MAX98357 I2S Amplifier Module
Digital I2S Class D amplifier module based on the MAX98357, delivering up to 2.5 W with multiple gain modes. Compact and designed for microcontrollers with I2S audio output.
Pinout
- SPK-Official table 4 row 1
Speaker negative / 4Ω/8Ω ＜3W
Type · Ground - VCCOfficial table 4 row 2
Power input / DC 3.3V-5V
Type · Power - GNDOfficial table 4 row 3
Ground /
Type · Ground - NCOfficial table 4 row 4
Not connected pin /
Type · Control - SDOfficial table 4 row 5
Turn off amplifier, adjust sound channel / Refer to 4.1.2(SD Mode Description)
Type · GPIO - GAINOfficial table 4 row 6
Adjust amplifier gain / Default to 9dB/Refer to 4.1.1 Gain Control Description
Type · Analog - SPK+Official table 4 row 7
Speaker positive / 4Ω/8Ω ＜3W
Type · Power - DINOfficial table 4 row 8
Digital input signal /
Type · GPIO - BCLKOfficial table 4 row 9
Bit clock input / Bit Clock Input
Type · GPIO - LRCOfficial table 4 row 10
Frame clock / Left/right clock of I2S and LJ mode. Synchronized clock in TDM mode
Type · GPIO
| Pin | Position | Type | Function |
|---|---|---|---|
| SPK- | Official table 4 row 1 | Ground | Speaker negative / 4Ω/8Ω ＜3W |
| VCC | Official table 4 row 2 | Power | Power input / DC 3.3V-5V |
| GND | Official table 4 row 3 | Ground | Ground / |
| NC | Official table 4 row 4 | Control | Not connected pin / |
| SD | Official table 4 row 5 | GPIO | Turn off amplifier, adjust sound channel / Refer to 4.1.2(SD Mode Description) |
| GAIN | Official table 4 row 6 | Analog | Adjust amplifier gain / Default to 9dB/Refer to 4.1.1 Gain Control Description |
| SPK+ | Official table 4 row 7 | Power | Speaker positive / 4Ω/8Ω ＜3W |
| DIN | Official table 4 row 8 | GPIO | Digital input signal / |
| BCLK | Official table 4 row 9 | GPIO | Bit clock input / Bit Clock Input |
| LRC | Official table 4 row 10 | GPIO | Frame clock / Left/right clock of I2S and LJ mode. Synchronized clock in TDM mode |
Pin details
10 connections- SPK-Official table 4 row 1
Speaker negative / 4Ω/8Ω ＜3W
Ground - VCCOfficial table 4 row 2
Power input / DC 3.3V-5V
Power - GNDOfficial table 4 row 3
Ground /
Ground - NCOfficial table 4 row 4
Not connected pin /
Control - SDOfficial table 4 row 5
Turn off amplifier, adjust sound channel / Refer to 4.1.2(SD Mode Description)
GPIO - GAINOfficial table 4 row 6
Adjust amplifier gain / Default to 9dB/Refer to 4.1.1 Gain Control Description
Analog - SPK+Official table 4 row 7
Speaker positive / 4Ω/8Ω ＜3W
Power - DINOfficial table 4 row 8
Digital input signal /
GPIO - BCLKOfficial table 4 row 9
Bit clock input / Bit Clock Input
GPIO - LRCOfficial table 4 row 10
Frame clock / Left/right clock of I2S and LJ mode. Synchronized clock in TDM mode
GPIO
Start wiring
I2S · I2C · Analog · 3.3 – 5 V · Breakout
Verify supply voltage and logic levels before powering up.
Module pins: VCC, SPK+, SPK-, GND, GAIN, DIN, BCLK, LRC. Schematik maps them to your board in the app.
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