MAX98357 I2S 3W Class D Amplifier Breakout Interface DAC Decoder Module Filterless Audio Board For Raspberry Pi ESP32 I2S – KSH 700 at HIMASTORES Mombasa – best electronics in Kenya
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MAX98357 I2S 3W Class D Amplifier Breakout Interface DAC Decoder Module Filterless Audio Board For Raspberry Pi ESP32 I2S

SKU: HMJ619 Category: Amplifiers
KSH 700.00
In Stock

Product Description

MAX98357 I2S 3W Class D Amplifier Breakout Module

High-Efficiency I2S Audio Amplifier for Raspberry Pi & ESP32

The MAX98357 is a highperformance I2S audio amplifier breakout board that delivers 3W mono output with exceptional audio quality. This module features an integrated digitaltoanalog converter (DAC) and a Class D amplifier, providing a filterless, singlechip solution for I2S audio applications. Perfect for Raspberry Pi, ESP32, and Arduino projects requiring high-quality sound output.

I2S digital audio input with 3.2W output at 5V into 4Ω load
Builtin DAC and Class D amplifier no external components required
Operates on 2.5V to 5.5V - check your logic level (3.3V or 5V)

Technical Specifications

ParameterValue
Amplifier ICMAX98357AETE+
Output Power3.2W (5V, 4Ω)
Power Supply2.5V - 5.5V
Audio InputI2S Digital
Sample Rate8kHz - 96kHz
Resolution16bit, 24bit, 32-bit
Efficiency>90% (Class D)
THD+N0.06% (typical)
SNR>90dB
FeaturesFilterless, click/pop suppression
Dimensions~20 x 15mm
InterfaceI2S (BCK, LRCK, DIN)

= Key Features =

Integrated DAC Builtin digitaltoanalog converter eliminates external components

Filterless Class D - No output filter required, saving space and cost

I2S Digital Input - Direct connection to I2S audio sources (Raspberry Pi, ESP32)

Wide Sample Rate - Supports 8kHz to 96kHz sample rates

Low Power Consumption - High efficiency for portable applications

Excellent Sound Quality - 0.06% THD+N for clear audio

Click/Pop Suppression - Smooth startup and shutdown

Compatible Voltage Levels - Works with 3.3V and 5V logic

= Applications =

  • Raspberry Pi audio output
  • ESP32 Internet Radio
  • DIY speakers and amplifiers
  • IoT audio devices
  • Voice assistants and smart speakers
  • Wearable audio devices
  • Alarm and notification systems
  • Portable audio players
  • Home automation sound output

Wiring Guide

MAX98357 PinRaspberry PiESP32Description
VIN5V5VPower supply (2.5-5.5V)
GNDGNDGNDGround
BCKGPIO 18GPIO 26Bit Clock (I2S)
LRCKGPIO 19GPIO 27Left/Right Clock (I2S)
DINGPIO 21GPIO 25Data Input (I2S)
GAIN3.3V3.3VGain selection (optional)
SD3.3V3.3VShutdown (active high)

> For Raspberry Pi, connect VIN to 5V, GND to GND, and I2S pins to GPIO 18, 19, 21

GAIN pin: Connect to VIN for 9dB, GND for 6dB, or leave floating for 3dB (default)
SD pin must be HIGH for normal operation

Gain Settings

GAIN PinGain (dB)Output VoltageOutput Power (5V, 8Ω)
Floating3dB1.4Vrms0.25W
GND6dB2.0Vrms0.5W
VIN9dB2.8Vrms1.0W

> Leave GAIN pin unconnected for default 3dB gain

Connect GAIN to VIN for maximum volume
Higher gain may cause clipping at higher volumes

How It Works

The MAX98357 combines a DAC and a Class D amplifier in a single chip:

  1. I2S audio data enters through DIN, synchronized by BCK and LRCK
  2. The built-in DAC converts the digital audio to analog
  3. The Class D amplifier converts the analog signal to high-efficiency PWM
  4. The filterless design directly drives the speaker without bulky LC filters
The module automatically detects sample rates and bit depths
The output is mono - for stereo you need two modules
The amplifier will enter shutdown if SD is pulled low

Why Choose MAX98357?

Singlechip I2Sto-speaker solution saves space and complexity
High audio quality with 0.06% THD+N
Filterless design reduces component count
Easy integration with Raspberry Pi and ESP32
Low power consumption for portable projects
Simple I2S interface with only 3 signal lines

√ No external DAC or amplifier needed

√ Works with 3.3V and 5V logic

√ Wide sample rate range (8kHz-96kHz)

√ Automatic mode detection

√ Supports mono audio applications

√ Gain-selectable for volume control

Raspberry Pi Setup

  1. Enable I2S audio in /boot/config.txt
  2. Install ALSA drivers
  3. Configure audio output to MAX98357
  4. Test with speaker-test command
  5. Play audio with aplay or audio players
The MAX98357 is natively supported in Raspberry Pi OS
I2S pins are shared with other GPIO functions - check pin conflicts
Use proper voltage levels (3.3V for Raspberry Pi, 5V for power)

Safety Precautions

Do not exceed 5.5V supply voltage
Ensure correct wiring of I2S signals
Use appropriate speaker impedance (4Ω-8Ω recommended)
Protect from ESD when handling
Keep away from moisture and heat sources
For maximum output power, use a stable 5V supply
For 3.3V logic systems, use level shifters if needed

## What's Included

  1. MAX98357 I2S Audio Amplifier Module
  2. Pin Header (un-soldered)

The MAX98357 I2S 3W Class D Amplifier Module provides high-quality, efficient audio output for your Raspberry Pi, ESP32, and microcontroller projects. With its integrated DAC and filterless Class D amplifier, it's the perfect solution for adding sound to IoT, voice, and audio applications.

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