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Operations Manual
Introduction
The DA2002 converts incoming digital inputs to 24 bit analog audio signals. The combination of excellent
linearity, small quantization steps, fast and accurate response and low noise performance enables reproduction
of the finest details. The DA2002 accommodates today's standard sample rates (40-50KHz) and the higher rates
of the new standards (80-100KHz).
The DA2002 provides many enhancements to the classical resistor weighting architecture. A triple segmented
design improves the accuracy of the 10 most significant bits. Short-term accuracy is maintained by keeping the
critical components at constant temperature in a linearly controlled oven. Long term accuracy is achieved by
extensive use of continuous automatic self-calibration.
A large number of extra codes enable the addition of digital DC offset to the signal path without signal clipping.
The DC offset provides superior low level detail by keeping low level signals away from the most significant bit
transitions. A quad switch deglitcher circuit removes the unwanted transition glitch energy.
The DA2002 eliminates jitter in the incoming data stream by use of a DSP controlled pullable crystal oscillator
and a short buffer memory for temporary storage of the incoming data. The DSP transfers the data from the
memory to the DAC disregarding any jitter in the input frequency. A proprietary fast-lock high-accuracy
measurement compares the average input frequency to the oscillator frequency and makes the appropriate
adjustments. The adjustments are done with sub pico-second resolution, to insure minimum interference with
signal reconstruction.
Additional features:
• 96kHz, 88.2kHz, 48kHz and 44.1kHz conversion frequencies
• Multi-bit architecture with 24 bits, non Sigma-Delta
• Very low Total Harmonic Distortion + Noise
• Automatic calibration
• Increased low level accuracy
• CrystalLock™ Digital Jitter removal
• Professional and consumer inputs and outputs
• Supports New Hi-density I/O Standards from Sonic Solutions
5
DA2002
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