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.
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.
Speaker negative / 4Ω/8Ω ＜3W
Power input / DC 3.3V-5V
Ground /
Not connected pin /
Turn off amplifier, adjust sound channel / Refer to 4.1.2(SD Mode Description)
Adjust amplifier gain / Default to 9dB/Refer to 4.1.1 Gain Control Description
Speaker positive / 4Ω/8Ω ＜3W
Digital input signal /
Bit clock input / Bit Clock Input
Frame clock / Left/right clock of I2S and LJ mode. Synchronized clock in TDM mode
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| 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 | pin | Not connected pin / | |
| SD | Official table 4 row 5 | digital io | 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 | digital io | Digital input signal / | |
| BCLK | Official table 4 row 9 | digital io | Bit clock input / Bit Clock Input | |
| LRC | Official table 4 row 10 | digital io | Frame clock / Left/right clock of I2S and LJ mode. Synchronized clock in TDM mode |
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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