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aspycaudio 21st September 2003 05:59 AM

What is your opinion? - Aspyc DAC-500
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I have started bulding a high-end DAC! The digital audio receiver and the digital to analog converter module was finished.

Digital Audio Receiver Module:
I using TORX173/RCA for digital input.
The input selected by an SN74LVC2G157 (Dual Data Selector, Little Logic, 3.3V) and routed to DIR1703 (96kHz, 3.3V).
The PLL pouwer supply for DIR1703 is regulated by a TPS79133 (3.3V, 100mA, VCO/PLL Ultralow-Noise LDO). The decodec signal and an external PCM signal are routed to SN74LV157 (Quad Data Selector, 3.3V). The selected data is routed to DF1706 (192kHz, 24-bit Interp. Filter). Connectors S/PDIF, OPTICAL, PSU, CONTROL, PCM DATA.

Digital To Analog Converter:
I using two PCM1738 (192kz, 24-bit, SPI control) in mono configuration. The differential signals are routed to OPA627 based I/V converters. The converter signals are routed to MAT03/AD797 based discret/integrated preamplifier.

Here is the schematic of the DAR module. The schematic of the DAC module coming soon.

So what is your opinion? (Sorry my bad english!!!)

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