The MAX98357 I2S 3W Class D Powerful Amplifier Module is an integrated digital audio decoder and amplifier board designed to convert I2S digital audio signals directly into high-quality analog… 2.5V to 5.5V DC · I2S (BCLK, LRCLK, DIN).
The MAX98357 I2S 3W Class D Powerful Amplifier Module is an integrated digital audio decoder and amplifier board designed to convert I2S digital audio signals directly into high-quality analog speaker output. Built around the Maxim MAX98357A IC, this module combines a high-performance Digital-to-Analog Converter (DAC) and a Class D audio amplifier into a single compact footprint, eliminating the need for an external analog DAC or complex audio filtering circuitry.
Featuring a filterless Class D architecture, the module achieves high power efficiency (up to 92%) with minimal heat generation, delivering up to 3.2W of output power into a 4-ohm speaker at 5V DC. It automatically detects sample rates from 8kHz up to 96kHz and supports standard I2S digital audio streams (BCLK, LRCLK, DIN). Onboard gain select pins allow flexible gain adjustment (3dB to 15dB) to match different speaker loads and input signal levels.
This module is widely used for adding clear audio playback, voice notifications, internet radio streaming, and sound effects to compact electronics. It is fully compatible with 3.3V and 5V microcontroller and single-board computer platforms including Raspberry Pi, ESP32, ESP8266, STM32, Arduino, and custom printed circuit boards (PCBs).
| Audio IC | MAX98357A I2S Class D Digital Amplifier |
|---|---|
| Output Power | Up to 3.2W at 4Ω load (5V supply, 10% THD) / 1.8W at 8Ω load |
| Operating Voltage | 2.5V to 5.5V DC |
| Digital Audio Interface | I2S (BCLK, LRCLK, DIN) |
| Sample Rates Supported | 8kHz to 96kHz auto-detection |
| Efficiency | Up to 92% high-efficiency Class D output |
| Gain Selection | Configurable onboard gain settings (3dB, 6dB, 9dB, 12dB, 15dB) |
| Filterless Design | Direct connection to speakers without output filters or inductors |
What is the operating voltage?
2.5V to 5.5V DC.
Which interface does it use?
I2S (BCLK, LRCLK, DIN).
Is it compatible with Arduino and ESP32?
Yes. It works with Arduino, ESP32, ESP8266, Raspberry Pi projects.
Can I buy the MAX98357 I2S 3W Class D powerful Amplifier Interface Audio Decoder Module Filterless Board for Raspberry Pi, ESP32 in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
