Save -25% MAX98357A I2S 3W Class D Amplifier Module

MAX98357A I2S 3W Class D Amplifier Module

Original price was: 200.00 EGP.Current price is: 150.00 EGP.

MAX98357A I2S 3W Class D Amplifier Module converts digital I2S audio into an amplified mono speaker output. It operates from 2.5–5.5V and delivers up to 3.2W into a 4Ω speaker at 5V. The module is supplied unassembled; the screw terminal and pin header are not soldered.

SKU MAX98357A Mod SKU SYS X9412 Availability In stock
Quantities are confirmed after reviewing your order. Orders are normally prepared and shipped within 3–5 business days. Online availability does not necessarily mean the product is currently available at the branch.
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Description

MAX98357A I2S 3W Class D Amplifier Module

The MAX98357A I2S 3W Class D Amplifier Module combines an I2S digital audio interface, digital-to-analog conversion, and an efficient mono Class D speaker amplifier on one compact board. It can receive digital audio directly from a compatible microcontroller or single-board computer and drive a speaker without requiring a separate analog DAC.

Assembly notice: This module is supplied unassembled and not soldered. The included 2-pin screw terminal and 7-pin male header are supplied loose and require soldering before use.

[IMAGE SLOT: microohm_913.webp — Front view of the unsoldered MAX98357A module]

Key Features

  • Direct digital audio input through the I2S interface.
  • Integrated DAC and mono Class D speaker amplifier.
  • Up to 3.2W output into a 4Ω speaker with a 5V supply.
  • Wide 2.5–5.5VDC operating voltage range.
  • Supports audio sample rates from 8kHz to 96kHz.
  • Supports 16-bit, 24-bit, and 32-bit digital audio data.
  • Selectable 3dB, 6dB, 9dB, 12dB, or 15dB gain.
  • Default 9dB gain when the GAIN pin is left unconnected.
  • Up to 92% efficiency under the specified operating conditions.
  • Compact size for embedded and portable audio projects.

Technical Specifications

Amplifier IC MAX98357A
Amplifier Type Mono Class D amplifier with integrated DAC
Digital Audio Input I2S / left-justified
Supply Voltage 2.5–5.5VDC
Maximum Output Power Up to 3.2W into 4Ω at 5V
Speaker Impedance 4–8Ω
Sample Rate 8kHz to 96kHz
Audio Word Length 16 / 24 / 32-bit
Selectable Gain 3 / 6 / 9 / 12 / 15dB
Default Gain 9dB with GAIN unconnected
Speaker Output Differential mono output
Board Dimensions Approximately 18 × 19mm

Pinout & Pin Functions

VIN Positive 2.5–5.5VDC power input
GND Power and signal ground
BCLK I2S bit clock input
LRC I2S left/right word-select clock input
DIN I2S digital audio data input
GAIN Amplifier gain configuration
SD Shutdown and channel-selection control
OUT+ / OUT− Differential speaker output

[IMAGE SLOT: microohm_910.webp — MAX98357A pinout diagram]

Wiring & Connection

  • Connect VIN to a regulated 2.5–5.5VDC power supply.
  • Connect GND to the controller ground.
  • Connect BCLK, LRC, and DIN to the matching I2S signals.
  • Connect the speaker between OUT+ and OUT− only.
  • Do not connect either speaker output terminal to GND.
  • Solder the supplied screw terminal and pin header before use.

[IMAGE SLOT: microohm_912.webp — Example of the module after soldering]

Dimensions & Construction

The board measures approximately 18 × 19mm. The terminal block and pin header are supplied separately, allowing the required mounting direction to be selected before soldering.

[IMAGE SLOT: microohm_915.webp — MAX98357A board dimensions]

[IMAGE SLOT: microohm_914.webp — Rear view of the MAX98357A module]

Compatibility

The module works with controllers and computers that provide a compatible I2S audio output, including many ESP32 boards and Raspberry Pi models. It does not accept a normal analog AUX audio signal.

It can be paired with this ESP32 development board for digital audio projects. You can also browse additional products in the Audio Amplifier Modules category.

Applications

  • ESP32 and Raspberry Pi audio projects.
  • Portable mono speaker systems.
  • Voice assistants and notification devices.
  • Interactive installations with audio feedback.
  • Custom digital audio players.
  • Educational electronics and embedded prototypes.

Package Contents

  • 1 × MAX98357A I2S amplifier module — unsoldered.
  • 1 × 2-pin screw terminal — loose and unsoldered.
  • 1 × 7-pin male header — loose and unsoldered.

Important Notes

  • The terminal and male pin header are not soldered to the module.
  • Soldering tools and solder are not included.
  • The module provides a mono differential speaker output.
  • Never connect OUT+ or OUT− directly to ground.
  • Use a stable power supply capable of supplying the speaker current.
  • Actual output depends on the supply voltage, speaker impedance, audio signal, and operating conditions.

Attachments & Datasheets

Download the MAX98357A / MAX98357B Datasheet PDF

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