TL081 Op Amp Pinout, Datasheet, Equivalent, and Application

Operational amplifiers, commonly known as op-amps, are essential building blocks in analog electronic circuits. They are versatile devices used to amplify voltage signals and perform various mathematical operations such as addition, subtraction, integration, and differentiation. Op amps are characterized by their high input impedance, low output impedance, and high gain, making them ideal for signal conditioning, filtering, and many other applications.

The TL081 op amp is a widely used device known for its high input impedance, low input bias current, and high slew rate. With its superior characteristics, The TL081 is particularly valued in applications requiring high-speed and low-noise performance, such as audio processing, data acquisition systems, and precision measurement equipment. In this article, we'll delve into the TL081 op-amp, exploring its pinout, circuit, features, applications, datasheet, etc., and the difference between other op-amps.

What is TL081?

The TL081 is a low-cost, high-speed JFET input single operational amplifier featuring an internally trimmed input offset voltage, thanks to BI-FET II technology. It integrates well-matched high-voltage JFETs and bipolar transistors in a monolithic circuit. This design provides:

• A high slew rate.

• Low input bias current.

• Low offset current.

• A low offset voltage temperature coefficient.

Despite its low supply current requirement, the TL081 maintains a large gain-bandwidth product and a fast slew rate.

TL081 Pinout

Pin Configuration

Pin No.	Pin Name	Description
1,5	Offset NULL	Used to set offset voltage if required
2	Inverting Input (IN-)	The Inverting pin of the Op-Amp
3	Non- Inverting Input (IN+)	The Non-Inverting Pin of the Op-Amp
4	V-	Connected to negative rail or ground
6	Output	Output pin of the Op-Amp
7	V+	Connected to a positive rail of supply voltage
8	NC	Not Connected

Features and Specifications

TL081 Features:

• Low Power Consumption: Typically 1.4 mA per channel

• Wide Common Mode and Differential Voltage Range

• Low Input Bias Current: Typically 30 pm

• Low Input Offset Current: Typically 5 pm

• Output Short Circuit Protection

• Low Total Harmonic Distortion: Typically 0.003%

• High Input Impedance: JFET input stage

• Latch-Free Operation

• High Slew Rate: Typically 13 V/μs

• Common Mode Input Voltage Range Including V CC+

TL081 Specifications:

Absolute Maximum Ratings

TL081 Schematic Diagram

TL081 Circuit

Tl081 CAD Model

Where to use TL081?

The TL081 JFET-input operational amplifier provides a broader range of options compared to earlier operational amplifiers. This single-package Op-Amp has been a staple for a considerable time and is versatile for various general-purpose applications such as voltage followers, buffers, comparators, amplifiers, and adders. If you need a reliable Op-Amp for basic circuit designs, the TL081 is an excellent choice.

How to use TL081?

Below is an inverting amplifier application circuit from the TL081 datasheet. You only need two resistors to configure the TL081 as an inverting amplifier.

An inverting amplifier takes a positive or negative voltage on the inverting input pin and outputs a voltage of the same magnitude but opposite polarity. The output at the VOUT pin is fed back to the input through the feedback resistor (Rf).

The input and output voltages can be calculated as follows:

Vin = I * R1

Vout = -I * Rf

TL081 Applications

• Solar energy: string and central inverters

• Motor drives: AC and servo drive control and power stage modules

• Single-phase online UPS

• Three-phase UPS

• Pro audio mixers

• Battery test equipment

TL081 Typical Applications

High Q notch filter

0.5 Hz square wave oscillator

TL081 Equivalent

• UA741: A widely used integrated circuit (IC) known for its versatility and reliability. It is a general-purpose op-amp with a single channel, offering high performance in various applications. The UA741 is designed to operate from a single power supply, making it suitable for use in battery-powered devices and other low-power applications.

• CA3140: A high-performance op-amp that offers low input current, high gain bandwidth product, and fast response times, making it ideal for precision amplification applications.

Alternatives for Audio Amplifiers: LM4871, AD620, IC6283, JRC45558, LF351N, MC33171N

TL081 Package

TL081 Datasheet

Download TL081 Datasheet PDF.

TL081 vs. TL071

Feature	TL081	TL071
Noise Performance	Higher	Slightly Lower
Power Consumption	Slightly Higher	Slightly Lower
Application	General Purpose	Low-Noise
Electrical Specs	Similar	Similar

TL081 vs. TL082

Feature	TL081	TL082
Configuration	Single	Dual
Number of Op Amps	1	2
Space Efficiency	Less	More
Application	Single Op Amp	Dual Op Amps
Characteristics	Similar	Similar

TL081 vs. LM741

Feature	TL081	LM741
Slew Rate	High	Moderate
Bandwidth	Wide	Narrow
Input Bias Current	Low	Moderate
Noise	Low	Moderate
Application	High-performance	General purpose
Suitability	High-frequency	Less demanding

Related Read: IC 741 Op Amp

Conclusion

The TL081 op amp is a versatile and high-performance component widely used in analog electronics. Key features include its high input impedance, low input bias current, high slew rate, and low noise, making it suitable for a variety of applications. It is a preferred choice for precision analog circuits and offers significant advantages over many older op amps like the LM741. The TL081 remains highly relevant in modern electronics due to its robust performance and reliability. Its characteristics make it ideal for applications in audio processing, instrumentation, signal conditioning, and active filtering. The TL081 continues to be a go-to op-amp for engineers and designers who need a dependable and efficient solution for their analog circuit designs.

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