LM2902 Op-Amp: Where & How to Use LM2902?

Pinout

PCB Symbol

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3D Model

The LM2902 Op-Amp is a low-cost, high-Performance Quadruple Operational Amplifier, i.e. it consists of four independent high-gain frequency-compensated operational amplifiers that are designed specifically to operate from a single supply or split supply over a wide range of voltages. This circuit consists of four independent, high-gain operational amplifiers (op amps) which employ internal frequency compensation and are specifically designed for automotive and industrial control systems. The device operates from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low-power supply current drain is independent from the power supply voltage magnitude.

This article provides you with a basic overview of the LM2902 Op-Amp, including its pin descriptions, features and specifications, etc., to help you quickly understand what LM2902 is.

● Wide gain bandwidth: 1.3 MHz

● Input common-mode voltage range includes negative rail

● Large voltage gain: 100 dB

● Supply current per amplifier: 375 µA

● Low input bias current: 20 nA

● Low input offset current: 2 nA

● Wide power supply range:

   ◆ Single supply: 3 V to 30 V

   ◆ Dual supplies: ± 1.5 V to ± 15 V

Schematic diagram (1/4 LM2902)

The LM2902 is a Quad Package Operational Amplifier, meaning it has four Op-Amps inside it and each Op-Amp can be used independently. The LM2902 series consists of four independent, high-gain, internally frequency compensated operational amplifiers designed to operate from a single power supply over a wide range of voltages. Operation from split-power supplies is also possible and the low-power supply current drain is independent of the magnitude of the power supply voltage.

Application areas include transducer amplifiers, DC gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. For example, the LM2902 series can directly operate off of the standard 5-V power supply voltage which is used in digital systems and easily provides the required interface electronics without requiring the additional ±15 V power supplies.

We can use this IC for audio pre-amplification, basic comparator, adder, and subtractor devices.

In the above circuit, the LM2902 Op-amp is configured as a non-inverting configuration. The gain of the op-amp is set to 10. For that, we have used a 1K resistor and a 9.1K resistor, as you can see for the simulation, we have used a variable potentiometer. By varying the potentiometer, we can vary the input voltage and the output voltage will also vary, to power the op-amp, we have used +12V and -12V supply, as the gain of the op-amp is 10, so if we provide 1V at the input, we will get 10V at the output, the simulated circuit shows exactly that.

● Blu-ray Players and Home Theatres

● Chemical and Gas Sensors

● DVD Recorders and Players

● Digital Multimeter: Bench a. Systems

● Digital Multimeter: Handhelds

● Transducer Amplifiers

● DC Gain Blocks

● Conventional Op Amp Circuits

TSSOP14 Package Outline

Package Pin Connections (top view)

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