LM358 [Texas Instruments]

Product Overview

Texas Instruments LM358 is a dual general-purpose operational amplifier designed for signal conditioning, voltage amplification, active filtering, and control circuits. The original LM358 operates from a 3V to 30V total supply and provides a typical gain-bandwidth product of 700kHz with a typical slew rate of 0.3V/µs.

Its input common-mode range includes the negative supply rail, allowing ground-referenced signals to be amplified in single-supply systems. Two amplifier channels share one package, while low quiescent current and unity-gain operation support straightforward buffer and feedback circuits.

LM358 is the base device designation; a complete ordering suffix is needed to identify the package and shipping format. TI lists the original LM358 as Active, with an operating ambient temperature range of 0°C to +70°C and several eight-pin package options.

Part Number Breakdown

Documented package codes include D for SOIC, DGK for VSSOP, PW for TSSOP, P for PDIP, and PS for SOP. The complete ordering code determines the actual package and shipping format. Key Parameters

Competitive Advantages

Key Features

1. Two Amplifiers in One Package

The LM358 integrates two operational amplifier channels with separate inputs and outputs.

Advantages:

• Supports two signal paths in one device
• Reduces package count
• Accommodates amplification and filtering in successive stages

2. Single-Supply Operation

The device operates from a positive supply and ground, with a total operating supply range extending from 3V to 30V.

Advantages:

• Simplifies power-supply arrangements
• Supports common low-voltage control circuits
• Accommodates a range of equipment supply voltages

3. Ground-Inclusive Input Range

The input common-mode range reaches the negative supply rail, including ground in a single-supply circuit.

Advantages:

• Supports ground-referenced sensor signals
• Simplifies near-ground voltage measurements
• Can reduce the need for input level shifting

4. Low Quiescent Current

Typical no-load supply current is 350µA per amplifier at a 5V supply.

Advantages:

• Helps limit standby power consumption
• Reduces amplifier self-heating
• Supports systems with multiple analog channels

5. Unity-Gain Operation

The LM358 supports voltage-follower configurations as well as conventional inverting and noninverting gain stages.

Advantages:

• Provides simple signal buffering
• Supports active low-frequency filters
• Allows gain to be selected with external feedback components

6. Multiple Package Options

The original LM358 is available in both surface-mount and through-hole package formats.

Advantages:

• Supports compact PCB layouts
• Accommodates breadboard and prototype development
• Provides options for maintaining existing board designs

Applications

Representative applications should be selected within the device’s bandwidth, offset, input-range, and output-swing limits.

Sensor Signal Conditioning

• Temperature-sensor amplification
• Low-frequency transducer interfaces
• Ground-referenced voltage sensing
• Analog signal buffering

Power and Control Circuits

• Power-supply feedback amplifiers
• Battery-voltage monitoring
• Charger control loops
• Low-side current-sense amplification

General Analog Processing

• Active low-pass filters
• Summing amplifiers
• Integrator circuits
• Appliance-control signal conditioning