Adafruit I2S Stereo Decoder – UDA1334A Breakout

Looking for I2s Decoder? Adafruit I2S Stereo Decoder – UDA1334A Breakout is available at Zbotic with fast shipping across India.

This fully-featured UDA1334A I2S Stereo DAC breakout is a perfect match for any I2S-output audio interface. It’s affordable but sounds great! The NXP UDA1334A is a jack-of-all-I2S-trades: you can use 3.3V – 5V logic levels (a rarity), and can process multiple different formats by setting two pins to high or low. The DAC will process data immediately, and give you a clear, analog, stereo line level output. It’s even cool with MCLK-less I2S interfaces such as the Raspberry Pi (which it’s ideal for) – a built in PLL will generate the proper clock from the bitclock signal.

For inputs, you can use classic I2S (the default) or 16-bit, 20-bit or 24-bit left justified data. You can set it up to take an input system/master clock but we default-set it to just generate it for you, so you only need to connect Data In, Word Select (Left/Right Clock) and Bit Clock lines. If you want, there’s a mute pin and a de-emphasis filter you can turn on.

We put in plenty of ferrite beads, a low-dropout regulator, and the recommended band-pass filter so you get a very nice clean output. With a sine-wave generator we swept through 20-20KHz and saw no attenuation or distortion. Plug into either the 3.5mm stereo headphone jack or the breadboard-friendly pads. We think you’ll be pleased with this DAC!

Each order comes with one I2S Stereo DAC breakout and some header you can solder on.

Package Includes:

1 x Adafruit I2S Stereo Decoder – UDA1334A Breakout

Datashhet:-

https://cdn-learn.adafruit.com/downloads/pdf/adafruit-i2s-stereo-decoder-uda1334a.pdf

Adafruit I2S Stereo Decoder – UDA1334A Breakout Overview

The Adafruit I2S Stereo Decoder – UDA1334A Breakout is a compact board that converts digital I²S audio signals into analog stereo line-level output. Designed around NXP’s UDA1334A DAC, it supports 16-, 20-, and 24-bit audio formats and works without an external MCLK by using its on-board PLL.

Key Features of Adafruit I2S Stereo Decoder – UDA1334A Breakout

• Data Interface: I²S (standard, left-justified 16/20/24-bit formats)
• Voltage Range: 3.3 V to 5 V logic and power compatibility
• Single UDA1334A stereo DAC with built-in PLL for MCLK-less operation
• Direct analog stereo line-level outputs for amplifiers or mixers
• Compact breakout footprint with clearly labeled pins
• Genuine Adafruit product, fast shipping from Zbotic across India

Applications and Use Cases

• Adding high-quality audio output to Raspberry Pi projects without external clock
• Building custom microcontroller-driven audio players or synthesizers
• Integrating line-in for portable Bluetooth or battery-powered speakers
• Prototyping audio interfaces for robotics or home automation systems
• Upgrading digital audio sources in DIY soundbars and headphone amps

How to Use Adafruit I2S Stereo Decoder – UDA1334A Breakout

Connect the breakout’s BCLK, LRCLK and DATA pins to your microcontroller or Raspberry Pi’s I²S signals, power it with 3.3 V–5 V, and set the MODE1/MODE2 pins high or low to select the desired audio format. The onboard PLL generates the master clock, and the left/right analog outputs can be fed into an amplifier or mixer directly.

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Frequently Asked Questions

Does the UDA1334A breakout need an external master clock (MCLK)?

No, the onboard PLL generates the required MCLK from the bit clock (BCLK), so you can use MCLK-less I²S sources like the Raspberry Pi directly.

How do I select 16-, 20-, or 24-bit audio format?

Set the MODE1 and MODE2 pins high or low according to the datasheet: each combination selects classic I²S, left-justified 16-bit, 20-bit, or 24-bit formats.

Can I power the board at 5 V when my MCU runs at 3.3 V?

Yes, the breakout tolerates 3.3 V and 5 V logic levels, making it compatible with both voltage domains without additional level shifting.