MAX4281ESA-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: Low Noise, High Output Drive Capability
• Package: 8-Pin SOIC (Small Outline Integrated Circuit)
• Essence: Single Supply, Rail-to-Rail Operational Amplifier
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Input Offset Voltage: ±0.5mV (maximum)
• Gain Bandwidth Product: 10MHz
• Slew Rate: 4V/µs
• Input Bias Current: ±1nA (maximum)
• Output Current: ±40mA (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX4281ESA-T has the following pin configuration:

```

---

| | --| V+ OUT |-- Pin 1: Positive Power Supply (V+) --| IN- NC |-- Pin 2: Inverting Input (-) --| IN+ GND |-- Pin 3: Non-Inverting Input (+) / Ground (GND) --| NC NC |-- Pin 4: Not Connected (NC) --| NC NC |-- Pin 5: Not Connected (NC) --| NC NC |-- Pin 6: Not Connected (NC) --| NC NC |-- Pin 7: Not Connected (NC) --| V- NC |-- Pin 8: Negative Power Supply (V-) |___________| ```

Functional Features

• Rail-to-Rail Input and Output Operation
• Low Input Offset Voltage and Bias Current
• High Output Drive Capability
• Unity-Gain Stable
• Low Distortion and Noise

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for flexibility in power source selection. - Rail-to-rail operation enables maximum utilization of the available voltage range. - Low input offset voltage and bias current ensure accurate signal amplification. - High output drive capability allows for driving low impedance loads. - Unity-gain stable, eliminating the need for external compensation components.

Disadvantages: - Limited number of pins restricts the availability of additional features. - Not suitable for applications requiring high voltage operation.

Working Principles

The MAX4281ESA-T is a single-supply operational amplifier designed for audio amplification applications. It operates from a wide supply voltage range of 2.7V to 5.5V, making it suitable for battery-powered devices. The rail-to-rail input and output operation allows the amplifier to accept and deliver signals close to the supply rails, maximizing dynamic range.

The low input offset voltage and bias current ensure accurate amplification of audio signals with minimal distortion. The high output drive capability enables the amplifier to drive low impedance loads, such as headphones or speakers, without significant loss in signal quality.

The unity-gain stability of the MAX4281ESA-T eliminates the need for external compensation components, simplifying circuit design and reducing component count.

Detailed Application Field Plans

The MAX4281ESA-T is commonly used in various audio applications, including:

1. Portable Audio Devices: Provides high-quality audio amplification for portable media players, smartphones, and tablets.
2. Headphone Amplifiers: Drives headphones with low impedance, delivering clear and powerful sound.
3. Audio Mixers: Amplifies audio signals in mixing consoles, ensuring accurate reproduction of multiple audio sources.
4. Home Theater Systems: Enhances audio performance in surround sound systems, delivering immersive sound experiences.
5. Automotive Audio Systems: Amplifies audio signals in car audio systems, providing high-fidelity sound reproduction.

Detailed and Complete Alternative Models

1. MAX4280ESA-T: Similar to MAX4281ESA-T but with a lower gain bandwidth product of 5MHz.
2. MAX4282ESA-T: Similar to MAX4281ESA-T but with a higher gain bandwidth product of 20MHz.
3. MAX4283ESA-T: Similar to MAX4281ESA-T but with a shutdown feature for power-saving applications.

These alternative models offer different performance characteristics and can be chosen based on specific application requirements.

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