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Operational amplifier basic properties explained using LM358 op amp

Hedy · Dasenic Sep 18,2024 3

What is lm358

LM358 is a widely used dual operational amplifier (Operational Amplifier) ​​integrated circuit. It contains two independent high-gain operational amplifiers and can operate in single or dual power supply mode. It is suitable for a variety of analog applications, such as signal amplification, filters, comparators, integrators and other circuit designs that require amplification functions.


lm358 application notes

lm358 ic Main features:

  • Dual op amp: LM358 has two independent operational amplifiers inside, which can process two signal channels simultaneously.
  • Wide power supply range:

Single power supply mode: 3V to 32V

Dual power supply mode: ±1.5V to ±16V

  • Low power consumption: Relatively low power consumption, very suitable for battery-powered applications.
  • Open-loop gain: Up to 100dB open-loop gain.
  • Low input bias current: Typical value is 45nA.
  • Wide bandwidth: Unity gain bandwidth is typically 1 MHz.
  • Output swing close to ground: The output voltage can be close to the negative end of the power supply (i.e. zero voltage), which is particularly suitable for single power supply operation.


lm358 chip Pin function:

OUT A: Output of op amp A.

IN A-: Inverting input of op amp A.

IN A+: Non-inverting input of op amp A.

Vee: Negative power supply (ground or negative voltage).

IN B+: Non-inverting input of op amp B.

IN B-: Inverting input of op amp B.

OUT B: Output of op amp B.

Vcc: Positive power supply.


lm358 pinout

ic lm358 pin diagram



lm358 op amp Common applications:

Signal amplifier: used to amplify small signals to a higher level.

Voltage comparator: used to compare the size of two voltages.

Filter: combined with resistors and capacitors can be used to build active filters.

Integrators and differentiators: common operational circuits in control systems and signal processing.


How to use op amp lm358

LM358 IC (Dual comparator) Basic Electronics



Operational amplifier basic properties explained using LM358 dual op amp



lm358 datasheet

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