The PCM2900/2902 is Texas Instruments single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (only PCM2902). The USB protocol controller works with no software code, but the USB descriptors can be modified in some areas (e.g., vendorAPPLICATIONS
• USB Audio Speaker
• USB Headset
• USB Monitor
• USB Audio Interface Box
ID/product ID). The PCM2900/2902 employs SpAct architecture, TI’s unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback and record with low clock jitter and with independent playback and record sampling rates.
FEATURES
• PCM2900: Without S/PDIF
• PCM2902: With S/PDIF
• On-Chip USB Interface:
− With Full-Speed Transceivers
− Fully Compliant With USB 1.1 Specification
− Certified by USB-IF
− Partially Programmable Descriptors(1)
− 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 TYP (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
− Single-Ended Voltage Input
− Antialiasing Filter Included
− Digital LCF 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
− Single-Ended Voltage Output
− Analog LPF Included
• Multifunctions:
− Human Interface Device (HID) Volume ± Control and Mute Control
