MAX98357 I2S PCM Digital audio Amplifier Board Class D DAC Decoder 3W


Description
The I2S (or IIS) bus is specifically designed for communication between digital audio/sound devices. The protocol is similar to I2C, but it is optimized for sending audio data.


The MAX98357 module integrates an I2C bus and a 3W class D amplifier. Similar amplifiers are often used in headphones or small battery-powered radios. For more information, we recommend reading datasheet.


It is mainly used with more powerful computers such as Raspberry or ESP32 microcontrollers.


Specifications:
Operating voltage: 2.5V - 5.5V
Bus: I2C 8 – 96 kHz
PSRR: 77dB typ@1kHz
Power: 3.2W at 4Ohm; 1.8W at 8Ohm (at 5V)
Gain: 3dB, 6dB, 9dB, 12dB, 15dB
Protection against overheating


Pin of MAX98357 I2S Audio Amplifier Module:
LRC: Frame clock. Left/Right clock for I2S and LJ modes. Sync clock for TDM mode.
BCLK: Bit clock input.
DIN: Digital input signal.
GAIN: Gain and channel selection.
SD: Shutdown and channel selection. Pull SD_MODE low to place the device in shutdown.
GND: Power ground.
VCC: DC 2.5V-5.5V.


This is an all in one digital audio amp breakout board that works incredibly well with the Raspberry Pi! If you're looking for an easy and low cost way to get you digital sound files bumpin' then the MAX98357 I2S Amplifier 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.