Overview

The MAX98357 is an I2S digital audio amplifier module, often referred to as a Class D amplifier. It's a filterless Class D amplifier that can directly drive a speaker load, and it's suitable for various audio applications, especially those involving microcontrollers or microcomputers with digital audio capabilities.

Key Features and Characteristics:

• I2S Digital Input: Accepts standard I2S (not to be confused with I2C) digital audio data.

• Class D Amplifier: A type of amplifier that uses switching to efficiently amplify the audio signal.

• Filterless: Eliminates the need for output filtering, simplifying the design and reducing component count.

• Power Output: Can deliver 3.2 Watts into a 4-ohm speaker or 1.8 Watts into an 8-ohm speaker.

• Gain Selectable: Offers five pin-selectable gains (3dB, 6dB, 9dB, 12dB, 15dB).

• Power Supply: Operates from a single 2.5V to 5.5V DC power supply.

• I2S Sample Rates: Supports I2S sample rates from 8kHz to 96kHz.

• Protection: Includes thermal shutdown and over-current protection.

• Applications: Suitable for Bluetooth audio players, IoT nodes, smart home voice interaction, and robotic device audio players.

• Compatibility: Compatible with various microcontrollers and development boards with I2S audio output, such as Raspberry Pi, Arduino, ESP32, DFRobot.