MAX987ESA-T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Audio Amplifier
• Characteristics: Low Noise, High Efficiency
• Package: 8-SOIC (Small Outline Integrated Circuit)
• Essence: Single Supply, Mono Class AB Amplifier
• Packaging/Quantity: Tape & Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 1.4W at 3.6V, 10% THD+N, 4Ω Load
• Total Harmonic Distortion + Noise (THD+N): 0.04% at 1kHz, 1.2W, 4Ω Load
• Quiescent Current: 2.5mA
• Shutdown Current: <1µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX987ESA-T has a total of 8 pins arranged as follows:

```

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| | --| VDD OUT |-- Pin 1: VDD (Power Supply) --| GND IN- |-- Pin 2: GND (Ground) --| SHDN IN+ |-- Pin 3: SHDN (Shutdown Control) --| BIAS FB |-- Pin 4: BIAS (Bias Voltage) --| BYP NC |-- Pin 5: BYP (Bypass Capacitor) --| AGND NC |-- Pin 6: AGND (Analog Ground) --| PGND NC |-- Pin 7: PGND (Power Ground) --| NC NC |-- Pin 8: Not Connected |___________| ```

Functional Features

• Single supply operation simplifies design and reduces component count
• Low noise and high efficiency for improved audio performance
• Shutdown control feature allows power saving when not in use
• Internal bias voltage generation eliminates the need for external components
• Bypass capacitor improves stability and reduces noise

Advantages and Disadvantages

Advantages: - Single supply operation simplifies circuit design - Low noise ensures high-quality audio output - High efficiency reduces power consumption - Shutdown control feature saves power when not in use

Disadvantages: - Limited output power compared to higher wattage amplifiers - Not suitable for applications requiring stereo output

Working Principles

The MAX987ESA-T is a mono class AB amplifier designed for audio applications. It operates on a single supply voltage ranging from 2.7V to 5.5V. The amplifier utilizes internal bias voltage generation, eliminating the need for external components.

The input signal is amplified by the internal circuitry and delivered to the output pin. The amplifier provides low noise and high efficiency, ensuring high-quality audio reproduction. The shutdown control feature allows the amplifier to enter a low-power state when not in use, reducing power consumption.

Detailed Application Field Plans

The MAX987ESA-T is commonly used in portable audio devices such as smartphones, tablets, and portable media players. Its low power consumption and small package make it ideal for battery-powered applications. The amplifier can be integrated into audio output stages of these devices to enhance audio quality and volume.

Detailed and Complete Alternative Models

1. MAX9867ETM+: Similar to MAX987ESA-T, but with stereo output capability.
2. MAX98357AETE+T: Class D audio amplifier with higher output power.
3. TPA3116D2PWPR: Class D audio amplifier with integrated digital-to-analog converter (DAC).

These alternative models offer different features and specifications, allowing designers to choose the most suitable amplifier for their specific application requirements.

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