OP07 Operational Amplifier IC: Pinout, Datasheet & Its Application

In electronics, we encounter a crucial component known as an operational amplifier or op-amp. This chip is a voltage amplifier typically harnessed alongside fundamental elements such as resistors and capacitors. In analog devices, op-amps assume a central role, influencing their operation based on the interplay of these essential components. The market offers various op-amp options, including renowned names like TL082, LM358, LM741, and the OP07 operational amplifier.

Operational amplifiers, often called op-amps, are linear integrated circuits renowned for their proficiency in tasks such as DC amplification, signal filtering, signal conditioning, and the execution of various mathematical operations. These versatile chips come in two primary classifications: inverting and non-inverting. This article will delve into one of these categories and explore more details about the OP07 Operational Amplifier.

What is an OP07 Operational Amplifier (Op-Amp)?

The OP07 operational amplifier is a specialized integrated circuit with remarkably low offset voltage. The secret to long-term stability and minimal offset lies within its design, achieved through a combination of low-noise, chopperless, and bipolar transistor-based amplification circuitry. Its impressive maximum offset voltage of just 150µV sets this high-precision op-amp apart. Additionally, it boasts low input current requirements, a mere 1.8nA, and exhibits substantial gain, measuring at 400V/mV. These attributes render the OP07C particularly well-suited for applications in instrumentation.

Available in two packaging options, namely the 8-pin DIP (dual inline package) and the hermetically sealed TO-99 metal package, these ICs offer a wide range of features, which we will delve into below.

The OP07 IC houses a single op-amp within its compact design, delivering a slew rate of 0.3-V/μs. Furthermore, this IC accommodates a broad input voltage range while ensuring minimal noise during operation.

OP07 Pinout

Pin configuration

Pin No.	Name	Description
1,8	VOS Trim	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 the positive rail of supply voltage
5	NC	Not Connected

OP07 Features

• Maximum Offset Voltage (MaxVOS): A mere 75 µV, ensuring precision in voltage-related applications.

• Ultra-Low Input Offset Voltage (Input VOS): This IC boasts an impressively low input offset voltage.

• Minimal Offset Voltage Drift: It maintains stability over various temperatures with only 1.3 µV per degree Celsius.

• Ultra-Stable Over Time: It delivers consistent performance with a maximum offset drift of just 1.5 µV per month.

• Wide Input Voltage Range: Can handle input voltages ranging from ±14 Volts, offering versatility.

• Broad Supply Voltage Range: Operates flawlessly within a supply voltage range of ±3 to ±18 Volts.

• Low Noise: Maximum noise level of 0.6 µV peak-to-peak, minimizing interference.

• Socket Compatibility: Fits seamlessly into sockets like 108A, 725, 308A, AD510, and 741.

• Robust Voltage Supply: Handles ±22 Volts with ease.

• Voltage Range (Vin): Supports ±22 Volts for optimal performance.

• Differential Input Voltage (Vin): Accepts differential input voltage up to ±30 Volts.

• Indefinite Output Short Circuit Duration: Can withstand continuous short-circuit conditions.

• Extensive Temperature Range: From freezing -65°C to a scorching +125°C, ensuring reliability in various environments.

• Operating Temperature Range: Performs flawlessly from 0°C to 70°C.

• Junction Temperature: Can endure temperatures as high as 150°C.

• Soldering Lead Temperature: Withstands a soldering lead temperature of 300°C.

• Temperature-Tested Dice: Each unit is rigorously tested at 125°C to guarantee reliability.

Where to Use OP07 Op-Amp?

While the OP07 IC boasts a low input bias current and a substantial open-loop gain, it makes no compromises in gain accuracy and preserves impeccable linearity. These inherent qualities render the OP07 IC exceptionally well-suited for applications demanding high gain levels, particularly in instrumentation.

The OP07, a single operational amplifier, impressively presents a generous minimum input voltage range of ±13 V. This, coupled with a commendable Common-Mode Rejection Ratio (CMRR) of 106 dB and a high input impedance, delivers remarkable accuracy when employed in the non-inverting circuit configuration. Even with high closed-loop gains, the OP07 maintains its superb linearity and gains accuracy. Furthermore, it exhibits remarkable stability in offset and gain over time and across temperature variations. It is these very attributes that have established the OP07 as an industry standard for instrumentation applications.

So, suppose your quest leads you to seek an Op-Amp with an extensive input voltage range, unwavering stability, and uncompromising accuracy in the face of temperature fluctuations. In that case, the OP07 IC is a promising choice worthy of consideration.

How to use OP07 Op-Amp?

