MAX98357 I2S Audio Amplifier Module

The MAX98357 Module is a powerful and efficient mono Class D amplifier with digital audio input via I2S, making it ideal for modern embedded audio applications. With its compact size and high-efficiency performance, it allows you to easily add high-quality sound output to microcontrollers like the ESP32, Raspberry Pi, or Arduino.

Key Features

• Digital Audio Interface (I2S): Direct connection to I2S-capable microcontrollers—no DAC required.
• Class D Amplification: High-efficiency output with minimal heat generation.
• Mono Output: Delivers up to 2Wof audio power into a 4Ω speaker (at 5V).
• Low THD+N: Delivers clean audio with minimal distortion.
• Automatic Clock Detection: Supports various I2S sample rates without configuration.
• Tiny, Breadboard-Friendly Design: Easy to integrate into compact or portable projects.

Technical Specifications

• Amplifier Type: Mono Class D
• Input: I2S digital audio
• Output Power: Up to 3.2W @ 5V into 4Ω speaker
• Operating Voltage: 2.5V – 5.5V DC
• THD+N: < 0.1%
• Efficiency: Up to 92%
• I2S Sample Rates Supported: 8kHz to 96kHz
• Output Load: 3Ω – 8Ω speakers
• Dimensions: 18mm x 19mm

Applications

• Voice assistants and smart speakers
• IoT audio feedback systems
• MP3/music playback in DIY projects
• Talking devices and robots
• Educational and STEM kits
• Portable sound systems or alarms