LM258QT

Product Overview

Category: Integrated Circuit (IC)

Use: LM258QT 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 gain bandwidth product - Wide supply voltage range - Rail-to-rail output swing capability

Package: LM258QT is available in a small outline package (SOIC) with 14 pins.

Essence: The essence of LM258QT lies in its ability to provide high-performance operational amplification in a compact and versatile package.

Packaging/Quantity: LM258QT is typically sold in reels or tubes containing a specified quantity of ICs, usually ranging from 100 to 1000 units per package.

Specifications

LM258QT exhibits the following specifications:

• Supply Voltage Range: ±2V to ±18V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 20nA (maximum)
• Gain Bandwidth Product: 1MHz (typical)
• Slew Rate: 0.3V/µs (typical)
• Common Mode Rejection Ratio: 70dB (typical)
• Output Current: 40mA (maximum)

Pin Configuration

The pin configuration of LM258QT is as follows:

```

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| | --| V+ OUT |-- Pin 1: Positive Power Supply (+Vcc) --| IN- IN+ |-- Pin 2: Non-Inverting Input --| V- GND |-- Pin 3: Negative Power Supply (-Vcc) --| OUT IN- |-- Pin 4: Inverting Input --| IN+ OUT |-- Pin 5: Output |___________| ```

Functional Features

The functional features of LM258QT include:

1. Low Input Offset Voltage: The low input offset voltage ensures accurate amplification and minimal distortion in the output signal.

2. Wide Supply Voltage Range: LM258QT can operate over a wide range of supply voltages, making it suitable for various applications.

3. Rail-to-Rail Output Swing Capability: The rail-to-rail output swing capability allows the amplifier to provide maximum voltage range at the output, minimizing signal clipping.

4. High Gain Bandwidth Product: With a high gain bandwidth product, LM258QT can handle higher frequency signals without significant loss in amplification.

Advantages and Disadvantages

Advantages: - Low input offset voltage ensures accurate amplification - Wide supply voltage range allows versatile usage - Rail-to-rail output swing capability minimizes signal distortion - High gain bandwidth product enables handling of higher frequency signals

Disadvantages: - Limited output current may restrict certain high-power applications - Relatively low slew rate may limit response time in some applications

Working Principles

LM258QT operates based on the principles of operational amplifiers. It utilizes differential inputs to amplify the voltage difference between the non-inverting and inverting inputs. The amplified output is then fed back to the inputs through a feedback network, allowing precise control over the gain and characteristics of the circuit.

Detailed Application Field Plans

LM258QT finds extensive application in various fields, including but not limited to:

1. Audio Amplification: LM258QT can be used in audio amplifiers to enhance the sound quality and volume of audio signals.
2. Sensor Signal Conditioning: It is employed in sensor circuits to amplify and condition weak sensor signals for further processing.
3. Active Filters: LM258QT can be utilized in active filter circuits to achieve precise filtering of specific frequency ranges.
4. Instrumentation Amplifiers: It is suitable for building instrumentation amplifiers used in measurement and control systems.

Detailed and Complete Alternative Models

Some alternative models to LM258QT that offer similar functionality and characteristics include:

1. LM358: A single operational amplifier with comparable specifications.
2. TL072: A dual operational amplifier with higher slew rate and wider bandwidth.
3. AD822: A precision operational amplifier with low noise and high common mode rejection ratio.

These alternative models can be considered based on specific application requirements and desired performance characteristics.

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