MAX98357A I2S Class-D Mono Amplifier
3W Class-D mono audio amplifier with a digital I2S/PDM input and integrated DAC, requiring no analog audio input, commonly paired with the ESP32/Raspberry Pi for I2S speaker output.
Aliase:MAX98357A, MAX98357, I2S Amplifier, Class-D Amp, PDM Audio Amp
Breakout Module (7-Pin Header)
7 Pins
Pinout Table7
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | LRC | Digital | I2S Left/Right Word Select Clock |
| 2 | BCLK | Digital | I2S Bit Clock |
| 3 | DIN | Digital | I2S Serial Audio Data Input |
| 4 | GND | Ground | 0V System Ground |
| 5 | VIN | Power | +2.5V to +5.5V Power Supply |
| 6 | GAIN | Analog | Gain Select (3dB/9dB/12dB/15dB via Resistor to GND/VIN or Floating) |
| 7 | SD | Digital | Shutdown / Channel Select (Low = Shutdown, Float = Mono L+R Mix) |