The PCM2904/2906 is Texas Instruments single-chip USB stereo audio codec with USB-compliant full-speed protocol controller and S/PDIF (PCM2906 only). The USB protocol controller works with no software code, but the USB descriptors can be modified in some areas (for example, vendor ID/product ID). The PCM2904/2906 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.
● PCM2904: Without S/PDIF
● PCM2906: 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 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
● 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
● APPLICATIONS
● USB Audio Speaker
● USB Headset
● USB Monitor
● USB Audio Interface Box
●(1)The descriptor can be modified by changing a mask.
●SpAct is a trademark of Texas Instruments.
●System Two, Audio Precision are trademarks of Audio Precision, Inc.
