MAX98357 I2S 3Watt class D audio decoder amplifier module

The MAX98357 is a compact, digital-input Class D audio power amplifier that combines an I2S digital-to-analog converter (DAC) with a mono amplifier. It takes digital audio directly from microcontrollers like the ESP32 or Raspberry Pi to drive a 3W speaker without needing a separate DAC.Key FeaturesDigital I2S Input: Eliminates noisy analog audio signals.Power Output: Delivers 3.2W into a 4Ω speaker at 5V.Voltage Range: Works with 2.5V to 5.5V DC supply.No DAC Needed: Direct connection from microcontrollers.High Efficiency: Class D operation keeps power loss low.Pinout & ConnectionsVIN: Power input (2.5V – 5.5V).GND: Ground connection.BCLK: Bit clock for I2S timing.LRC: Left/Right clock (Word Select).DIN: Digital audio data in.GAIN: Adjusts output gain (3dB to 15dB).SD: Shutdown and channel select (Left, Right, Mono).Quick Wiring GuideVIN -> 5V or 3.3V power sourceGND -> System GroundBCLK -> Microcontroller I2S Bit Clock pinLRC -> Microcontroller I2S Word Select / LRC pinDIN -> Microcontroller I2S Data output pinSpeaker -> Connect positive and negative speaker wires to OUT+ and OUT-