MakerHawk MAX98357 I2S

The MakerHawk MAX98357 I2S is a mono digital Class-D audio amplifier designed to deliver clear and powerful audio output from an I2S digital audio source. Based on the MAX98357A chip, this module converts digital audio signals directly into amplified speaker output, eliminating the need for an external DAC.

It is fully compatible with microcontrollers and embedded platforms such as ESP32, ESP8266, Raspberry Pi, Arduino (I2S), and other systems supporting the I2S interface. Thanks to its high energy efficiency and low thermal dissipation, it provides a reliable solution for embedded audio and IoT projects.

Key Features

• Mono digital Class-D audio amplifier

• I2S digital audio interface

• Output power up to 3 W (depending on supply voltage and load)

• High efficiency and low power consumption

• Low distortion and low noise

• No external DAC required

• Compact form factor, easy to integrate

Technical Specifications

• Main chip: MAX98357A

• Interface: I2S (DIN, BCLK, LRC)

• Supply voltage: 3.3 V to 5 V

• Recommended speaker impedance: 4 Ω to 8 Ω

• Output type: mono

• Amplifier class: Class D

• Operating temperature: -40 °C to +85 °C

Typical Pinout

• VIN / VDD: 3.3 V to 5 V power supply

• GND: ground

• DIN: I2S audio data input

• BCLK: I2S bit clock

• LRC / LRCLK: left/right channel clock

• GAIN / SD: gain control or shutdown (depending on version)

• SPK+ / SPK-: speaker output

Advantages

• Direct digital audio-to-speaker conversion

• Stable and reliable audio quality

• Easy integration with ESP32 and Raspberry Pi

• Very low standby power consumption

• Ideal for compact audio systems

Applications

• Embedded audio players

• Voice assistants

• IoT projects with audio output

• Audio alerts and notification systems

• Educational and DIY projects