Adafruit
Adafruit I2S Stereo Decoder - UDA1334A Breakout
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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...
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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 digital device uses to represent on and off signals, commonly 3.3V or 5V. When a board supports both 3.3V and 5V logic, it can connect more easily to common microcontrollers and single-board computers without extra level-shifting hardware.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny 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 single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
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