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Full machine-readable index: https://core-electronics.com.au/llms.txt # Adafruit I2S 3W Class D Amplifier Breakout - MAX98357A **Type:** Product page · **SKU:** ADA3006 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/adafruit-i2s-3w-class-d-amplifier-breakout-max.html ([markdown](https://core-electronics.com.au/adafruit-i2s-3w-class-d-amplifier-breakout-max.html.md)) Listen to this good news - Adafruit now have an all in one digital audio amp breakout board that works incredibly well with the Raspberry Pi! If you're looking for an... ## Pricing - **Price:** $10.65 (inc GST) — $9.68 AUD, exc GST - **Quantity discounts:** 10+ $9.39 (exc GST) · 50+ $9.20 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 17 today, and up to 500 more in 7–12 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA3006:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA3006:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description Listen to this good news - Adafruit now have an all in one digital audio amp breakout board that works incredibly well with the [Raspberry Pi](https://core-electronics.com.au/#)! If you're looking for an easy and low cost way to get you digital sound files bumpin' then the **MAX08357 I2S Amp Breakout** is for you. It takes standard I2S digital audio input and, not only decodes it into analog, but also amplifies it directly into a speaker. Perfect for adding compact amplified sound, it takes 2 breakouts (I2S DAC + Amp) and combines them into one. I2S (not to be confused with I2C) in a digital sound protocol that is used on circuit boards to pass audio data around. Many high end chips and processors manage all of the audio in digital I2S format. Then, to input or output data, three or four pins are used (data in, data out, bit clock and left-right channel select). Usually, for audio devices, there's a DAC chip that will take I2S in and convert it to analog that can drive a headphone. This small mono amplifier is surprisingly powerful - able to deliver 3.2 Watts of power into a 4 ohm impedance speaker (5V power @ 10% THD). Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Since the amp is a class D, it's incredibly efficient - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but Adafruit could barely tell it got hot. The audio input is I2S standard, you can use 3.3V or 5V logic data. The outputs are "Bridge Tied" - that means they connect directly to the outputs, no connection to ground. The output is a ~300KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly. There's a Gain pin that can be manipulated to change the gain. By default, the amp will give you 9dB of gain. By connecting a pullup or pull down resistor, or wiring directly, the Gain pin can be set up to give 3dB, 6dB, 9dB, 12dB or 15dB. The ShutDown/Mode pin can be used to put the chip in shutdown or set up which I2S audio channel is piped to the speaker. By default, the amp will output (L+R)/2 stereo mix into mono out. By adding a resistor, you can change it to be just left or just right output Works great with Raspberry Pi, Arduino Zero, and any other microcontroller or microcomputer with I2S audio outputs ## Specs: - Output Power: 3.2W at 4Ω, 10% THD, 1.8W at 8Ω, 10% THD, with 5V supply - PSRR: 77 dB typ @ 1KHz - I2S sample rates from 8kHz to 96kHz - No MCLK required - Click + Pop reduction - Five pin-selectable gains: 3dB, 6dB, 9dB, 12dB, 15dB - Excellent click-and-pop suppression - Thermal shutdown protection Comes as an assembled and tested breakout board, with a small piece of optional header and 3.5mm terminal block. Some soldering is required to attach the header and terminal block if those are desired. [Check out the tutorial for schematics, diagrams, examples and more!](https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp) ## Technical Details [Datashsheets, EagleCAD files, Fritzing object and more in the tutorial](https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/downloads) **Revision History:** - **As of June 13, 2024** - We added a pre-soldered terminal block. Product Dimensions: 19.4mm x 17.8mm x 3.0mm / 0.8" x 0.7" x 0.1" Product Weight: 1.2g / 0.0oz ![](https://core-electronics.com.au/attachments/localcontent/rohs_icon_8216055e11.jpg) - [MAX98357 Datasheet](https://core-electronics.com.au/attachments/localcontent/MAX98357A-MAX98357B_264877ee3d9.pdf) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/3/0/3006-08.jpg)