MAX98357 I2S Class D Audio Amplifier Module

Add a small speaker-output stage to a digital audio project. This MAX98357/MAX98357A breakout combines an I2S input with a compact class-D amplifier format.

✅ Turn supported digital audio into speaker output - The module provides the conversion and amplifier stage for a matched speaker.

✅ Connect to a compatible controller's audio interface - I2S gives the project a digital signal route to the amplifier.

✅ Choose boards for one or several builds - One- and four-piece options let you plan the required quantity.

Build the Audio Chain Around the Speaker

A microcontroller audio project needs the signal source, amplifier, speaker and power supply to work together. Check the I2S configuration and choose a speaker load within the module's operating limits.

The 3W-class description depends on the supply, load and distortion conditions. This is an amplifier board, not a complete player or speaker. Confirm the actual breakout pinout and gain arrangement before wiring.

Technical details

• MAX98357/MAX98357A I2S amplifier
• Class-D output
• 2.5-5.5V supply specification
• 8-96kHz sample-rate description
• One/four-board options
• Speaker, controller and supply separate

Match the audio and power requirements and add a speaker stage to your project.