on December 23th 951

LM258 Dual Operational Amplifier IC: Applications, Pinout, and Features

This guide explores the LM258 Dual Operational Amplifier IC, a key component in modern electronics. It covers its applications, unique features, and role in the 'LMxx' semiconductor family. From practical circuits to technical details, the article offers a clear overview of the LM258's capabilities and its impact on electronic design and innovation.

Catalog

What is the LM258 Dual Operational Amplifier IC?

The LM258 is a dual operational amplifier (op-amp) commonly used in applications like comparators, amplifiers, and mathematical operations. It works well with a single power supply, such as a standard 5V, eliminating the need for an additional -5V supply often required in other circuits. This makes it ideal for designs involving transducers and DC amplification. With two op-amps in one package, the LM258 can perform multiple tasks at once, such as buffering and filtering in a single circuit. This makes it useful in areas like signal processing and sensor data handling, where efficiency and compact design are important. Part of the well-known 'LMxx' series, the LM258 is reliable and flexible. It can operate with either a single or split power supply, offering more options for different setups. Its low power consumption is another key feature, making it perfect for battery-powered devices where energy efficiency and longer battery life are priorities. The LM258 is a versatile, efficient, and easy-to-use IC. Its dual functionality and power-saving design make it a valuable component for creating simple yet powerful circuits.

LM258 Pin Configuration

Pin No.	Pin Name	Description
1	1OUT	Output pin of the Op-amp 1
2	1IN-	Inverting input of Op-amp 1
3	1IN+	Non-Inverting input of Op-amp 1
4	GND	Ground
5	2IN+	Non-Inverting input of Op-amp 2
6	2IN-	Inverting input of Op-amp 2
7	2OUT	Output pin of the Op-amp 2
8	VCC	Power supply

LM258 Features and Specifications

Feature and Specifications	Description
Wide Range of Supply Voltage	Can operate over a broad voltage range.
Single Power Supply Operation	Capable of working from a single power source.
Number of Operational Amplifiers	Two individually operated op-amps.
Low Noise Interference	Minimal noise coupling between op-amps.
Wide Bandwidth (Unity Gain)	1 MHz.
Large DC Voltage Gain	100 dB.
Low Input Offset Voltage	2 mV.
Input Common-Mode Voltage Range	Includes ground.
Differential Input Voltage Range	Equal to the power supply voltage.
Internal Frequency Compensation	Integrated frequency stability.
Single Supply Voltage Range	+3.0 V to +32 V.
Dual Supply Voltage Range	+16 V and -16 V.
Low Supply Current Drain	500 µA.
Operating Temperature	-25ºC to 85ºC.
Total Power Dissipation	830 mW.

LM258 Similar ICs

• LM158

• LM158A

• LM358

• LM358A

• LM2904

• LM2904Q

• LM4558

• LM747

How to Operate the LM258 Integrated Circuit?

The LM258 IC is a versatile component that includes two independent operational amplifiers (op-amps). These op-amps can be configured for various purposes, such as amplifiers, comparators, and oscillators, making the IC a go-to option working on electronic projects. One of the most common applications of the LM258 is building a non-inverting amplifier. This type of circuit boosts weak input signals while keeping their original orientation. In this setup, the input signal is connected to the non-inverting pin, and a feedback loop, created with two resistors (R1 and R2), helps control the gain or amplification level. For example, an input voltage of 20 millivolts can be amplified to 220 millivolts without changing its phase.

Application Circuit

The amplification level, or gain, is determined by the resistor values using a simple formula:

This means adjusting R1 and R2 allows you to customize the gain to meet specific needs. For instance, if R1 is 100 ohms and R2 is 10 ohms, the input signal is amplified by a factor of 11. The LM258's dual op-amp design offers flexibility for using both amplifiers in the same circuit or different ones, saving space and simplifying designs. Whether you're amplifying signals or creating more complex circuits, the LM258 is a reliable and adaptable choice for a wide range of applications.

Applications of the LM258

Electronics Applications: Used in power supplies, mobile chargers, desktop PCs, motherboards, and UPS systems.

Computing: Enhances stability, balances signals, and adapts to dynamic power needs in PCs and mobile chargers.

Signal Processing: Handles amplifiers, oscillators, and voltage comparators with precision.

Automation and Appliances: Powers programmable controllers, measuring instruments, and energy-efficient household devices.

Innovation Driver: Combines reliability and functionality, enabling technological advancements.

LM258 2D-Model and Dimensions