MAX9711ETC+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio Amplifier
• Characteristics: High Efficiency, Low Noise, Small Package Size
• Package: TDFN-12
• Essence: Class D Audio Amplifier
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Output Power: 2.8W at 5V, 4Ω Load, 10% THD+N
• Efficiency: Up to 87%
• Shutdown Current: <1µA
• Total Harmonic Distortion + Noise (THD+N): 0.04% at 1kHz, 1.4W, 4Ω Load
• Signal-to-Noise Ratio (SNR): 100dB A-weighted
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX9711ETC+T has a total of 12 pins arranged as follows:

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| | | 1 6 12| | | | 2 5 11| | | | 3 4 10| |_______________| ```

Pin Description:

1. SHDN: Shutdown Input
2. GND: Ground
3. IN+: Positive Input
4. IN-: Negative Input
5. VDD: Power Supply
6. BYP: Bypass Capacitor Connection
7. OUT: Speaker Output
8. FB: Feedback Input
9. PGND: Power Ground

Functional Features

• Class D Amplification: The MAX9711ETC+T is a class D audio amplifier, which offers high efficiency and low power dissipation.
• Low Noise: The amplifier provides a high signal-to-noise ratio of 100dB A-weighted, ensuring clear audio reproduction.
• Small Package Size: The TDFN-12 package allows for compact designs, making it suitable for space-constrained applications.
• Shutdown Mode: The SHDN pin enables the amplifier to enter a low-power shutdown mode, consuming less than 1µA of current.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption. - Low noise ensures high-quality audio output. - Small package size allows for flexible integration in various devices. - Shutdown mode helps conserve power when not in use.

Disadvantages: - Limited output power compared to higher wattage amplifiers. - Requires an external bypass capacitor for optimal performance.

Working Principles

The MAX9711ETC+T is a class D audio amplifier that utilizes pulse-width modulation (PWM) to convert the input audio signal into a high-frequency square wave. This square wave is then filtered and amplified to drive the connected speaker. The class D amplification technique ensures high efficiency by minimizing power dissipation.

When an audio signal is present, the MAX9711ETC+T amplifies it and delivers it to the speaker. In the absence of an audio signal, the amplifier can be put into shutdown mode using the SHDN pin, reducing power consumption to negligible levels.

Detailed Application Field Plans

The MAX9711ETC+T is commonly used in various portable audio devices, such as:

1. Mobile Phones: Enhances the audio output quality of smartphones and feature phones.
2. Portable Media Players: Provides improved sound amplification for music players and multimedia devices.
3. Tablets and Laptops: Enables better audio performance in portable computing devices.
4. Bluetooth Speakers: Amplifies the audio signal for wireless speakers, enhancing the overall sound experience.

Detailed and Complete Alternative Models

1. MAX9712ETC+T: Similar to MAX9711ETC+T, but with higher output power capability.
2. MAX98357AETE+T: Class D audio amplifier with integrated digital-to-analog converter (DAC).
3. TPA3116D2PWPR: Class D audio amplifier with built-in audio processing features.

These alternative models offer similar functionality and can be considered as alternatives to the MAX9711ETC+T based on specific application requirements.

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