OP07 Operational Amplifier : Pin Configuration & Its Applicaitons

Generally, an op-amp or operational amplifier is a voltage amplifying chip that is mainly used with basic components like resistors & capacitors. In analog devices, it works like the main part. The operation of this IC can be determined by the basic components used. There are different kinds of chips available in the market like TL082, LM358, LM741, LM358, OP07 operational amplifier, etc.

Operational amplifiers are linear chips that are perfect for DC amplification, filtering, signal conditioning, & to perform other mathematical operations. Operational amplifiers are classified into two types namely inverting and non-inverting. This article discusses one of the types like OP07 Operational Amplifier.

What is an OP07 Operational Amplifier?

OP07 operational amplifier is particularly a low offset voltage IC. This op-amp provides long-term stability & less offset through a less-noise, choppers less & bipolar transistor-based amplifier circuit.
This IC is obtainable in an 8-pin DIP (dual inline) packaging otherwise a TO-99 metal is sealed hermetically. These ICs offer an extensive range of features which are discussed below.

OP07 IC includes a single op-amp within the chip & it has a 0.3-V/μs of slew rate. This IC includes a range of broad input voltage & performs a low noise operation.

Pin Configuration

The pin configuration of the OP07 operational amplifier is shown below. This IC includes 8-pins where each pin and its working is discussed below.

• Pins1 & 8 (VOS Trim): It is used to fix the offset voltage when it requires
• Pin2 (IN-): This pin is the Inverting (IN-) pin of the operational amplifier
• Pin3 (IN+): This pin is the Non- Inverting (IN+) pin of the IC
• Pin4 (V-): This pin is connected toward the GND or negative rail
• PIn5 (NC): Not connected pin
• Pin6 (Output): This is the output pin of the IC
• Pin7 (V+): This pin is connected to the voltage supply

Specifications & Features

The features and specifications of the OP07 operational amplifier include the following.

• MaxVOS is 75 µV
• The input VOS is very low
• Less offset voltage drift is 1.3 µV/°C
• Time vs Ultrastable (Max) is 1.5 µV/month
• The range of input voltage is wide ±14 Volts
• The range of supply voltage is wide ±3 Volts to ±18 Volts
• Less noise like 0.6 µV p-p
• It fits in the sockets like 108A, 725, 308A, AD510 & 741
• The voltage supply is ±22 V
• Voltage (Vin) is ±22 V
• Differential Vin (Input Voltage) is ±30 V
• Duration of o/p short circuit is Indefinite
• The range of storage temperature is −65°C to +125°C
• The range of operating temperature is 0°C – 70°C
• Junction temperature is 150°C
• The temperature of lead for soldering is 300°C

Equivalent ICs of OP07 operational amplifier are CA3140, UA741, MC33171, TL081, etc. Alternative ICs of OP07 op-amp are LM4871, IC6283, AD620, LF351, JRC45558, etc.

The OP07 operational amplifier is long-term strength & an extremely low offset integrated circuit. These can be achieved through less noise and a bipolar transistor-based amplifier circuit. In most applications, exterior components are not necessary for compensation of frequency & offset nulling.

This operational amplifier includes correct differential input, excellent common-mode rejection, wide i/p range of voltage, flexibility & high performance in high noise surroundings. On the whole range of temperature, very high input impedance and low bias currents are maintained This IC is suitable for industry-based instrumentation applications due to stability, accuracy, high gain, etc.

How to use OP07 Operational Amplifier

This operational amplifier can be operated by providing the voltage supply to this IC. This IC operates with a single supply otherwise dual supply based on the application. It can resist ± 22V maximum. If the voltage supply is higher than this value, then it can harm the IC permanently.

Preferably, both the op-amp inputs must give zero output once it is connected to GND however, in reality, they are at dissimilar potentials.

So, this op-amp includes 2- input offset pins to fix the offset voltage throughout exterior circuitry to regulate these mismatches. Usually, a resistor otherwise a potentiometer is connected among the two input pins. Once the potentiometer’s resistance is adjusted, we can fix the preferred value.

The potentiometer is mostly used where precise offset control is required. The interior OP07 amplifier circuit restricts the o/p voltage in ± 12 V. The applications circuit of the OP07 operational amplifier is shown below.

Differential Amplifier Circuit using OP07 Operational Amplifier

The simple differential amplifier circuit using the OP07 operational amplifier is shown below. This circuit can be built with three operational amplifiers which are denoted Al, A2 & A3.

The first two op-amps like A1 & A2 are allied in a non-inverting configuration with an A3 amplifier. In the following circuit, the A3 op-amp is called a subtractor circuit. Here this circuit changes the differential signal among the two floating points like a & b within a single-ended o/p voltage.

Generally, the A3 amplifier is used within unity gain whereas all the resistors like R4 to R7 are all equivalent. Once resistors are used with a 0.1% of tolerance, common-mode rejection surpasses 60 dB. Further development can be attained through a potentiometer. For a perfect common-mode rejection ratio, the potentiometer can be regulated.

Both the Al & A2 operational amplifiers have some differential gain, however, the input voltage of common-mode will achieve experience unit. These pressures do not emerge like differential signals to the A3 amplifier’s input, because once they emerge at similar levels at both endings of the R2 resistor. This kind of low-level differential amplifier is extensively used within signal processing.

It is also very useful for low-frequency signals & usually obtained from a thermocouple output or a sensor that is improved & broadcasted within a balanced mode. This amplifier circuit is powered through ± 15V and it is simply required for zero i/p offset voltage for the A3 output amplifier.

Where to use/Applications

The applications of the OP07 operational amplifier include the following.

• The OP07 operational amplifier includes high open-loop gain & very little input bias current. However, it does not influence the accuracy & maintenance through linearity.
• The above-mentioned main features will make this operational amplifier useful in instrumentation applications as they need high gain. It provides extremely precise output in non-inverting circuits also because of maximum impedance on input.
• This IC is used in different applications like the following.
• Optical networks
• Precision filters
• Wireless base station
• Sensors & controls
• Strain bridges
• Thermocouples
• Instrumentation
• RTDs (Resistor thermal detectors)
• Shunt current measurements
• Medical Instrumentation
• Low-Level Signal Processing
• Thermocouple Amplifiers
• High Accuracy Data Acquisition

Thus, this is all about an overview of the OP07 operational amplifier datasheet which includes pin configuration, features, specifications, circuit, and its applications. Here is a question for you, what is a precision amplifier?