## How does a 741 op amp work?

## How does a 741 op amp work?

The 741 Op Amp IC is a monolithic integrated circuit, comprising of a general purpose Operational Amplifier. It was first manufactured by Fairchild semiconductors in the year 1963. The number 741 indicates that this operational amplifier IC has 7 functional pins, 4 pins capable of taking input and 1 output pin.

**What is maximum input voltage for 741 opamp?**

+18 volts

Supply-voltage operating range for the 741 is +4.5 volts (minimum) to +18 volts (maximum), and it is specified for operation between +5 and +15 Vdc. The device will operate essentially the same over this range of voltages without change in timing period.

### How do I know if my 741 IC is working?

Testing a 741 IC A voltage is applied to pin3 of the op-amp through the variable resistor (10K). All we need to do is to verify whether the voltages V1 and V2 are exactly same or not. Check them using a multi-meter.

**How many number of pins are there in 741 IC?**

The pin diagram of the IC 741 op amp is shown below. It consists of 8 pins where each pin having some functionality which is discussed in the following. Pin 1 is Offset null. Pin 2 is Inverting input terminal.

#### What is the output impedance of a 741 op-amp?

about 75 ohms

Op-amp Output Impedance For the 741 it is about 75 ohms but can be as high as several thousand ohms for some low power op-amps.

**Why does the IC 741 require dual power supply?**

It needs to avoid use of capacitors and voltage divider bias mainly. For that differential input and output and dual supply implemented. In differential amps we use constant current source, ie current mirror. So for the biasing, it needs dual supply.

## What is the input resistance of IC 741?

For the 741 the input resistance measured to one input with the other grounded is about 2 Megohms. For FET input devices it is typically 10^12 ohms.

**What is the output resistance of op amp IC 741?**

Op-amp Output Impedance For the 741 it is about 75 ohms but can be as high as several thousand ohms for some low power op-amps.