To use the OP07 chip, it's crucial to apply the appropriate voltage supply. Depending on your specific application, this chip can operate using either a single or dual supply configuration. However, it's imperative to note that this chip's maximum allowable voltage rating is 22 volts. Exceeding this voltage threshold can lead to irreversible damage to the chip.

In an ideal scenario, when both inputs of an operational amplifier are grounded, they should produce a zero output. However, in practical situations, the inverting and non-inverting inputs may be at different potentials. This disparity can be attributed to various factors such as mismatched collector currents, differences in current gain (β), variations in collector and emitter resistors, and other related elements.

To address these discrepancies, the OP07 provides two input offset pins that enable the offset voltage adjustment through external circuitry. Typically, a resistor or a potentiometer is connected between these input pins. By altering the resistance of the potentiometer, you can precisely set the desired offset value. Potentiometers are commonly employed in applications where precise offset control is paramount.

It's worth noting that the output voltage of the OP07 amplifier is internally limited to 12 V. To illustrate, a circuit configuring the input offset voltage is presented below.

OP07 Circuit

OP07 Amplifier Circuit

Differential Amplifier Circuit using OP07 Operational Amplifier

Below, you can observe a straightforward differential amplifier circuit utilizing the OP07 operational amplifier. This circuit is constructed using three operational amplifiers labeled A1, A2, and A3.

The initial op-amps, A1 and A2, are configured in a non-inverting setup with the A3 amplifier. Within this circuit, the A3 op-amp serves as a subtractor circuit. Its role is to alter the differential signal between two floating points, referred to as 'a' and 'b,' resulting in a single-ended output voltage.

Typically, the A3 amplifier operates at unity gain, and all the resistors, namely R4 through R7, are of equal value. When resistors with a tolerance of 0.1% are employed, the common-mode rejection ratio exceeds 60 dB. Adjustments can be made using a potentiometer to further enhance this rejection ratio, allowing for precise control.

Both the A1 and A2 operational amplifiers exhibit some degree of differential gain. However, common-mode input voltages are effectively attenuated. These pressures do not manifest as differential signals at the input of the A3 amplifier because they appear at equivalent levels at both ends of the R2 resistor. This type of low-level differential amplifier finds extensive application in signal processing.

It is particularly valuable for processing low-frequency signals, typically from sources like thermocouple outputs or sensors that provide improved and balanced mode signals. To power this amplifier circuit, a ±15V supply is utilized, and it is essential to ensure zero input offset voltage for the A3 output amplifier.

What are the Advantages of OP07 IC?

The OP07 provides excellent characteristics, including low offset and long-term stability. It achieves this through a low-noise amplifier circuit that does not rely on chopper techniques and utilizes bipolar input transistors. In most cases, there is no need for external components to nullify offset or handle frequency compensation.

This operational amplifier boasts a true differential input, featuring a broad input voltage range and exceptional common-mode rejection capabilities. These attributes make it highly adaptable and suitable for applications in noisy environments and non-inverting configurations. Moreover, it consistently maintains low bias currents and extremely high input impedances across a wide temperature range.

Here are some notable advantages of the OP07:

• Precision

OP07 ICs are celebrated for their precision, guaranteeing accurate signal processing across various applications.

• Versatility

The adaptability of the OP07 IC to various circuit configurations and applications renders it a versatile option for engineers.

• Low Noise

Thanks to minimal noise interference, the OP07 IC excels in applications where preserving signal fidelity is paramount.

• Longevity

These ICs are constructed for durability, featuring robust designs that extend their operational lifespan.

OP07 Application

The applications of this IC encompass a wide range of fields, including:

• Optical networks

• Precision filters

• Wireless base stations

• Sensors and controls

• Strain bridges

• Thermocouples

• Instrumentation

• RTDs (Resistor thermal detectors)

• Shunt current measurements

• Medical instrumentation

• Low-level signal processing

• Thermocouple amplifiers

• High-accuracy data acquisition

OP07 Equivalents & Alternatives

OP07 operational amplifier has several equivalent ICs, including CA3140, UA741, MC33171, TL081, LM339, LM4558, RC4558, NJM4560, and others. Additionally, alternative ICs to the OP07 op-amp include LM4871, IC6283, AD620, LF351, JRC45558, and more.

OP07 Datasheet

Download OP07 datasheet PDF.

Conclusion

That's all about an overview of the OP07 operational amplifier, datasheet,  pin configuration, features, circuit, advantages, and applications. In conclusion, the OP07 Operational Amplifier is a remarkable electronic component known for its precision, versatility, and reliability. Whether you're working on signal conditioning, control systems, or medical devices, the OP07 is a trusted choice.

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