LOW NOISE PCB LAYOUT – 4-layer Split Ground PCB with noise reduction techniques refined from years of High-Speed Mixed-Signal Design work.INPUT PSU FILTER - This circuit reduces input switch noise by 100:1 allowing the use of external switching supply with results similar to Linear.LINEAR PRE_REGULATOR - LT2941CT Low Noise 5V pre-regulator allows the critical Clock/AES power chain to be linear when an external linear PSU is used.ULTRA-LOW NOISE LDO’s – Two Ultra-Low Noise, High PSRR devices are used to separately power the WM8804 and the NDK Clock’s.
HIGH RESOLUTION CLOCKS – A pair of Ultra-Low Noise NDK NZ2520SDA oscillators drive the WM8804 in non-PLL mode for the lowest possible noise.Pinout conforms to the Metrun series of DAC's. PARALLEL I2S OUTPUT - The I2S Signals are buffered and accessible via an RJ45.DIFFERENTIAL I2S OUTPUT – An LVDS Differential Transmitter drives the I2S Bus over an HDMI Connector.SPDIF COAX OUTPUT - A 1:1 Isolation Transformer provides Bit Perfect Impedance Controlled Digital Audio Data 0.6V Consumer Standard Level.TOSLINK OPTICAL OUTPUT – Isolated Optical Transmitter.