The 2007 Ultra Micro DAC
The difference between a Micro DAC and Ultra Micro DAC is that the Ultra Micro DAC uses superb, hyper-costly Burr-Brown (TI) 627OPAs throughout and features an Analog Devices AD1896 Asynchronous Sample Rate converter to upsample the incoming data to 24-bit, 196kHz; plus 100% dedicated oscillation to smooth the upsampled data with an interpolation filter and then reclock that data into the DAC with an ultra-low jitter clock oscillator. The end result is accurately detailed and significantly musically 'warmer' digital data transmission lending toward a pleasingly liquid sound more similar to vinyl & analog sonic signatures.
The Micro DAC and Ultra Micro DAC Common features
• Multiple Digital Inputs: USB, optical, co-ax.
• +/-15V Power Supply
• 100% DC coupled signal path, from input to output
• Full dual mono design all the way back to the power supply
• Discrete emitter follower ouput stage, biased into true 'Class-A' operation (Diamond Buffer)
• Resistors are low noise, low drift .1% metal film types
• Local device decoupling with low-ESR, tight tolerance PPS film capacitors
• Power supply decoupling with ultra low ESR electrolytics
• Shortest signal path possible, PCB routed with high-speed signal integrity and low noise in mind
• Multi-layer PCB with dedicated, low impedance power and ground layers.
