What is the working principle of LM358 Master come!

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LM358 is a very high-grade dual-operation amplifier circuit. LM358 is not only extremely stable, but also cheap, and can be called inexpensive.

The structure of this chip is composed of two independent high-gain operational amplifiers.

The circuit can operate from a single supply voltage range of 3V to 32V, or it can operate independently under dual supply conditions and has internal frequency compensation. The circuit is used in household appliances and equipment, as well as in industrial automation.

It has a very wide range of applications in the field of opto-mechanical integration.

The LM358 is a dual operational amplifier. It includes two independent, high-gain, internal frequency-compensated operational amplifiers for single-supply use with a wide range of supply voltages, as well as dual-supply operation where the supply current is independent of the supply voltage under recommended operating conditions. It can be used in sensing amplifiers, DC gain modules, and all other applications where operational amplifiers can be operated from a single supply.

Real-world application: Infrared detection alarm.

The alarm can detect the infrared rays emitted by the human body, and when a person enters the monitoring area of the alarm, it can send out an alarm sound, which is suitable for anti-theft alarms in homes, offices, warehouses, laboratories and other important occasions.

The LM358 low-power dual op amp consists of two independent high-gain voltage comparators that can operate from a single or dual supply, and their current is not affected by the amplitude of the supply voltage. The LM358, a low-power dual operational amplifier in an SOP-8 package, is widely used in audio amplifiers, industrial control, DC gain, and all conventional arithmetic amplification circuits.

The LM358 low-power dual operational amplifier pinout diagram is shown in the figure below

LM358 pinout.

As you can see from the figure, LM358 has 8 legs, which represent the following meanings:

Pin sequence number 1: out1 Comparator 1 output.

Pin No. 2: in1- Comparator 1 inverted input.

Pin sequence number 3: 1n+ comparator 1 positive phase input.

Pin No. 4: GND ground.

Pin No. 5: in2+ Comparator 2 normal-phase input.

Pin No. 6: 1N2 - Comparator 2 inverted input.

Pin No. 7: Out2 Comparator 2 output.

Pin No. 8: VCC power supply.

LM358 polarity parameters.

LM358 electrical parameters.