The PCM2704/5/6/7 is TI's single-chip USB stereo audio DAC with USB-compliant full-speed protocol controller and S/PDIF. The USB-protocolcontroller works with no software code, but USB descriptors can be modified in some parts (for example, vendor ID/product ID) through the use of an external ROM (PCM2704/6), SPI (PCM2705/7), or on request. The modification of the USB descriptor through external ROM or SPI must comply with USB-IF guidelines, and the vendor ID must be your own ID as assigned by the USB-IF. The descriptor also can be modified by changing a mask; contact your representative for details. The PCM2704/5/6/7 employs SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback with low clock jitter.

• On-Chip USB Interface:
  • No Need of Dedicated Device Driver
  • With Full-Speed Transceivers
  • Fully Compliant With USB 1.1 Specification
  • Certified by USB-IF
  • Partially Programmable Descriptors
  • Adaptive Isochronous Transfer for Playback
  • Bus-Powered or Self-Powered Operation
• Sampling Rate: 32, 44.1, 48 kHz
• On-Chip Clock Generator With Single 12-MHz Clock Source
• Single Power Supply:
  • Bus-Powered: 5 V, Typical (VBUS)
  • Self-Powered: 3.3 V, Typical
• 16-Bit Delta-Sigma Stereo DAC
  • Analog Performance at 5 V (Bus-Powered),3.3 V (Self-Powered): THD+N: 0.006% RL > 10 kΩ, Self-Powered THD+N: 0.025% RL = 32 Ω SNR = 98 dB Dynamic Range: 98 dB PO = 12 mW, RL = 32 Ω
  • Oversampling Digital Filter Pass-Band Ripple = ±0.04 dBStop-Band Attenuation = -50 dB
  • Single-Ended Voltage Output
  • Analog LPF Included
• Multiple Functions:
  • Up to Eight Human Interface Device (HID) Interfaces (Depending on Model and Settings)
  • Suspend Flag
  • S/PDIF Out With SCMS
  • External ROM Interface (PCM2704/6)
  • Serial Programming Interface (PCM2705/7)
  • I2S Interface (Selectable on PCM2706/7)
• Package:

• Number of DAC channels (#)
• 0
• Analog inputs
• 0
• Analog outputs
• 2
• DAC SNR (Typ) (dB)
• 0
• Sampling rate (Max) (kHz)
• 48
• Control interface
• HID, SPI
• Resolution (Bits)
• 16
• Architecture
• USB 1.1

PCM2705的完整型号有：PCM2705DB、PCM2705DBR，以下是这些产品的关键参数及官网采购报价：

PCM2705DB，工作温度：-25 to 85，封装：SSOP (DB)-28，包装数量MPQ：50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PCM2705DB的批量USD价格：4.466（1000+）

PCM2705DBR，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PCM2705DBR的批量USD价格：3.752（1000+）

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