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Home > Other > TL081 Op Amp Pinout, Datasheet, Equivalent, and Application

TL081 Op Amp Pinout, Datasheet, Equivalent, and Application

Update Time: 2024-05-23 13:59:47

Contents

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?


TL081 Op Amp.jpg



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


TL081-Pinout.png


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 Absolute Maximum Ratings.png


TL081 Schematic Diagram


TL081 Schematic Diagram.png


TL081 Circuit


TL081 Circuit.png


Tl081 CAD Model


TL081 CAD Model.png


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.



TL081-Application-Circuit.png


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


TL081 High Q notch filter.png




0.5 Hz square wave oscillator



TL081 0.5 Hz square wave oscillator.png


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, JRC45558LF351NMC33171N


TL081 Package


TL081 Package.png


TL081 Datasheet


Download TL081 Datasheet PDF.


TL081 vs. TL071



FeatureTL081TL071
Noise PerformanceHigherSlightly Lower
Power ConsumptionSlightly HigherSlightly Lower
ApplicationGeneral PurposeLow-Noise
Electrical SpecsSimilarSimilar



TL081 vs. TL082


FeatureTL081TL082
ConfigurationSingleDual
Number of Op Amps12
Space EfficiencyLessMore
ApplicationSingle Op AmpDual Op Amps
CharacteristicsSimilarSimilar



TL081 vs. LM741



FeatureTL081LM741
Slew RateHighModerate
BandwidthWideNarrow
Input Bias CurrentLowModerate
NoiseLowModerate
ApplicationHigh-performanceGeneral purpose
SuitabilityHigh-frequencyLess demanding


Related ReadIC 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.


Read More



Previous: CR123 vs. CR123A Batteries: How to Choose the Better One?

Next: LF356 JFET Input Operational Amplifier Datasheet, Pinout, Circuit Diagram and Equivalent

FAQ

  • What's the function of TL081?
  • The TL081L is a single operational amplifier used for pre-amplification in a combined power amplifier.


  • What is the maximum voltage of TL081?
  • 36 V.


  • What is the slew rate of TL081?
  • 13 V/us.


  • Is a higher slew rate better?
  • Yes, a higher slew rate indicates better performance.


  • Can TL081 replace 741?
  • Yes, the pin diagrams are the same. However, the former uses a field-effect transistor input, resulting in superior performance. The 741, on the other hand, is a general-purpose operational amplifier with long-term reliability. It can be substituted with OP07 and similar alternatives.

  • What are common issues encountered with the TL081, and how can they be resolved?
  • Common issues with the TL081 include noise susceptibility, power supply sensitivity, and potential instability. These can be resolved by ensuring proper power supply decoupling, using low-noise circuit design techniques, and implementing compensation networks to enhance stability. Regular testing and measurement can help identify and mitigate these issues early in the design process.

  • What is an inverting op-amp?
  • An inverting operational amplifier (op-amp) is a circuit where the output voltage changes in the opposite direction to the input voltage.

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