LM358N Operational Amplifier: Pinout, Datasheet, Circuit, and Uses

Operational amplifiers, or op-amps, are essential components in the world of electronics. They serve as versatile building blocks in various applications, from simple amplification to complex signal processing. One such op-amp, the LM358N, has gained recognition for its efficiency and reliability in numerous circuits. In this article, we'll delve into the LM358N op-amp, exploring its pinout, circuit, features, applications, advantages, datasheet, etc, and the difference between LM358N and LM358P.

Overview of LM358N

The LM358N integrates two autonomous, high-gain op-amps, internally pre-compensated for frequency response. These op-amps are thoughtfully engineered for operation across a broad spectrum of single power supply voltage ranges. Importantly, their power consumption remains consistent, irrespective of the specific voltage level of the power supply.

This versatile component finds applications in transducer amplifiers, DC gain blocks, and a wide array of traditional op-amp circuits. What's noteworthy is that these circuits can be seamlessly integrated into single power supply systems. A prime example is their direct compatibility with the standard +5 V voltage common in logic systems. This ensures they effortlessly serve as the required interface electronics, eliminating the need for extra power supplies.

In their linear operating mode, these op-amps exhibit an input common-mode voltage range that encompasses ground. Furthermore, the output voltage can swing all the way to ground, all while operating from a single power supply voltage.

LM358N Pinout

Pin configuration

Pin No.	Pin Name	Description
1	OUTPUT1	Output of Op-Amp 1
2	INPUT1-	Inverting Input of Op-Amp 1
3	INPUT1+	Non-Inverting Input of Op-Amp 1
4	VEE, GND	Ground or Negative Supply Voltage
5	INPUT2+	Non-Inverting Input of Op-Amp 2
6	INPUT2-	Inverting Input of Op-Amp 2
7	OUTPUT2	Output of Op-Amp 2
8	Vcc	Positive Supply Voltage

LM358N Features and Specifications

• Internally pre-compensated for frequency response

• High DC voltage gain: 100 dB

• Broad bandwidth (unity gain): 1.1 MHz (temperature compensated)

• Negligible supply current per operator, practically unaffected by supply voltage

• Minimal input bias current: 20 nA (temperature compensated)

• Low input offset voltage: 2 mV

• Minimal input offset current: 2 nA

• Extensive power supply range: 3V to 32V (single supply); ±1.5V to ±16V (dual supplies)

• Input common-mode voltage range covers negative rails

• Differential input voltage range matches the power supply voltage

• Substantial output voltage swing from 0 V to (VCC+ -1.5 V)

• Extremely low supply current drain (500 µA) - practically independent of supply voltage

Note: Comprehensive technical details can be available in the LM358N datasheet provided at the end of this page.

LM358N Circuit

LM358N Schematic Diagram

LM358N Application Circuits

• Power Amplifier

• LED Driver

• Voltage Controlled Oscillator (VCO)

• DC Coupled Low-Pass RC Active Filter

• AC Coupled Inverting Amplifier

LM358N Advantages

• Contains two internally pre-compensated operational amplifiers

• Eliminates the requirement for dual power supplies

• Permits direct sensing close to ground (GND), with VOUT also reaching ground

• Compatible with various logic types

• Low power drain suitable for battery-operated applications

LM358N Equivalents

LM358N belongs to LM358 series, it is equivalent to one-half of the LM324. These include LM158, LM258, LM2904, and LM2409. Although these ICs may have slight differences in thermal properties, they are generally suitable replacements for most projects.

LM358N Applications

• Transducer amplifiers

• DC gain blocks

• Conventional op-amp circuits

• Integrators

• Differentiators

• Summer circuits

• Adder configurations

• Voltage follower setups

• Digital multimeters

• Oscilloscopes

• Comparators for loop control and regulation

LM358N Package

DIP8 Package Mechanical Drawing

DIP8 Package Mechanical Data

LM358N vs LM358P

LM358 is a dual operational amplifier. It contains two independent operational amplifiers with high gain and internal frequency compensation. It  

is suitable for a wide range of supply voltage, making it ideal for both single-supply and dual-supply operation. Under recommended operating 

conditions, the supplcurrent is independent of the supply voltage. Its applications include sensor amplifiers, DC gain modules, and any situation 

where operational amplifiers are used with single-supply voltage. We have already provided a detailed introduction to LM358 Dual Op-Amp in  

the last article.

Features:

• Internal frequency compensation.

• High DC voltage gain (approximately 100dB).

• Unity-gain bandwidth (approximately 1MHz).

• Wide supply voltage range: single supply (3-30V), dual supply (±1.5 to ±15V).

• Slew rate (0.3V/μs).

• Low power consumption, suitable for battery-powered devices.

• Low input bias current.

• Wide common-mode input voltage range, including ground.

• Wide differential input voltage range, equal to the supply voltage range, with a large output voltage swing (0 to Vcc-1.5V).

Difference between LM358N and LM358P

LM358P should be single in-line packaging (SIP). The naming conventions for different manufacturers vary. TI's LM358P comes in a DIP package (dual in-line package), while in ST's products, LM358P represents a TSSOP package. LM358N is the model for DIP packaging products from manufacturers such as ST, Philips, ON, NS, and others. Regardless of the package type, the specifications for LM358 from various manufacturers are generally the same.

LM358N Datasheet

Download LM358N datasheet PDF.

Final Thought about LM358N

In conclusion, the LM358N operational amplifier has proven itself as a reliable and versatile component in the world of electronics. Its cost-effectiveness, low power consumption, and wide range of applications make it a top choice for engineers and hobbyists alike.

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