MAX08357 I2S Amp Breakout takes standard I2S digital audio input and, not only decodes it into analog, but also amplifies it directly into a speaker.
I2S in a digital sound protocol that is used on circuit boards to pass audio data around. 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.
Inside the miniature chip is a class D controller, able to run from 2.7V-5.5VDC. Class D makes it perfect for portable and battery-powered projects. It has built in thermal and over-current protection.
There's a Gain pin that can be manipulated to change the gain. By default, the amp will give you 9dB of gain.
Specification:
CHIP: MAX98357
Type: CLASS D
Output power: 3.2W at 4Ω and 10% THD; 1.8W at 8Ω and 10% THD.
I2S sampling rate: 8kHz-96kHz
Class D amplifier with optional gain: 3dB/6dB/9dB/12dB/15dB
Compatible Audio and Video Equipment Style: Player, Earphones and Headphones, Speakers, Professional Audio
Board Size：19 × 17.5 mm
Kit Weight：2.2g
Pin description:
LRC: Left/right clock in I2S and LJ mode. The synchronous clock is used in TDM mode.
BCLK: Bit clock input
DIN: digital input signal
GAIN: gain and channel selection. In TDM mode, the gain is fixed at 12dB
SD: Shutdown and channel selection. SD MODE is pulled low to put the device in a shutdown state.
GND: power ground
VCC: positive power supply, DC 2.5V-5.5V
Packing List:
1 × MAX08357 I2S Amp Breakout
1 × Pin header
1 × Terminal