MAX98357A I2S Class D Audio Amplifier Module (Pre-Soldered) for ESP32
MAX98357A I2S Class D Audio Amplifier Module (Pre-Soldered) for ESP32
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Short Product Description
Short Product Description
Need crisp, high-quality audio for your next DIY electronics project without complex wiring? The MAX98357A I2S Audio Amplifier Module delivers plug-and-play, filterless Class D amplification perfect for ESP32, Arduino, and Raspberry Pi builds. Featuring pre-soldered pins for immediate prototyping and an impressive 3.2W output, this compact module instantly transforms your digital I2S audio signals into clear, powerful sound. Perfect for smart home devices, custom IoT speakers, and STEM projects.
Key Features
Key Features
- True Plug-and-Play I2S Audio: Automatically configures clocks and audio formats, eliminating the need for a Master Clock (MCLK) and simplifying your code.
- High-Efficiency Class D Amplification: Delivers up to 3.2W of power at 4Ω (10% THD) without requiring bulky heat sinks, perfect for compact IoT builds.
- Filterless Design: Connects directly to your speaker coils without requiring external output filtering, saving space and reducing component costs.
- Pre-Soldered Pins & Terminals: Comes with the 7-pin header and speaker terminal block pre-soldered, allowing you to jump straight into breadboarding.
- Wide Microcontroller Compatibility: Native support for Raspberry Pi, ESP32, and Arduino boards featuring an I2S digital audio output system.
- Flexible Gain & Channel Selection: Utilizing the SD and GAIN pins allows you to easily switch between channels or place the device into a low-power shutdown state.
Full Product Description
Full Product Description
Elevate Your IoT Audio Experience
Building a custom smart speaker, internet radio, or interactive IoT device shouldn't require an engineering degree in audio signal processing. The MAX98357A I2S Audio Amplifier Module is designed to take the digital audio straight from your microcontroller and drive a speaker directly. By keeping the audio strictly in the digital domain until the very last stage, it drastically reduces interference, static, and signal degradation, ensuring pristine sound quality for your projects.
Seamless I2S Integration (No MCLK Required)
One of the biggest hurdles in digital audio is clock synchronization. This module simplifies your build by eliminating the need for a master clock (MCLK). It features an integrated PLL (Phase-Locked Loop) that automatically detects the BCLK and LRC frequencies, allowing it to seamlessly configure up to 35 different clocks and 128 digital audio formats. Simply connect the standard I2S pins (DIN, BCLK, LRC), provide power, and you are ready to play audio from your ESP32 or Raspberry Pi.
Compact Size, Massive Output
Don't let the small footprint fool you. Running on a standard 5V logic supply, this filterless Class D amplifier delivers a robust 3.2W of power into a 4Ω speaker or 1.8W into an 8Ω speaker. The high efficiency of the Class D architecture means it generates minimal heat, making it perfect for battery-powered or tightly enclosed portable audio projects.
Built for Makers and Fast Prototyping
Time is your most valuable asset when prototyping. We stock this module with the 7-pin header already pre-soldered, alongside a robust screw terminal for your speaker wires. Whether you are dropping it onto a breadboard for testing or wiring it permanently into a 3D-printed enclosure, it is designed for rapid deployment. Backed by Sun Cheong Computer's 20 years of trusted electronics supply, you can rely on this module for consistent, high-fidelity performance.
Technical Specifications
Technical Specifications
- Audio chipset: MAX98357A
- Amplifier class: Class D (filterless)
- Output power: 3.2W @ 4Ω (10% THD), 1.8W @ 8Ω (10% THD)
- Operating voltage (VCC): DC 2.5V – 5.5V
- Supported sample rates: 8kHz to 96kHz
- Communication interface: I2S digital audio (DIN, BCLK, LRC)
- Master clock (MCLK): Not required (auto-configuring)
- Dimensions: 18.8mm x 17.8mm
- Connection type: Pre-soldered 7-pin header, screw terminal
Delivery Options
Delivery Options
- Local delivery within Hong Kong and in-store pickup.
- Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
- Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
- Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
- In-store pickup details (location and time) will be confirmed by email or phone message.
- Delivery times are estimates and may be affected by weather or unforeseen circumstances.
FAQ Section
FAQ Section
Q: Do I need a DAC (Digital-to-Analog Converter) to use this with my ESP32?
A: No! The MAX98357A has a built-in DAC. It takes the digital I2S signal directly from your ESP32 or Raspberry Pi and converts it to an analog signal to drive the speaker, bypassing the noisy internal DACs of most microcontrollers.
Q: Why doesn't this module have an MCLK pin?
A: The MAX98357A features advanced internal circuitry that automatically derives the necessary clocking from the Bit Clock (BCLK) and Left/Right Clock (LRC). This makes wiring much simpler and frees up a pin on your development board.
Q: Can I run this off a standard 3.3V power supply?
A: Yes, the module supports an operating voltage of 2.5V to 5.5V. However, for maximum output power (3.2W), providing a stable 5V supply to the VCC pin is recommended.
Target Users / Applications
Target Users / Applications
- IoT Developers: Building smart home voice assistants, Wi-Fi internet radios, and notification sounders.
- STEM Educators & Students: Creating interactive, audio-responsive electronics projects using Raspberry Pi or Arduino.
- DIY Audio Enthusiasts: Upgrading retro radios, building custom portable speakers, or adding high-quality audio to arcade cabinets.
