this pin. The output voltage that is received at this pin is based on the feedback approach that is used and the voltage level at the input pins.

When the voltage value at pin 6 is high, this corresponds that output voltage is similar to the +ve supply voltage. In the same way, when the voltage value at pin 6 is low, this corresponds that output voltage is similar to the -ve supply voltage.

Input Pins: Pin 2 and Pin 3

These are the input pins for the operational amplifier. Pin 3 is considered as the inverting input while pin 3 is considered as the non-inverting input pin. When the voltage value at pin 2 >> pin 3 which means that inverting input has a high value of voltage, then the output signal is low.

In the same way, when the voltage value at pin 3 >> pin 2 which means that non- inverting input has a high value of voltage, then the output signal is high.

Offset Null Pins: Pin 1 and Pin 5

As before discussed, this operational amplifier has an increased level of voltage gain. Because of this, even minimal variations in the voltages at both non-inverting and inverting inputs those are happened because of the abnormalities in the constructional procedure or other anomaly’s will show an impact on the output.

In order to overcome this, an offset value of the voltage to be applied at pin 1 and pin 5, and this generally accomplished by a potentiometer.

Not Connected Pin: Pin 8

It is just a pin that is used to fill up the empty pin in the IC 741 Op Amp. It has no connection with any of the internal or external circuits.

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