MAX98357 I2S Digital Audio Amplifier Module 3W Class D DAC

MAX98357 I2S Digital Audio Amplifier Module 3W

The MAX98357 I2S Audio Amplifier Module provides a simple way to add digital audio playback to your electronic projects. It integrates a digital-to-analog converter (DAC) and an efficient Class-D amplifier, allowing digital audio signals to be converted directly into amplified speaker output.

Using the I2S communication interface, the module can receive audio data from compatible microcontrollers and development boards without requiring a separate audio DAC or traditional analog amplifier circuit.

Its small size, efficient power consumption, and straightforward connections make it suitable for portable audio devices, smart speakers, voice-based projects, and embedded sound systems.

Key Features

• Integrated DAC and Amplifier: Combines digital audio conversion and speaker amplification in a single module.
• I2S Digital Audio Interface: Receives digital PCM audio signals from supported microcontrollers and processors.
• Up to 3.2W Audio Output: Delivers up to 3.2W into a 4-ohm speaker with a 5V supply under specified conditions.
• Class-D Amplification: Offers efficient audio amplification with reduced power losses.
• Wide Supply Voltage: The MAX98357 IC supports a single DC supply from 2.5V to 5.5V.
• Flexible Audio Input: Supports compatible I2S digital audio formats and configurations.
• Selectable Audio Channel: Supports left-channel, right-channel, or mono-mixed audio output.
• Compact Design: Suitable for integration into space-limited electronic devices.
• Protection Features: The IC includes short-circuit and thermal protection.
• Simple Microcontroller Integration: Can be connected to supported boards using BCLK, LRC, and DIN signals.

Applications

The MAX98357 module is suitable for:

• ESP32-based audio playback projects
• Raspberry Pi audio applications
• DIY smart speakers
• Voice assistant systems
• Internet radio projects
• Portable audio devices
• IoT audio equipment
• MP3 and WAV playback systems
• Robotics with voice and sound feedback
• Embedded sound and announcement systems

Programming and Compatibility

The module can be interfaced with compatible microcontrollers and development boards that provide an I2S audio interface.

It is commonly used with ESP32, Raspberry Pi, and other supported processors. Audio data is transmitted through the I2S interface, while the module handles digital-to-analog conversion and speaker amplification.

Important Usage Notes

• Use a compatible 4-ohm or 8-ohm speaker.
• Do not exceed the IC’s 5.5V maximum supply voltage.
• This is a mono amplifier module, not a stereo amplifier.
• It requires digital I2S audio input and does not accept ordinary analog audio input.
• The speaker output is bridge-tied (BTL). Do not connect either speaker output terminal to GND.
• Actual output power depends on supply voltage, speaker impedance, and operating conditions.

Highlights

• MAX98357 digital audio amplifier IC
• Integrated DAC and Class-D amplifier
• Up to 3.2W output at 5V with 4Ω speaker
• Supports I2S digital audio input
• Operating voltage: 2.5V–5.5V
• Efficient and low-power audio amplification
• Supports 8kHz–96kHz sample rates
• Selectable left, right, or mono-mixed audio
• Built-in thermal and short-circuit protection
• Compatible with ESP32 and Raspberry Pi
• Compact design for embedded audio projects

1 × MAX98357 I2S Digital Audio Amplifier Module.