Lavry DA924 Operation Manual - page 4
DA924
Operations Manual
4
Introduction
The DA924 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 DA924
accommodates today's standard sample rates (40-50KHz) and the higher rates of the new
standards (80-100KHz).
The DA924 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 DA924 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