Description
Product Description
The MAX98357 I2S Digital Audio Amplifier Module offers a simple, high-quality solution for adding audio output to microcontroller projects. This compact board utilizes the Maxim Integrated MAX98357A or MAX98357B IC, a digital I2S input Class D amplifier designed to convert digital audio streams directly into speaker-driving signals with minimal external components.
Unlike traditional analog amplifiers that require complex filtering circuitry, this module uses a unique, patented filterless Class D architecture. This design dramatically reduces the board size and complexity while maintaining excellent sound quality, efficiency, and low noise. It provides up to 3 watts of crisp mono audio output, making it perfect for small speakers. The digital I2S interface means fewer wires and less susceptibility to noise compared to analog lines, making it ideal for integration with popular single-board computers and microcontrollers like the ESP32, Raspberry Pi (3, 4, Zero), and Arduino Due or similar I2S-capable boards. The module operates from a single 2.7V to 5.5V DC supply and features integrated protections for reliable use.
Features
- Digital I2S Input: Accepts standard I2S digital audio data, eliminating the need for bulky analog audio lines and reducing noise.
- Filterless Class D Architecture: Patented design allows direct speaker connection without large output filters, saving space and complexity.
- High Power Output: Delivers up to 3 Watts of clear, mono audio power into a 4Ω load.
- Wide Operating Voltage: Operates efficiently from a single 2.7V to 5.5V DC supply.
- Flexible Data Formats: Supports 16-bit, 20-bit, or 24-bit I2S data in standard left-justified, right-justified, and TDM formats.
- Adjustable Gain: Configurable gain settings (3dB, 6dB, 9dB, 12dB, 15dB) via the GAIN pin for output level matching.
- Integrated Protections: Includes thermal shutdown and short-circuit protection for robust and safe operation.
- Compact Design: Extremely small form factor (approx. 20 mm x 20 mm) ideal for portable and space-constrained applications
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