Exploring TL072 OP-AMP IC Pinout, Datasheet, Where & How to Use It

In contemporary times, the advancement of electronic circuit components has been remarkable, witnessing notable progress in transistors such as JFETs and BJTs. In this context, our attention is directed towards a specific type of high-speed junction field-effect transistor—the TL072 pinout.

For projects involving bass or treble control, particularly in applications like audio circuits, UPS, AC inverters, and solar inverters, the TL072 pinout proves to be the ideal integrated circuit (IC). Subsequently, we explore this operational amplifier, detailing its pin configuration and utilization methods. In this article, we'll delve into the TL072 Op-amp IC and explore where & how to use It.

What is TL072?

The TL072 is a high-speed JFET input single operational amplifier known for its low noise versions and a high slew rate. It possesses modest input bias and offset currents. As a dual Op-amp IC, it houses two op-amps on board. The TL07x series, to which it belongs, exhibits minimal harmonic distortion and noise, making it well-suited for applications demanding high precision, notably in audio pre-amplification.

The TL072 pinout features a bipolar high-speed junction field-effect transistor (JFET). It is often considered an improvement over the single-version TL071, which incorporates only one op-amp. Nevertheless, depending on specific applications, it can function as a dual-input general-purpose operational amplifier.

The dual op-amp IC offers various compelling attributes, including reduced power consumption, low thermal noise, favorable temperature coefficient, and higher slew rates. This unique combination makes the TL072 dual low-noise JFET IC valuable in critical electrical circuits with modular designs. Applications range from UPS, AC inverters, solar inverters, and oscilloscopes to audio signal gain applications.

TL072 Pinout

The accurately labeled TL072 pinout diagram, featuring an animation, authentic image, and symbolic representation, is depicted in the figure below:

TL072 IC Pin Configuration

Pin Configuration

The TL072 pinout encompasses eight pins, and each assigned a distinct function.

Here is a list detailing the eight pins' names and their corresponding parameter values.

Pin No.	Pin Name	Parameter Value / Pin Description
1	Output A(1OUT)	This point serves as the output pin of the first op-amp.
2	Inverting Input A(1IN-)	Here, the pin serves as an inverting input terminal for the first op-amp.
3	Non-Inverting Input A(1IN+)	While on this other end, the terminal serves as a non-inverting input for the first op-amp.
4	GND(Vcc-)	The Ground connection terminal for the IC.
5	Non-Inverting Input B(2IN+)	Here is another non-inverting input for the first op-amp
6	Inverting Input B(2IN-)	This is another inverting input for the first op-amp
7	Output B(2OUT)	You also have another terminal serving as a second output to the dual op-amp.
8	Vcc+	A pivotal terminal supplies the voltage needed to run the circuit.

TL072 Internal Amplifier

The internal amplifier configuration of the TL072 is illustrated in the figure below. 

The TL072 employs two internal amplifiers, as depicted in the section below.

How to Connect the Amplifiers to the IC

Initially, connect the amplifier to pins one and three of the IC. Simultaneously, route the output to pin 1 (OUT) of the TL072 IC.

Conversely, establish a connection for the second amplifier by using pins 5 and 6. Concurrently, link its output to pin 7.

TL072 Symbolic Representation

• The symbolic representation of a device illustrates its internal structure.

• The symbolic diagram for the TL-072 is depicted in the figure below.

• As seen in the figure above, there are two amplifiers in the internal structure of the TL-072.

• The inputs of the first amplifier are connected to pins 1 and 3, and its output is connected to pin 1.

• The inputs of the second amplifier are connected to pins 5 and 6, and its output is connected to pin 7.

Initially, connect the amplifier to pins one and three of the IC. Simultaneously, route the output to pin 1 (OUT) of the TL072 IC.

Conversely, establish a connection for the second amplifier by using pins 5 and 6. Concurrently, link its output to pin 7.

TL072 Schematic Circuit

• The schematic diagram of a device illustrates its internal operations.

• A fully annotated schematic diagram of the TL-072 is beneficial for new users to comprehend its functionality better.

• The appropriately labeled schematic diagram of the TL-072 is presented in the figure below.

TL072 Schematic Circuit

How to use/connect TL072 Op-Amp in a Circuit

To safely incorporate the TL072 op-amp into a circuit, it's essential to adhere to the following guidelines:

• Ensure that the voltage applied does not exceed 36V.

• Avoid driving loads beyond 10 mA.

• Store the IC within a temperature range of > -65oC and < +150oC.

Tone Control Circuit using TL072 Op-Amp

A tone modulation setup generally encompasses an array of filters that fine-tune the signal before channeling it to headphones, speakers, or audio recording devices via an amplifier. This configuration empowers a listener to adjust the produced melody within an audio system. This circuit uses a low-noise input TL072 IC to ensure minimal noise output with only a few external components. It necessitates a dual bias supply for optimal performance, accommodating both positive and negative potentials.

The essential components for constructing this tone modulation setup primarily consist of a TL072 IC operational amplifier, a selection of resistors (1KΩ, 2.2MΩ, 100KΩ, and 10KΩ), a variable resistor of 100KΩ, capacitors including 100pF, 1uF, 22nF, 2.2uF, 2uF, and 220nF, a 15V battery, and connecting wires.

