{"product_id":"max98357a-i2s-class-d-amplifier-module-stereo-pcm-input","title":"MAX98357A I2S Class D Amplifier Module – Stereo PCM \u0026 TDM","description":"\n\u003ch2\u003eMAX98357A I2S Class D Amplifier Module – Stereo PCM Input\u003c\/h2\u003e\n\u003cp\u003eTake your DIY audio projects to the next level with the \u003cstrong\u003eMAX98357A Class D Amplifier Module\u003c\/strong\u003e. Featuring an I2S digital audio interface and stereo PCM input, this compact breakout board delivers clean, efficient audio output in a tiny \u003cstrong\u003e23 × 20 mm\u003c\/strong\u003e footprint — perfect for Raspberry Pi, Arduino, ESP32, and other microcontroller-based audio builds.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass D Amplifier:\u003c\/strong\u003e High-efficiency switching amplifier design minimizes heat and maximizes battery or supply life in portable and embedded applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI2S Digital Audio Input:\u003c\/strong\u003e Accepts standard I2S (Inter-IC Sound) PCM data for a clean, noise-free digital signal path direct from your microcontroller or SBC.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStereo PCM Support:\u003c\/strong\u003e Handles stereo audio streams with precision, supporting standard sample rates for high-fidelity playback.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8-Channel TDM Capability:\u003c\/strong\u003e Time-Division Multiplexed (TDM) support allows multi-channel audio configurations for advanced projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e At just 23 × 20 mm, this module fits neatly into enclosures, breadboards, and custom PCB assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 3 Variants:\u003c\/strong\u003e Choose from 3 configuration options to best suit your circuit design requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Built-in Battery:\u003c\/strong\u003e Powered directly from your project's supply rail — no battery management complexity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Integration:\u003c\/strong\u003e Clearly labeled pins and standard 2.54 mm pitch headers make wiring fast and straightforward.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRaspberry Pi \/ ESP32 \/ Arduino audio output stages\u003c\/li\u003e\n  \u003cli\u003eDIY Bluetooth speakers and smart home audio devices\u003c\/li\u003e\n  \u003cli\u003eEmbedded voice assistant speaker drivers\u003c\/li\u003e\n  \u003cli\u003eMulti-channel TDM audio experiments and prototyping\u003c\/li\u003e\n  \u003cli\u003ePortable media players and intercom systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChip\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMAX98357A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAudio Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eI2S (PCM)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannel Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStereo + 8-Channel TDM\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 × 20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuilt-in Battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVariants\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhy Choose the MAX98357A Module?\u003c\/h3\u003e\n\u003cp\u003eThe MAX98357A is a well-regarded, widely adopted amplifier IC trusted by hobbyists and engineers worldwide. Its fully digital I2S input eliminates analog noise, while the Class D topology keeps power dissipation low — making it ideal for battery-powered and thermally constrained designs. Whether you're building a smart speaker, a voice interface, or a multichannel audio controller, this module delivers the performance and flexibility you need.\u003c\/p\u003e\n\n\u003cp\u003eFor more technical background on digital audio interfaces and embedded electronics safety standards, visit the \u003ca href=\"https:\/\/www.nist.gov\/electronics\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNational Institute of Standards and Technology (NIST)\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the MAX98357A I2S Class D Amplifier Module used for?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX98357A module is a compact digital audio amplifier breakout board designed for DIY electronics projects. It accepts I2S stereo PCM audio input and drives speakers directly, making it ideal for use with Raspberry Pi, ESP32, Arduino, and similar microcontroller or single-board-computer platforms. It supports 8-channel TDM for advanced multi-channel audio applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the MAX98357A module compatible with Raspberry Pi and Arduino?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The module uses the standard I2S digital audio interface supported natively by Raspberry Pi, ESP32, and many Arduino variants. Simply connect the BCLK, LRCLK, and DIN pins to the corresponding I2S pins on your board, supply power, and configure your software audio driver to output I2S audio.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does \"Class D amplifier\" mean and why does it matter?\u003c\/h4\u003e\n\u003cp\u003eA: A Class D amplifier uses high-frequency switching to drive the speaker, achieving efficiency ratings of 85–95% compared to 50–70% for traditional linear amplifiers. This means less heat generated, lower power draw, and longer battery life in portable designs — key advantages for embedded audio builds.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is TDM (Time-Division Multiplexing) in audio?\u003c\/h4\u003e\n\u003cp\u003eA: TDM is a protocol that allows multiple audio channels to be transmitted over a single I2S data line by assigning each channel a specific time slot. The MAX98357A's 8-channel TDM support makes it suitable for surround sound, multi-zone audio, or complex embedded audio system designs.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the MAX98357A I2S Class D Amplifier Module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The MAX98357A module is a compact digital audio amplifier breakout board designed for DIY electronics projects. 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