{"title":"Adafruit I2S 3W Class D Amplifier Breakout - MAX98357A","handle":"adafruit-i2s-3w-class-d-amplifier-breakout-max98357a","url":"/products/adafruit-i2s-3w-class-d-amplifier-breakout-max98357a","description":"The Adafruit MAX98357A I2S Class D Amplifier Breakout is an all-in-one digital audio solution that decodes I2S audio and amplifies it directly to a speaker — no separate DAC required. Delivering up to 3.2W into a 4Ω speaker, it's a compact and efficient way to add amplified sound to your Raspberry Pi, Arduino Zero, or any microcontroller with I2S output.\n\nThe Class D amplifier design is highly efficient, running from 2.7V to 5.5V DC — perfect for portable and battery-powered projects. It accepts 3.3V or 5V logic I2S input and supports sample rates from 8 kHz to 96 kHz with no MCLK required.\n\nKey Features\n\n\n3.2W Output Power – Drives 4Ω speakers at up to 3.2W (5V supply, 10% THD) or 1.8W into 8Ω\n\nI2S Digital Audio Input – Accepts standard I2S with 3.3V or 5V logic, no separate DAC needed\n\nClass D Efficiency – Highly efficient amplifier ideal for battery-powered projects\n\nAdjustable Gain – Five pin-selectable gain levels: 3 dB, 6 dB, 9 dB (default), 12 dB, and 15 dB\n\nMono Channel Selection – Outputs stereo mix (L+R)/2 by default; configurable for left-only or right-only\n\nWide Sample Rate Support – 8 kHz to 96 kHz, no MCLK required\n\nBuilt-in Protection – Thermal shutdown and over-current protection\n\nClick & Pop Suppression – Clean audio transitions with minimal artefacts\n\n77 dB PSRR – Excellent power supply rejection at 1 kHz\n\n\nIdeal For\n\nRaspberry Pi audio projects and media players\nPortable and battery-powered sound systems\nArduino Zero and other I2S-capable microcontroller projects\nCompact amplified audio where space is limited\n\n\nPackage Contents\n\n1× Adafruit MAX98357A I2S Amplifier Breakout (assembled and tested)\n1× 0.1\" Header Strip\n1× 3.5 mm Terminal Block\n\n\n\nNote: The terminal block included may be blue or black. The bridge-tied output connects directly to the speaker — do not connect the output to another amplifier or to ground. Some soldering is required to attach the header and terminal block.\n\n\nResources\n\nAdafruit MAX98357A I2S Amp Guide\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11656,"title":"Default Title","sku":"AF-3006","price":12.51,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}