MAX98357 I2S 3W Class D Audio Amplifier Module

The MAX98357 I2S 3W Class D Audio Amplifier Module is a compact and efficient digital audio amplifier designed for microcontrollers with I2S audio output, such as ESP32, Raspberry Pi, and Arduino. It directly converts digital I2S audio data into a clear, powerful mono output that can drive small speakers up to 3 watts (4–8Ω), making it ideal for DIY audio, voice playback, and smart device applications.

This amplifier module is based on the MAX98357A IC, a low-distortion, high-efficiency Class D audio amplifier that eliminates the need for a digital-to-analog converter (DAC). By using the I2S interface, it minimizes noise and ensures a pure digital audio signal path. With its low total harmonic distortion (THD) and high signal-to-noise ratio (SNR), this module delivers rich, clear sound even at high volume levels.

Operating at 3.3V to 5V, the MAX98357 module is fully compatible with ESP32, Raspberry Pi Pico, Teensy, and other microcontrollers that support I2S communication. The onboard pins — LRC, BCLK, DIN, GND, and VIN — allow for easy connection and integration into embedded audio projects.

Its small form factor, thermal efficiency, and minimal external components make it ideal for portable devices, voice assistants, IoT speakers, and embedded sound systems. Whether you are building a smart assistant, sound notification system, or music-playing gadget, this module ensures reliable and crisp audio output.

Get your MAX98357 I2S 3W Class D Audio Amplifier Module today from eleberric.com, Sri Lanka’s trusted online store for Arduino audio modules, IoT components, and electronic development boards.

Specification

• Model: MAX98357 I2S 3W Class D Amplifier Module

• Operating Voltage: 3.3V to 5V DC

• Output Power: 3W (4Ω load)

• Audio Interface: I2S (Digital Input)

• Channels: Mono

• Frequency Response: 60Hz – 20kHz

• Efficiency: Up to 90%

• Signal-to-Noise Ratio (SNR): > 100 dB

• Dimensions: Approx. 18mm × 19mm × 5mm

Key Features

• Digital I2S input for high-quality audio playback

• 3W Class D amplifier with low distortion

• No DAC required — direct I2S to speaker output

• High efficiency and compact size

• Supports 4Ω–8Ω speakers

• Thermal overload and short-circuit protection

• Compatible with ESP32, Raspberry Pi, Teensy, and Arduino

• Low noise and clear mono sound output

Applications

• IoT voice assistants and smart home devices

• ESP32-based audio streaming and MP3 playback

• Portable Bluetooth speaker projects

• Embedded sound systems and smart toys

• Voice alert and notification systems

• Educational and DIY electronics projects