Dual Power Supply Circuit

The operational amplifier (op-amp) incorporated into this arrangement necessitates a dual power supply to optimize its amplification capabilities. To achieve this, a dual supply configuration has been meticulously devised, employing fundamental components. This setup encompasses a step-down transformer, a 1A bridge rectifier responsible for converting AC to DC and filtering capacitors. Initially, the step-down transformer moderates the high AC voltage to a lower level. Subsequently, this diminished voltage undergoes rectification via a 1A bridge rectifier, yielding positive and negative supplies. Additionally, the rectified DC is seamlessly refined by capacitors. Consequently, the output of this circuit yields a dual supply ranging from +15V to 0 to -15V.

Work Principle

The focal element in the circuit below is the TL072 operational amplifier (op-amp). Initially, the audio input signal undergoes processing by the op-amp through a balanced circuit fashioned with resistors and capacitors. Notably, R2 and R3 serve as feedback resistors for amplification. Subsequently, the amplifier's output is directed to the tone control circuit, which governs the audio output signal's treble, bass, and balance aspects. The signal destined for the speaker emanates from the VR2 variable resistor. In this context, the variable resistor extends the signal for amplification in another channel.

Tone Control Circuit using TL072 Op-Amp

Tone modulation circuits find application in diverse devices such as radios, sound systems, portable music players, musical instrument amplifiers, public address systems, and boomboxes.

TL072 Ratings

Before utilizing a specific device, the user must be aware of its current, power, and voltage ratings. These ratings indicate the amount of power consumed by the device.

The figure below illustrates the current, power, and voltage ratings, complete with their typical values and corresponding SI units.

Feature & Specifications

Features:

• Low power consumption, input-bias currents, and offset currents

• Equipped with short circuit protection

• Latch-up-free operation of the IC

• Dual op-amp configuration with two internal op-amps

• High input impedance

• Internal frequency compensation

• Wide common-mode (up to VCC+) and differential voltage range

Specifications:

• Low harmonic distortion (typically 0.003%)

• Low noise during operation

      Vn = 18 nV/√Hz (Typical) at f = 1 kHz

• High slew rate (typically 13 V/μs)

• Supply voltage ranges from 6 to 36V

• Infinite output short circuit duration

• Storage temperature ranges from -65 to 150 °C

• The operating temperature is -40 to 125 °C

• Output current is 10mA (typically)

Where to use TL072?

The TL072 finds its primary application in audio pre-amplification scenarios demanding high precision regarding minimal harmonic distortion and noise.

Audio pre-amplification involves achieving low-noise, minimal interference, and low-distortion audio output while allowing adjustments to volume, bass, and treble. Similar to other op-amp ICs, it functions by comparing voltages, making it suitable for use as a voltage comparator IC.

How to use TL072?

The TL072 proves beneficial for audio pre-amplification, offering enhanced sound quality at an affordable cost and with remarkable precision. When the audio input is linked to the output, it ensures minimal noise and distortion in the output. Leveraging the high input impedance allows for the increase of the resistor R4 value.

R1 plays a role in impedance balance, contributing to distortion reduction. Negative feedback resistors R2 and R3 are employed to measure the output signal. Setting R2 and R3 too high may lead to increased noise, while setting them too low may decrease noise but potentially increase distortion as the IC load rises. R6 discharges or empties the C2 flows, reducing noise spikes.

TL072 Equivalent

The TL072 equivalents have: LM358, NE5532, OPA827, LT1972 and ADA4610-2.

TL072 Applications

The TL072 finds application in various fields, with some examples listed below:

• Audio mixers.

• AC inverters.

• VF drives.

• Oscilloscopes.

• Systems with DLP front projection.

• Solar inverters.

• Uninterruptible Power Supply (UPS).

• A comprehensive circuit design for a quadruple oscillator is illustrated in the figure below.

How to use TL072 Pinout in a Circuit

The circuit diagram below demonstrates an exemplary use of the TL072 pinout, illustrating a low-noise audio preamplifier. This circuit is a practical application of the TL072 in an educational context.

How to Safely Long Run in a Circuit

The TL072 proves valuable as a cost-effective and highly accurate audio pre-amplification device to enhance audio quality. Upon connecting the audio input to the output, the resulting output experiences minimal noise and distortion. The large input impedance facilitates the ability to raise the resistor value.

One of the resistors is responsible for impedance balance, contributing to distortion reduction. Negative feedback resistors are employed to evaluate the output signal. Setting the negative resistor too high can lead to increased noise while setting it too low can reduce noise but may elevate distortion as the IC load increases.

Advantages

The TL072 op amp offers the following advantages:

• Low bias currents, often simplifying circuitry.

• Highly impedance inputs with virtually zero offset and bias currents make it widely used IC.

• Excellent noise performance at medium impedances, typically in the range of 1 to 10 k Ohms.

• High-speed single JFET op-amp.

• Cost-effective.

• Extremely precise for audio pre-amplification.

• Negligible input bias current and input current noise.

• Low power consumption, low noise, latch-up-free operation, high slew rates, and a low-temperature coefficient.

TL072 Package

TL072 Datasheet

Download TL072 Datsheet PDF.

Conclusion

To sum up, the TL072 pin configuration denotes a high-voltage operational amplifier employing JFET transistors. Noteworthy for its minimal noise ratio and elevated slew rates, this component boasts additional commendable traits such as low input offset voltage, minimal harmonic distortion, and a relatively low typical input bias current. These attributes make it well-suited for circuits requiring precision. Significantly, its predominant use lies in pre-amplification within audio circuits. Hence, this is a fitting destination for individuals keen on engaging in do-it-yourself electronic projects.

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