Wzmacniacz MAX98357A dekoder DAC I2S 3W moduł audio mono do Arduino ESP32

MAX98357A Amplifier DAC I2S Decoder 3W for ESP8266 / ESP32 / Arduino / Raspberry Pi

A compact module combining a digital-to-analog converter (DAC) and a class D audio amplifier based on the MAX98357A chip. The device offers output power up to 3W in mono mode. The use of the digital I2S interface ensures high-quality audio transmission, free from interference typical of traditional analog signal paths. The module is an excellent choice for embedded systems using platforms such as ESP32, ESP8266, Arduino, and Raspberry Pi, and works well with audio-video devices that require sound amplification.

Key Technical Features

• Integrated circuit: MAX98357A
• Module type: Class D digital amplifier with built-in DAC converter
• Maximum output power: up to 3W
• Supported speaker impedance: 4 to 8 Ohm
• Amplifier operating mode: Mono
• Adjustable gain: 3 dB, 6 dB, 9 dB, 12 dB, 15 dB
• Communication interface: I2S bus
• Supported encoding format: PCM
• Signal sampling rate: 8 kHz to 96 kHz
• Supply voltage: 2.7 V to 5.5 V
• Board dimensions: 19 x 18 x 2.5 mm
• Total weight: 2 g
• Included in the kit: MAX98357A module, pin header, ARK screw terminal

Benefits of Using the Module

• Higher signal purity through digital I2S transmission directly to the amplifier chip, bypassing noise-prone analog connections.
• Reduced cost and size of the target system - a single component integrates the digital audio converter and power driver.
• High energy efficiency resulting from the class D amplifier topology, which minimizes power losses and heat dissipation.
• Wide supply voltage range (2.7V - 5.5V) enabling power from both Li-Po batteries (3.7V) and standard 5V lines (e.g. from USB).
• Hardware volume and gain control thanks to configurable pins that set the amplifier gain level.

Example Applications

Thanks to simple implementation and the integrated I2S interface, this chip is widely used in multimedia system design. Main areas of use include:

• Building miniature internet radio receivers based on ESP32 and ESP8266 microcontrollers.
• Constructing smart speakers and voice assistant modules.
• Designing portable audio players and digital instruments (e.g. using Raspberry Pi Pico).
• Implementing voice notifications and warning signals in Smart Home systems and industrial automation.
• Expanding Arcade systems and Retro Gaming workstations with a built-in sound system.
• Creating interactive models, robots, and toys that play programmed sounds.