I²S Audio Amplifier (MAX98357A)

Drive speakers directly from your microcontroller with this powerful I²S audio amplifier. The MAX98357A delivers 3.2W into 4Ω or 1.8W into 8Ω speakers, perfect for adding clear audio output to voice projects, music players, or notification systems. Just send digital audio over I²S and the amplifier handles everything else, including DAC conversion and filtering. Gain can be adjusted via jumper pads (3dB, 6dB, 9dB, 12dB, or 15dB), with 9dB set by default. You can also configure stereo mode by selecting left or right channel, though it defaults to mono for simpler single-speaker setups. Two screw terminals make speaker connection straightforward. Drop it into any backplane and start playing audio with Arduino IDE, MicroPython, or MicroBlocks. Use it standalone with any microcontroller, or snap it into the Genesis Modular system from Axiometa for plug-and-play integration. Works with Arduino IDE, MicroPython, or MicroBlocks.

- 22 mm × 22 mm Board
- 4× ⌀2.7 mm Mounting Holes
- MAX98357A Class-D Amplifier
- 3.2 W into 4Ω / 1.8 W into 8Ω
- I²S Digital Audio Input
- Onboard Speaker Terminal
- 3.3 V, 5.0 V Compatible
- Arduino IDE Compatible
- MicroPython Compatible
- MicroBlocks Compatible

Material Datasheet
Circuit Schematic
3D Model (STEP)
Pinout Diagram