Adafruit STEMMA Piezo Driver Amp - PAM8904
We have ✅ 1 available of the AF-5791 in our Sydney warehouse. An extra 100 units available with a short lead time.
The Adafruit STEMMA Piezo Driver Amp uses the PAM8904 switched-capacitor driver to amplify signals for piezo elements at up to 300 kHz. With bridge-tied load (BTL) output and up to 3× voltage multiplication, it can deliver approximately 13 Vpp — much louder than driving a piezo directly from a 3V microcontroller.
The STEMMA JST-PH connector makes wiring simple: provide 3–5V DC power and a square wave signal (20 Hz to 300 kHz), connect your piezo to the terminal block, and set the gain with the onboard dual DIP switch.
Key Features
- PAM8904 Piezo Driver – Switched-cap BTL driver with built-in voltage boosting
- Frequency Range – 20 Hz to 300 kHz (suitable for audio and ultrasonic applications)
- Selectable Gain – Off, 1×, 2×, or 3× via dual DIP switch
- Up to ~13 Vpp Output – At 3× gain with differential BTL output
- 3–5V DC Input – STEMMA JST-PH connector for plug-and-play wiring
- Terminal Block Output – Easy connection to piezo elements
Ideal For
- Loud piezo buzzer and alert systems
- Ultrasonic distance sensing
- Audio tone generation
- Any project needing high-voltage piezo drive
Package Contents
- 1× STEMMA Piezo Driver Amp breakout (PAM8904)
The Adafruit STEMMA Piezo Driver Amp - PAM8904 appears in the following collections:
