The 2007 Ultra Micro DAC
The difference between a Micro DAC and Ultra Micro DAC is that the Ultra Micro DAC uses TI 627 in its output stage and has an Analog Devices AD1896 Asynchronous Sample Rate converter to upsample and the incoming data to 24-bit, 196kHz; smooth the upsampled data with an interpolation filter; and then reclock the data into the DAC with an ultra-low jitter clock oscillator. The result is smoother data lending toward a pleasing liquid sound more similar to vinyl and analog.
The Micro DAC and Ultra Micro DAC Common features
• Multiple Digital Inputs
• +/-15V Power Supply
• 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 class A operation (the 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.
