{"product_id":"max98357a-i2s-3w-class-d-audio-amplifier-module","title":"MAX98357A I2S 3W Class-D Audio Amplifier Module","description":"\u003cp\u003eThe \u003cstrong\u003eMAX98357A\u003c\/strong\u003e is a mono 3W Class-D amplifier that takes \u003cstrong\u003eI2S digital audio directly\u003c\/strong\u003e — no separate DAC needed. It is the standard way to get sound out of an ESP32, ESP32-S3 or Raspberry Pi when the audio path is already digital.\u003c\/p\u003e\n\u003ch3\u003eWhy I2S rather than an analog amplifier\u003c\/h3\u003e\n\u003cp\u003eAn analog amplifier (such as a PAM8403) needs the microcontroller to produce an analog signal first, via its DAC or a PWM pin. The MAX98357A accepts the digital I2S stream straight from the controller, so the signal stays digital end to end — cleaner, and simpler to wire.\u003c\/p\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cp\u003eSeven pins: \u003cstrong\u003eLRC\u003c\/strong\u003e (word select), \u003cstrong\u003eBCLK\u003c\/strong\u003e (bit clock) and \u003cstrong\u003eDIN\u003c\/strong\u003e (data) are the three I2S lines, plus \u003cstrong\u003eVIN\u003c\/strong\u003e and \u003cstrong\u003eGND\u003c\/strong\u003e for power. \u003cstrong\u003eNo external MCLK is required.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTwo more are optional and can be left unconnected: \u003cstrong\u003eGAIN\u003c\/strong\u003e sets the output level (9dB by default), and \u003cstrong\u003eSD\u003c\/strong\u003e shuts the amplifier down or selects left\/right\/mono channel.\u003c\/p\u003e\n\u003cp\u003eThe speaker connects to the green two-pole screw terminal.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutput: 3W mono into 4Ω (Class-D)\u003c\/li\u003e\n\u003cli\u003eInterface: I2S digital audio input\u003c\/li\u003e\n\u003cli\u003eSupply: 2.5V – 5.5V\u003c\/li\u003e\n\u003cli\u003ePairs with: ESP32 \/ ESP32-S3 \/ ESP32-C3 \/ Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eTypical use: voice assistants, intercoms, sound playback, AI audio projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eCommonly paired with an INMP441 I2S MEMS microphone for a full digital audio in\/out path.\u003c\/em\u003e\u003c\/p\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53885278388589,"sku":"CDN-MAX98357A","price":310.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/max98357a-product.png?v=1788597577","url":"https:\/\/compoden.com\/products\/max98357a-i2s-3w-class-d-audio-amplifier-module","provider":"Compoden","version":"1.0","type":"link"}