I. Product Overview
Raspberry Pi DA7212 Audio Codec Expansion Board – I2S Audio Sound Card with Rich Audio Interfaces
The DA7212 Audio Codec HAT is an audio expansion board for the Raspberry Pi, connecting via the 40-pin GPIO interface. It features the DA7212 as its core audio codec. The board is equipped with dual onboard microphones, a 3.5mm AUX recording input, a 3.5mm TRRS headphone jack, mono speaker output, stereo speaker output, a volume adjustment knob, a user button, status LEDs, and HAT EEPROM. It is designed for audio playback, recording, headphone/speaker switching, AUX input capture, and basic human-machine interaction.
II. Features
- Utilizes the DA7212 stereo codec chip with I2S audio transmission and I2C control interfaces.
- Rich audio input options: Dual onboard microphones, CTIA headset microphone input, and 3.5mm AUX analog audio input.
- Multiple audio outputs: Supports 3.5mm TRRS headphone output, mono speaker output, and stereo speaker output.
- Onboard volume adjustment knob for easy hardware-level volume control of TRRS headphone and stereo speaker outputs.
- Onboard user-configurable LEDs and button for easy human-machine interaction.
- Designed with 40-pin GPIO expansion header for compatibility with Raspberry Pi series boards.
III. Specifications
| Core Audio Codec | DA7212-01UM2 |
| Supply Voltage | 5V (via 40-pin header) |
| ADC SNR | 90dB |
| DAC SNR | 100dB |
| Stereo Speaker Amplifier | APA2068 |
| Audio Interface | I2S |
| Control Interface | I2C |
| Onboard Microphones | 2 |
| User Button | GPIO27 |
| Green LED D1 | GPIO23 |
| Blue LED D2 | GPIO24 |
| Board Dimensions | 65mm (L) x 30mm (W) |
IⅤ. Resource Overview
- Mono Speaker Output
- 3.5mm AUX Recording Input Jack
- 3.5mm TRRS Headphone Output Jack
- Stereo Speaker Output (PH2.0 4P)
- Onboard Microphone 1
- User Button (Connected to GPIO27)
- Volume Adjustment Knob (for TRRS headphone and stereo speaker outputs)
- Onboard Status LEDs: PWR (3.3V power indicator), D2 (Blue LED, connected to GPIO24), D1 (Green LED, connected to GPIO23)
- Onboard Microphone 2
WIKI
https://seengreat.com/wiki/216Package Contents
①DA7212 Audio Codec HAT x1②45100 Enclosure 8Ω 5W, 4-Pin 2.0mm Dual-Diaphragm Speaker x1③2x20P Female Header / Pin Header x1④Copper Standoff Kit x1