Adafruit
Adafruit I2S Stereo Decoder - UDA1334A Breakout
The Adafruit UDA1334A I2S Stereo DAC Breakout converts digital I2S audio into clean stereo analogue line-level output. Built around the NXP UDA1334A, this ve...
The Adafruit UDA1334A I2S Stereo DAC Breakout converts digital I2S audio into clean stereo analogue line-level output. Built around the NXP UDA1334A, this versatile DAC supports 3.3V and 5V logic levels and works with MCLK-less interfaces like the Raspberry Pi — a built-in PLL generates the master clock from the bit clock signal automatically.
With ferrite beads, a low-dropout regulator, and a recommended band-pass filter on board, the output is clean across the full 20 Hz – 20 kHz range with no audible attenuation or distortion. Output is available via a 3.5 mm stereo headphone jack or breadboard-friendly pads.
Key Features
- NXP UDA1334A Stereo DAC – High-quality I2S to analogue conversion with clean line-level output
- 3.3V & 5V Logic Compatible – Works with a wide range of microcontrollers and single-board computers
- No MCLK Required – Built-in PLL generates the master clock from the bit clock, ideal for Raspberry Pi
- Multiple Data Formats – Supports classic I2S (default), plus 16-bit, 20-bit, and 24-bit left-justified formats
- 3.5 mm Stereo Jack – Plug in headphones or connect to powered speakers and amplifiers
- Breadboard-Friendly Pads – Alternative output for custom wiring and integration
- Clean Audio Path – Ferrite beads, LDO regulator, and band-pass filter for low-noise output
- Mute & De-emphasis Pins – Optional hardware mute and de-emphasis filter control
Ideal For
- Raspberry Pi audio output — works without a master clock
- Microcontroller projects requiring high-quality stereo DAC output
- Hi-fi audio prototypes and media player builds
- Any I2S-capable device needing analogue audio output
Package Contents
- 1× Adafruit I2S Stereo DAC Breakout (UDA1334A)
- 1× Header Strip
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V and 5V logic levels
- Logic level refers to the voltage a board uses to represent digital on and off signals. Support for both 3.3V and 5V logic means this breakout can connect more easily to common microcontrollers and single-board computers without extra level-shifting hardware.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- DAC
- A digital-to-analogue converter turns numbers from the microcontroller into a real analogue voltage. It matters if you want to generate simple waveforms, audio-style signals, or variable control voltages rather than just on/off outputs.
- I2S
- I2S is a digital audio interface used to send sound data between chips, such as from a microcontroller to an audio amplifier or DAC. It matters if your project needs cleaner digital audio output than a basic buzzer or PWM signal can provide.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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Related Tutorials
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