MAX98357 I2S 3W CLASS D AUDIO DECODER AMPLIFIER

The MAX98357 is a digital input, Class D audio amplifier that supports I2S and left/right justified digital audio formats. With an integrated digital-to-analog converter (DAC) and amplifier, this compact module allows direct connection of digital audio sources to a speaker, making it ideal for space-constrained audio applications.

Key Features of MAX98357 I2S 3W Class D Audio Decoder Amplifier:

• Integrated DAC and Amplifier: Converts I2S digital input to analog audio output with built-in Class D amplifier.
• High Output Power: Provides up to 3W output into 4Ω load at 5V power supply.
• I2S Compatibility: Supports standard I2S, left-justified, and right-justified audio formats.
• Low Noise and Distortion: Ensures clear sound output with high fidelity.
• Short-Circuit and Thermal Protection: Built-in safety features to prevent damage during fault conditions.

Technical Specifications of MAX98357 I2S 3W Class D Audio Decoder Amplifier:

• Output Power: 3W @ 4Ω, 5V
• Power Supply Voltage: 2.5V to 5.5V
• Input Type: I2S digital audio
• Supported Formats: I2S, Left-Justified, Right-Justified
• THD+N: < 0.01%
• Efficiency: Up to 92%
• Speaker Load: 3Ω to 8Ω

Mechanical Specifications of MAX98357 Module:

• Module Dimensions: Approximately 14mm x 21mm
• Mounting Type: Through-hole solderable header pins
• Weight: Approx. 2 grams

Dimensions:

• Length: 21mm
• Width: 14mm
• Height: ~3mm (excluding headers)

Mounting Options:

• Through-Hole Mount: Suitable for breadboards and perfboards with male headers.
• Panel Mount: Can be housed inside enclosures for audio projects.

Schematic Diagram, Connection, Wiring and Pinout of MAX98357 Module:

• Power Supply: Connect 3.3V–5V to VIN and GND
• I2S Inputs: LRCLK (WS), BCLK, and DIN (SD)
• Audio Output: Connect speaker to LOUT and ROUT
• GND: Common ground for power and signal

Datasheet of MAX98357 I2S 3W Class D Audio Decoder Amplifier:

• Download MAX98357A Datasheet (PDF)

Applications of MAX98357 I2S 3W Class D Audio Decoder Amplifier:

• Voice Output in IoT Devices: Ideal for smart speakers and talking gadgets.
• Digital Audio Systems: Directly interfaces with Raspberry Pi, ESP32, or microcontroller I2S.
• Portable Music Players: Enables compact and efficient audio playback.
• Smart Home Devices: Provides voice feedback or sound effects in automation systems.

Equivalent of MAX98357 I2S 3W Class D Audio Decoder Amplifier:

• MAX98306: Dual-channel analog Class D audio amplifier
• TPA3110: I2S Class D audio amp with higher output
• PCM5102: I2S DAC for audio decoding without onboard amp

Package Includes:

• 1 x MAX98357 I2S 3W Class D Audio Decoder Amplifier Module