Pro USB

   Dixon Systems' Pro USB is a high performance, desk top, professional USB audio codec interface device. It employs Texas Instrument’s PCM-2900E, a single-chip, USB, stereo audio codec with a USB-compliant full-speed protocol controller. It is used in place of a computer’s sound card and works with virtually any audio recording or editing software. A USB 1.1 (or higher) connection to the PC is all that’s required. The USB protocol controller requires no software.

   The PCM-2900E employs SpAct architecture, Texas Instrument’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct architecture enable playback and record with low clock jitter as well as independent playback and record sampling rates.

   The Pro USB also employs input and output analog anti-aliasing filters. The single ended outputs of the filters are followed by balanced line drivers. Analog inputs and outputs are balanced. The nominal input level is +4dBu. Internal trim pots allow adjustment of the output level. (This is normally not required.)

Features & Specifications:

On-Chip USB Interface: With Full-Speed Transceivers Fully Compliant with USB 2.0 Specification Certified by USB-IF USB Adaptive Mode for Playback USB Asynchronous Mode for Record Bus Powered 16-Bit Delta-Sigma ADC and DAC Sampling Rate: DAC: 32, 44.1, 48 kHz ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz On-Chip Clock Generator with Single 12-MHz Clock Source Single Power Supply: 5 V Typical (VBUS)

Stereo ADC: Analog Performance at VBUS = 5 V: THD+N = 0.01% SNR = 89 dB Dynamic Range = 89 dB Decimation Digital Filter: Pass-band Ripple = ±0.05 dB Stop-Band Attenuation = 65 dB Anti-aliasing Filter Included Digital HPF Included Stereo DAC: Analog Performance at VBUS = 5 V: THD+N = 0.005% SNR = 96 dB Dynamic Range = 93 dB Oversampling Digital Filter: Pass-band Ripple = ±0.1 dB Stop-Band Attenuation = -43 dB