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MAX98357 I2S PCM Digital Audio Amplifier Board - 3W Class D DAC Decoder in Lahore Pakistan

MAX98357 I2S PCM Digital Audio Amplifier Board – 3W Class D DAC Decoder

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MAX98357 I2S PCM Digital Audio Amplifier Board - 3W Class D DAC Decoder in Lahore Pakistan

🔊 MAX98357 I2S PCM Digital Audio Amplifier Board – 3W Class D DAC Decoder

✅ Product Overview

The MAX98357 I2S Digital Audio Amplifier Board is a 3W Class D audio DAC and amplifier designed to convert digital I2S signals into high-quality analog audio output. It is perfect for projects involving microcontrollers or single-board computers (like ESP32, ESP8266, Raspberry Pi, Arduino, STM32) that need digital-to-audio output.

Featuring a fully digital I2S interface, this board eliminates the need for complex analog circuitry. It integrates a low-noise DAC, filter, and Class D amplifier, making it ideal for portable, low-power, or battery-powered audio applications.

✨ Key Features

  • 📶 I2S Digital Audio Interface (PCM format)

  • 🔊 3W Output Power into 4Ω speaker at 5V

  • 🔋 Efficient Class D Amplification – reduces heat and power consumption

  • 🧠 Integrated DAC + Amplifier – all-in-one audio output solution

  • 🪛 Configurable I2S settings via pin straps (Left/Right/Mono, LRCLK)

  • 🔧 Built-in Short Circuit and Thermal Protection

  • ⚙️ Low THD+N (<1%) for clear, high-fidelity sound

  • 📦 Compact module – easy to embed in custom electronics and enclosures

📐 Technical Specifications

Parameter Value
IC Chip MAX98357A / MAX98357
Audio Input I2S (Left-Justified / Right-Justified / Mono)
Output Power Up to 3.2W (at 5V, 4Ω speaker)
Operating Voltage 3.3V to 5.5V DC
Speaker Impedance 4Ω or 8Ω
Signal-to-Noise Ratio 91 dB
THD+N <1%
Control Pins LRC, BCLK, DIN
Output Type Analog audio to speaker (via screw terminal)
Size Approx. 19mm x 13mm

🛠️ How to Use the MAX98357 Module

🧩 Pinout Reference

Pin Description
VIN / VDD Power Supply (3.3V–5.5V)
GND Ground
LRC LR Clock (Frame Sync)
BCLK Bit Clock
DIN Serial Data Input
SD (Optional) Shutdown / Enable
+ / - Speaker Output (Screw Terminals)

🔧 Typical Wiring (ESP32 Example)

MAX98357 Pin ESP32 Pin Example
VIN 5V
GND GND
DIN GPIO 22
BCLK GPIO 26
LRC GPIO 25
+ / - Connect to 4Ω or 8Ω speaker

Note: You must use I2S peripheral on ESP32 or Raspberry Pi to generate proper digital audio.

📋 Sample Code (ESP32 Arduino IDE)

Use the built-in I2S library:

#include "driver/i2s.h"

void setup() {
i2s_config_t config = {
.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX),
.sample_rate = 44100,
.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
.communication_format = I2S_COMM_FORMAT_I2S_MSB,
.intr_alloc_flags = 0,
.dma_buf_count = 8,
.dma_buf_len = 64,
.use_apll = false,
.tx_desc_auto_clear = true
};

i2s_pin_config_t pin_config = {
.bck_io_num = 26,
.ws_io_num = 25,
.data_out_num = 22,
.data_in_num = I2S_PIN_NO_CHANGE
};

i2s_driver_install(I2S_NUM_0, &config, 0, NULL);
i2s_set_pin(I2S_NUM_0, &pin_config);
}

🎯 Applications

  • DIY smart speaker systems

  • Audio output for microcontroller projects

  • Voice assistant or voice playback devices

  • Portable Bluetooth speaker builds

  • MP3 and WAV file playback via ESP32

  • Low-power, embedded audio devices

  • Internet radio via Raspberry Pi or ESP8266

📦 What’s Included

  • 1 × MAX98357 I2S Audio Amplifier Board

  • (Speaker, microcontroller, and wires not included)

⚠️ Notes & Tips

  • Works only with I2S audio, not analog or PWM audio

  • Output is meant for small speakers (4Ω–8Ω)

  • For stereo output, you’ll need two modules (left & right channel)

  • Do not power with more than 5.5V

🏷️ Suggested SEO Product Titles

  • MAX98357 I2S DAC Digital Audio Amplifier – 3W Class D for ESP32 & Raspberry Pi

  • 3W MAX98357A I2S Audio Amplifier Board – I2S DAC Decoder for Arduino & ESP32

  • Digital Audio Decoder MAX98357 Module – I2S PCM Class D Amp

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