Design with Adafruit Stereo 2.8W Class D Audio Amplifier - I2C Control AGC - TPA2016 in Cirkit DesignerThe Adafruit Stereo 2.8W Class D Audio Amplifier with I2C Control AGC, featuring the TPA2016D2 chip, is a sophisticated audio amplification solution designed for projects that require high-quality sound in a compact form factor. This amplifier is capable of delivering up to 2.8 watts per channel into 4-ohm speakers. With its I2C interface, users can digitally control volume and configure the automatic gain control (AGC) settings, making it ideal for a wide range of applications such as DIY speakers, portable audio devices, and interactive installations.
This circuit is an audio playback system that uses a Raspberry Pi 5 to process digital audio signals. The signals are sent to an I2S DAC and then amplified by PAM8302 amplifiers to drive two loudspeakers, providing stereo sound output.
Open Project in Cirkit Designer
This circuit is an audio amplification system with multiple piezo speakers driven by a PAM8403 amplifier IC. It features an ATtiny microcontroller for potential audio control, powered by a 5V battery with capacitors for stabilization and a trimmer potentiometer for input level adjustment.
Open Project in Cirkit Designer
This circuit is a sophisticated audio playback and recording system with timekeeping functionality. It features an ESP32 S3 microcontroller for digital signal processing, connected to a DAC, an I2S microphone, an RTC, and a Micro SD card module. The audio output is handled by a 2.1 channel amplifier driving stereo speakers and a subwoofer, with power supplied by a series of 3.7V batteries and regulated by a DC step-down converter.
Open Project in Cirkit Designer
This circuit features a Teensy 4.0 microcontroller interfaced with an audio shield for audio processing, controlled by a potentiometer for volume adjustment. It is powered by an Adafruit PowerBoost 1000C with a toggle switch for power control, and includes a 12-pin FFC converter for additional connectivity options.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | Vin | Supply voltage (2.7V to 5.5V) |
| 2 | GND | Ground connection |
| 3 | L+ | Left channel positive output |
| 4 | L- | Left channel negative output |
| 5 | R+ | Right channel positive output |
| 6 | R- | Right channel negative output |
| 7 | SD | Shutdown control (active low) |
| 8 | GAIN | Gain selection input |
| 9 | ADR | I2C address select |
| 10 | SCL | I2C clock input |
| 11 | SDA | I2C data input/output |
#include <Wire.h>
#include <Adafruit_TPA2016.h>
Adafruit_TPA2016 audioamp;
void setup() {
Wire.begin(); // Join I2C bus
audioamp.begin(); // Initialize the amplifier
audioamp.setAGCCompression(TPA2016_AGC_OFF); // Disable AGC
audioamp.setGain(30); // Set gain to 30dB
}
void loop() {
// Your code to control the amplifier
}
Q: Can I use 8Ω speakers with this amplifier? A: Yes, but the output power will be lower than with 4Ω speakers.
Q: How do I change the I2C address? A: The I2C address can be changed by connecting the ADR pin to Vin or GND.
Q: What is the default I2C address? A: The default I2C address is 0x58.
Q: Can the amplifier run on a 3.3V supply? A: Yes, the amplifier can operate on a supply voltage as low as 2.7V.
Q: How do I enable the AGC feature? A: AGC can be enabled and configured through the I2C interface using the Adafruit_TPA2016 library.
For further assistance, consult the Adafruit support forums or the detailed datasheet for the TPA2016D2 chip.