{"product_id":"max98357a-i2s-3w-class-d-amplifier-breakout","title":"MAX98357A I2S 3W Class D Amplifier Breakout","description":"\u003cp\u003eAdd real, driven sound to your microcontroller project without a separate DAC and amp stage. The MAX98357A takes a standard I2S digital audio signal and decodes it directly into an amplified analog output, strong enough to drive a speaker on its own. It combines the job of two breakout boards (I2S DAC + amplifier) into one small, plug-and-play module.\u003c\/p\u003e\n\u003cp\u003eI2S (not to be confused with I2C) is the digital audio protocol used by many processors and microcontrollers to move sound data around a board. The MAX98357A listens on the standard I2S lines (data, bit clock, and left\/right clock) and needs no separate master clock, so it drops straight into Raspberry Pi, ESP32, Arduino, and other I2S-capable boards with minimal setup.\u003c\/p\u003e\n\u003cp\u003eDespite its size, this mono amplifier is genuinely powerful, delivering up to 3.2W into a 4Ω speaker. It's built around a true Class D amplifier core, running from 2.5V to 5.5V, which makes it highly efficient and well suited to portable or battery-powered builds. Built-in thermal and over-current protection keep it safe under load.\u003c\/p\u003e\n\u003cp\u003eThe output is bridge-tied, meaning both output pins connect directly to the speaker with neither one referenced to ground, so this board should drive a speaker directly rather than feed into another amplifier stage. A dedicated Gain pin lets you select 3dB, 6dB, 9dB, 12dB, or 15dB of gain via pull-up\/pull-down resistors, and the Shutdown\/Mode pin doubles as a channel selector, letting you output a mixed (L+R)\/2 signal or isolate just the left or right channel.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutput power: 3.2W at 4Ω (10% THD), 1.8W at 8Ω (10% THD), 5V supply\u003c\/li\u003e\n\u003cli\u003eI2S sample rates from 8kHz to 96kHz\u003c\/li\u003e\n\u003cli\u003eNo master clock (MCLK) required\u003c\/li\u003e\n\u003cli\u003eFive pin-selectable gain settings: 3dB \/ 6dB \/ 9dB \/ 12dB \/ 15dB\u003c\/li\u003e\n\u003cli\u003ePlug-and-play auto-configuration across 35 clock schemes and 128 audio formats\u003c\/li\u003e\n\u003cli\u003eClick-and-pop suppression\u003c\/li\u003e\n\u003cli\u003eThermal shutdown and over-current protection\u003c\/li\u003e\n\u003cli\u003eHigh jitter tolerance and strong EMI suppression, drive long speaker leads with no external filtering\u003c\/li\u003e\n\u003cli\u003eCompatible with Raspberry Pi, ESP32, Arduino, and other I2S-equipped boards\u003c\/li\u003e\n\u003cli\u003eSoldered on pin headers and terminals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePinout\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003ePin\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003ePower supply, 2.5V–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSD\u003c\/td\u003e\n\u003ctd\u003eShutdown \/ channel select. Pull low to disable the amp.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGAIN\u003c\/td\u003e\n\u003ctd\u003eGain and channel select. Fixed at 12dB in TDM mode.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDIN\u003c\/td\u003e\n\u003ctd\u003eDigital audio input (I2S data)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBCLK\u003c\/td\u003e\n\u003ctd\u003eBit clock input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLRC\u003c\/td\u003e\n\u003ctd\u003eLeft\/right clock (I2S\/LJ modes) or sync clock (TDM mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutput power: 3.2W @ 4Ω, 10% THD \/ 1.8W @ 8Ω, 10% THD (5V supply)\u003c\/li\u003e\n\u003cli\u003ePSRR: 77dB typ. @ 1kHz\u003c\/li\u003e\n\u003cli\u003eI2S sample rates: 8kHz–96kHz\u003c\/li\u003e\n\u003cli\u003eDimensions: 19.4mm x 17.8mm x 3.0mm (0.8\" x 0.7\" x 0.1\")\u003c\/li\u003e\n\u003cli\u003eWeight: 1.2g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eComes as an assembled and tested breakout with a pre-soldered terminal block and an optional header strip included loose (soldering required if you want the header fitted).\u003c\/p\u003e","brand":"Zaitronics","offers":[{"title":"Default Title","offer_id":56219220115748,"sku":"Z0886","price":9.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0870\/0021\/9940\/files\/H26906a0056fa477d9461b9c901f7797ea.jpg?v=1788776232","url":"https:\/\/zaitronics.com.au\/products\/max98357a-i2s-3w-class-d-amplifier-breakout","provider":"Zaitronics","version":"1.0","type":"link"}