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20W Stereo Audio Amplifier Class D Max9744
Adafruit
A 20W stereo audio amplifier Class D board powered by MAX9744, featuring analog and digital volume control via I2C.
In stock
Specifications
4- Operating Voltage
- 4.5V-14V DC voltage
- Logic Level
- 3V or 5V depending on your microcontroller
- Gpio Count
- 10
- Connectivity
- I2C, 3.5mm stereo headphone jack, DC power jack
Pinout
14| Pin | Name | Functions | Notes |
|---|---|---|---|
| RIN | Right Audio Input | GPIO | Duplicate of the right channel input terminal block |
| LIN | Left Audio Input | GPIO | Duplicate of the left channel input terminal block |
| AGND | Analog Ground | GND | Quieter ground for audio signal referencing |
| SDA | I2C Data Line | I2C | Used in Digital Mode to control volume over I2C |
| SCL | I2C Clock Line | I2C | Used in Digital Mode to control volume over I2C |
| Vi2c | I2C Voltage Reference | GPIO | Logic voltage for I2C, connect to 3V or 5V depending on your microcontroller |
| SHDN | Shutdown Pin | GPIO | Connect to ground to turn off the entire chip and put it into low power mode |
| MUTE | Mute Pin | GPIO | Connect to ground to turn off only the audio output stages, faster than shutdown and keeps digital I2C audio levels |
| SYNCO | Sync Output | GPIO | High frequency signal from the PWM generator, about 1.4MHz |
| SYNC | Sync Input | GPIO | For advanced users who want to clock in their own PWM frequency, keep it above 800KHz |
| AD1 | I2C Address Select Pin #1 | GPIO | Used for I2C address selection |
| AD2 | I2C Address Select Pin #2 | GPIO | Used for I2C address selection |
| GND | Power Ground | GND | |
| VDD | Power Supply Voltage | POWER | 5-12VDC power from the terminal block/DC jack after polarity protection |
Interactive pinout
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