Reference
This article explores the integration of professional chips and advanced audio output options like analog, coaxial, optical fiber, and I2S, emphasizing independent control, improved SNR, dynamic range, and HDMI interface for enhanced audio replay.
Principle
Supporting for 7 kinds of audio outputs like analog audio, coaxial, optical fiber, I2S, etc. The audio output signal of each interface can be independently turned on or off through the button on the board. The board employs four professional chips. Two groups of LDO are designed to power analog and digital circuits separately. Solid capacitors with large capacity and tantalum capacitors are used for filtering and decoupling to ensure a stable and clean power supply and effectively improve the overall SNR (signal to noise ratio).
PCM9211: TI original professional digital audio transceiver chip, up to 216K sampling rate and ultra-low jitter with coaxial transceiver clock less than 50RMS.
PCM5122: TI original DAC (Digital to Analog Converter) decoder chip, up to 384K/32Bit decoding capability, high SNR (signal to noise ratio) of 112dB and high dynamic range. Richer sounding with more details.
LVDS Output: I2S and DSD output employ DS90LV047A high-speed differential driver chip, supporting transmission rate of 200MHz and ensuring distortion-free I2S/DSD signal.
SiTime Crystal: Industrial programmable digital silicon oscillators, with ultra-low jitter and extremely-low phase noise.
I2S/DSD adopts HDMI interface and differential signal output, and a better replay effect can be obtained by connecting common HDMI cable to DAC decoder with I2S input.
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