LM258N

Product Overview

Category: Integrated Circuit (IC)

Use: LM258N is a dual operational amplifier that is widely used in various electronic circuits for amplification, filtering, and signal conditioning purposes.

Characteristics: - Low input offset voltage - Low input bias current - High open-loop gain - Wide supply voltage range - Rail-to-rail output swing capability

Package: LM258N is available in a standard 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of LM258N lies in its ability to provide high-performance operational amplification with low power consumption and a compact form factor.

Packaging/Quantity: LM258N is typically sold in reels or tubes containing a quantity of 50 or 100 units per package.

Specifications

• Supply Voltage Range: ±2V to ±18V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 20nA (maximum)
• Open-Loop Gain: 100dB (typical)
• Output Swing: Rail-to-Rail
• Slew Rate: 0.3V/µs (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

LM258N has a total of 8 pins, which are assigned specific functions as follows:

1. Non-Inverting Input (Op-Amp A)
2. Inverting Input (Op-Amp A)
3. V- (Negative Power Supply)
4. V+ (Positive Power Supply)
5. Offset Null (Op-Amp A)
6. Output (Op-Amp A)
7. Non-Inverting Input (Op-Amp B)
8. Inverting Input (Op-Amp B)

Functional Features

• Dual Operational Amplifier: LM258N consists of two independent operational amplifiers, allowing for simultaneous processing of two different input signals.
• Low Input Offset Voltage: The low input offset voltage ensures accurate amplification and minimal distortion in the output signal.
• Wide Supply Voltage Range: LM258N can operate within a wide range of supply voltages, making it suitable for various applications.
• Rail-to-Rail Output Swing: The output swing capability enables the amplifier to provide maximum voltage range without distortion.

Advantages and Disadvantages

Advantages: - High open-loop gain ensures precise amplification. - Low power consumption makes it suitable for battery-powered devices. - Compact package size allows for space-efficient circuit design. - Rail-to-rail output swing provides maximum signal range.

Disadvantages: - Limited bandwidth compared to specialized amplifiers. - May require additional external components for specific applications. - Not suitable for high-frequency applications due to limited slew rate.

Working Principles

LM258N operates based on the principles of operational amplifiers. It amplifies the difference between the voltages applied to its inputs and produces an output voltage proportional to this difference. The internal circuitry of LM258N ensures stability, accuracy, and reliable performance.

Detailed Application Field Plans

LM258N finds extensive application in various fields, including but not limited to: 1. Audio Amplification: LM258N can be used in audio amplifiers to enhance the volume and quality of sound signals. 2. Signal Conditioning: It is employed in signal conditioning circuits to filter, amplify, or modify signals before further processing. 3. Sensor Interface: LM258N can interface with sensors to amplify weak signals and improve their reliability. 4. Active Filters: It is utilized in active filter circuits to shape the frequency response of signals. 5. Instrumentation Systems: LM258N plays a crucial role in instrumentation systems where accurate signal amplification is required.

Detailed and Complete Alternative Models

Some alternative models to LM258N that offer similar functionality are: - LM358: A single operational amplifier with similar characteristics as LM258N. - TL072: A dual operational amplifier with low noise and high slew rate. - AD822: A precision dual operational amplifier with low input offset voltage.

These alternative models can be considered based on specific requirements and design constraints.

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