{"product_id":"max98357a-i2s-class-d-amplifier-module-stereo-pcm-input-1","title":"MAX98357A I2S Class D Amplifier Module – Stereo PCM Input","description":"\u003ch2\u003eMAX98357A I2S Class D Amplifier Module – Stereo PCM Input\u003c\/h2\u003e\n\u003cp\u003eUpgrade your audio project with the \u003cstrong\u003eMAX98357A Class D Amplifier Module\u003c\/strong\u003e, a compact and highly efficient digital audio amplifier designed for makers, engineers, and audio enthusiasts alike. Featuring an \u003cstrong\u003eI2S (Inter-IC Sound) digital audio interface\u003c\/strong\u003e and supporting \u003cstrong\u003eStereo PCM input\u003c\/strong\u003e, this module delivers clean, crisp audio output with minimal power consumption — making it ideal for Raspberry Pi, Arduino, ESP32, and other microcontroller-based audio builds.\u003c\/p\u003e\n\n\u003cp\u003eMeasuring just \u003cstrong\u003e23 × 20 mm\u003c\/strong\u003e, this tiny powerhouse punches well above its size. Available in \u003cstrong\u003e3 color options\u003c\/strong\u003e, it fits seamlessly into compact enclosures and DIY builds. Whether you're building a smart speaker, a media player, a home automation audio node, or any embedded audio system, this module is your go-to solution.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIC:\u003c\/strong\u003e MAX98357A Class D Amplifier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio Interface:\u003c\/strong\u003e I2S (Inter-IC Sound) digital input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Format:\u003c\/strong\u003e Stereo PCM \/ TDM (up to 8-channel TDM support)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e Single-ended speaker output, up to 3.2W into 4Ω at 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e High-efficiency Class D design reduces heat and extends battery life in portable builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e 23 × 20 mm — easy to integrate into tight spaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Built-in Battery:\u003c\/strong\u003e Requires external power supply (3V–5.5V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 3 color options\u003c\/strong\u003e to match your build aesthetic\u003c\/li\u003e\n  \u003cli\u003eNew and high quality — ready to use right out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is I2S and Why Does It Matter?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eI2S (Inter-IC Sound)\u003c\/strong\u003e protocol is a serial bus interface standard used to connect digital audio devices. Unlike analog audio connections, I2S transmits audio digitally, resulting in a cleaner signal with no analog noise pickup. The MAX98357A decodes this digital signal directly, driving your speakers with exceptional fidelity and efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRaspberry Pi (Zero, 3, 4, 5)\u003c\/li\u003e\n  \u003cli\u003eArduino boards\u003c\/li\u003e\n  \u003cli\u003eESP32 \/ ESP8266\u003c\/li\u003e\n  \u003cli\u003eSTM32 and other ARM microcontrollers\u003c\/li\u003e\n  \u003cli\u003eAny microcontroller with an I2S output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY smart speakers and voice assistants\u003c\/li\u003e\n  \u003cli\u003eEmbedded audio and media players\u003c\/li\u003e\n  \u003cli\u003eHome automation audio nodes\u003c\/li\u003e\n  \u003cli\u003eIoT audio projects\u003c\/li\u003e\n  \u003cli\u003ePrototyping and educational electronics builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e MAX98357A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmplifier Class:\u003c\/strong\u003e Class D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e I2S\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e Stereo PCM \/ 8-Channel TDM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3V – 5.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Power:\u003c\/strong\u003e Up to 3.2W @ 4Ω \/ 5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 23 × 20 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in Battery:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on audio interface standards used in embedded electronics, visit the \u003ca href=\"https:\/\/www.nist.gov\/\" 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 Class D Amplifier Module and what does it do?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX98357A is a compact, high-efficiency Class D digital audio amplifier module that accepts I2S (Inter-IC Sound) stereo PCM digital audio input and drives a speaker directly. It is widely used in DIY audio projects, smart speakers, Raspberry Pi builds, and embedded media players. It supports up to 3.2W output power and 8-channel TDM input.\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 MAX98357A I2S amplifier module is fully compatible with Raspberry Pi (all models with GPIO), Arduino boards, ESP32, ESP8266, STM32, and virtually any microcontroller that supports the I2S digital audio protocol. Simply connect the BCLK, LRCLK (WS), and DIN pins to your microcontroller's I2S output pins and supply 3V–5.5V power.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the module require a battery or external power supply?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX98357A module does not have a built-in battery. It requires an external power supply in the range of 3V to 5.5V DC. For best performance and maximum output power, a 5V power supply is recommended.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What speaker impedance is recommended for this amplifier module?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX98357A Class D amplifier is optimized for use with 4Ω or 8Ω speakers. It delivers up to 3.2W into a 4Ω load at 5V, making it suitable for small to medium speakers used in portable or desktop audio applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is TDM support on the MAX98357A module?\u003c\/h4\u003e\n\u003cp\u003eA: TDM stands for Time Division Multiplexing. The MAX98357A supports up to 8-channel TDM input over the I2S interface, allowing multiple audio channels to be transmitted simultaneously on a single data line — ideal for more complex multi-channel audio systems and advanced embedded audio projects.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the MAX98357A Class D Amplifier Module and what does it do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The MAX98357A is a compact, high-efficiency Class D digital audio amplifier module that accepts I2S (Inter-IC Sound) stereo PCM digital audio input and drives a speaker directly. It is widely used in DIY audio projects, smart speakers, Raspberry Pi builds, and embedded media players. 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