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Creltek I2S Stereo DAC v1.1 The Creltek I2S Stereo DAC features a high-quality 24-bit digital-to-analog converter for stereo audio in I2S format. Left and Right line-level outputs are provided on...Read More…
The Creltek I2S Stereo DAC features a high-quality 24-bit digital-to-analog converter for stereo audio in I2S format. Left and Right line-level outputs are provided on z pair female RCA phono connectors, which are also wired in parallel with an on-board 3.5mm TRS "stereo headphone" jack. A single row of header pins makes it perfect for breadboard or prototyping use. The analog audio output signals, along with extra grounds, are also brought out on the header pins.
A 1x12 strip of 0.1" spacing machined header pins (pictured) can be included as an option during purchase. RCA cables not included.
This board is based on the Wolfson/Cirrus Logic WM8524 stereo DAC IC. An integrated charge pump provides true 2Vrms line driver outputs from a single 3.3V power supply rail. Ground-referenced outputs and the use of a DC servo eliminate the need for line driving coupling capacitors and effectively eliminate power-up / power-down pops and clicks. Manufacturer-recommended output filters are included on board, and are designed to interface directly with typical (10kΩ impedance) line-level inputs. Care has been taken in routing and component placement to achieve a high-performance, low-noise design.
All common audio sampling rates between 8kHz and 192kHz are supported, using common Master Clock rates. The device interface operates in I2S slave mode, with a choice of Left-Justified, Right-Justified, or I2S bitstream formatting.
NOTE: This is a 3.3V device and is NOT 5V tolerant. The power supply and all connected digital signals must be 3.3V.
I2S Audio comprises the following signals:
Additionally, a master clock is required to drive the converter's internal operation, typically at 128x or 256x the Serial Clock frequency:
A Mute pin is provided, which silences the converter outputs and puts the device into low-power mode when pulled LOW. (A pull-up resistor is provided on board, so this pin can be left unconnected if mute functionality is not needed.):
Finally, a single hardware control pin is provided to select the bit stream format:
Please see the datasheet on the right for more detailed information.
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I'm an avid electronics hobbyist and a talented programmer with a passion for creative problem-solving, design, and systems integration. As a member of the Creltek design group, I enjoy finding elegant solutions to complex problems, and combining hardware and software in new and unique ways. I maintain an extremely wide range of interests, and strive to stay on the cutting edge through constant innovation and application, both at work and during personal pursuit in my free time.
My current electronics research includes LED lighting, resonant high-frequency switching power supplies, embedded systems, multi-core microcontrollers, digital audio and MIDI, and the design of reusable circuit modules for rapid prototyping, research, and development.
My day job involves managing the IT department and teaching at a small private college. You can check out my LinkedIn profile here: https://www.linkedin.com/in/kevpatt
Creltek is a private technology design group engaged in innovative software and hardware integration, research, and development. We strive for high quality and excellence by design. When a member of our engineering team creates a module or tool that might be useful to others, we try to make it available here on Tindie!
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