MAX98357 I2S Class D Amplifier Module

Our MAX98357 Audio Amplifier Module features a digital input Class D design with pulse-code modulation (PCM), making it fully plug-and-play. It offers flexible pin configurations and layouts, high noise immunity, and low latency tolerance (minimum 8 dB). This MAX98357 I2S Class D Amplifier Module can effectively function as a 3.2 W Class AB amplifier with Class D efficiency, delivering Hi-Fi audio quality suitable for a wide range of applications.

The MAX98357 Module is ideal for microcontroller systems or development boards with I2S audio output, such as Raspberry Pi, Arduino, and ESP32. Additionally, it suppresses electromagnetic interference efficiently, allowing the connection of long-wire speakers without the need for external filters. 

Pins:

• LRC: Left/Right frame clock for I2S and LJ modes; sync clock for TDM mode
• BCLK: Bit clock input
• DIN: Digital audio input signal
• GAIN: Gain and channel selection
• SD: Shutdown and channel selection; pull SD_MODE low to enter shutdown
• GND: Power ground
• VCC: DC 2.5 V–5.5 V

With the MAX98357 I2S Class D Audio Amplifier Module, you can achieve high-fidelity sound performance in compact, flexible, and noise-resistant audio designs, making it a versatile choice for modern embedded audio projects.

Applications of the MAX98357 Audio Amplifier Module

1. Player: High-quality audio playback devices
2. Headphone: Driving personal audio headphones with clear sound
3. Speakers: Compact and high-fidelity speaker systems
4. Professional Audio Equipment: Integration in studio or pro-grade audio setups
5. Digital-to-Analog Converter (DAC): Converting digital audio signals to analog output
6. Alarms: Sound generation for alert and notification systems
7. Interface with I2S Microphones: Direct connection to I2S digital microphones for recording or processing

Specifications of the MAX98357 Amplifier Module

1. Output Power: 3.2 W @ 4Ω, THD 10%; 1.8 W @ 8Ω, THD 10%
2. Operating Voltage: DC 2.5 V–5.5 V
3. Amplifier Type: Class D with selectable gain options: 3 dB / 6 dB / 9 dB / 12 dB / 15 dB
4. I2S Sampling Rate: 8 kHz–96 kHz
5. Chip: MAX98357
6. Audio Input Compatibility: Supports I2S levels of 3.3 V and 5 V
7. Power Supply Rejection Ratio (PSRR): 77 dB at 1 kHz

Documents:

Example of the MAX98357 Module

MAX98357 Module Datasheet