LM358 Dual Operational Amplifier

Table of Contents

LM358 Dual Operational Amplifier

What is LM358?

LM358 is a dual operational amplifier that is commonly used in electronic circuits. It is designed to operate from a single power supply over a wide range of voltages. The LM358 is known for its low power consumption, high gain, and wide bandwidth capabilities. It is commonly used in audio amplifiers, signal conditioning circuits, and voltage comparators.

LM358 Pinout

The LM358 has a total of 8 pins, each with a different function, as shown in the following pin diagram and description.

Pin diagram of LM358
Pin diagram of LM358

Pin Description

Pin NumberPin NameDescription
1 and 7Outputthe outputs of the comparator
2 and 6Input(-)inverting inputs
3 and 5Input(+)in-phase inputs
8VCCPositive power supply (5-32V)

LM358 Specification

  • Input bias current: 45 nA
  • Input detuning current: 50 nA
  • Low supply current: – 700 uA
  • Single supply voltage: – 3 V to 32 V
  • Dual supply voltage: – ±1.5 V to ±16 V
  • Input detuning voltage: 2.9 mV
  • Input differential voltage: ±32 V
  • Input Common Mode Voltage: -0.3 V to 32 V
  • Common-mode rejection ratio: 80 d
  • Power supply rejection ratio: 100 d
  • Operating temperature – 0˚C to 70˚C
  • Storage temperature – 65˚C to 150˚C
  • Package option: 8-DIP, 8-SOP

How does LM358 Work?

The working principle of the LM358 op-amp is quite simple. The amplifier has two inputs, one is the inverting input (marked as “-” on the IC) and the other is the non-inverting input (marked as “+” on the IC).

When a voltage is applied to the non-inverting input, it is compared with the voltage applied to the inverting input. Depending on the difference in voltage between the two inputs, the output of the amplifier goes either high or low. If the voltage at the non-inverting input is higher than the voltage at the inverting input, the output of the amplifier goes high. Conversely, if the voltage at the inverting input is higher than the non-inverting input, the output of the amplifier goes low.

LM358 Amplifier Schematic Diagram
LM358 Amplifier Schematic Diagram

The gain of the LM358 op-amp can be adjusted by connecting a feedback resistor between the output and the inverting input. The gain of the amplifier is given by the formula:

Gain = -Rf / Rin

Where Rf is the feedback resistor and Rin is the input resistor.

LM358 Typical Application Circuits

LM358 Package Size

LM358 8-DIP Package
LM358 8-SOP Package

LM358 Application

  • Sensing Amplifier
  • DC Gain Module
  • Audio amplifier
  • Active Filters
  • Voltage Followers
  • Digital Multimeter
  • Oscilloscopes
  • Comparator
  • Loop Transmitter


Join our subscribers list to get monthly blog updates, technology news, case studies. We will never send spam, and you can unsubscribe at any time.

About Author

Aidan Taylor
Aidan Taylor

I am Aidan Taylor and I have over 10 years of experience in the field of PCB Reverse Engineering, PCB design and IC Unlock.

Need Help?

Don't hesitate - Get in touch today to find out how we can help take your project to the next level.

Table of Contents

Scroll to Top
welldone pcb manufacturer

Start to Achieve Your PCB Project