DESCRIPTION
●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
● − Suspend Flag
●• Package: 28-Pin SSOP
