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.

• Number of ADC channels
• 2
• Number of DAC channels (#)
• 2
• Analog inputs
• 2
• Sampling rate (Max) (kHz)
• 48
• Control interface
• HID
• Features
• 500-mA max power configuration
• Analog outputs
• 2

PCM2904的完整型号有：PCM2904DB、PCM2904DBR，以下是这些产品的关键参数及官网采购报价：

PCM2904DB，工作温度：-25 to 85，封装：SSOP (DB)-28，包装数量MPQ：47个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM2904DB的批量USD价格：6.49（1000+）

PCM2904DBR，工作温度：-25 to 85，封装：SSOP (DB)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网PCM2904DBR的批量USD价格：5.408（1000+）

PCM290x USB Audio Filter Driver Installation Software

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