產品詳細資料

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 2.0 Operating temperature range (°C) -25 to 85 Rating Catalog
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 2.0 Operating temperature range (°C) -25 to 85 Rating Catalog
TQFP (PJT) 32 81 mm² 9 x 9
  • On-Chip USB Interface:
    • No Dedicated Device Driver Needed
    • Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
      • USB 1.1 Descriptors With USB Audio
        Class Support
    • Certified by USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Bus-Powered or Self-Powered Operation
  • Sampling Rates: 32 kHz, 44.1 kHz, and 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
      • Passband Ripple = ±0.04 dB
      • Stop-Band Attenuation = –50 dB
    • Single-Ended Voltage Output
    • Analog LPF Included
  • Multiple Functions:
    • Up to Eight Human Interface Device (HID)
      Interfaces (Model and Setting Dependent)
    • Suspend Flag
    • S/PDIF Out With SCMS
    • External ROM Interface (PCM2704C/6C)
    • Serial Programming Interface (PCM2705C/7C)
    • I2S Interface (Selectable on PCM2706C/7C)
  • On-Chip USB Interface:
    • No Dedicated Device Driver Needed
    • Full-Speed Transceivers
    • Fully Compliant With USB 2.0 Specification
      • USB 1.1 Descriptors With USB Audio
        Class Support
    • Certified by USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Bus-Powered or Self-Powered Operation
  • Sampling Rates: 32 kHz, 44.1 kHz, and 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
      • Passband Ripple = ±0.04 dB
      • Stop-Band Attenuation = –50 dB
    • Single-Ended Voltage Output
    • Analog LPF Included
  • Multiple Functions:
    • Up to Eight Human Interface Device (HID)
      Interfaces (Model and Setting Dependent)
    • Suspend Flag
    • S/PDIF Out With SCMS
    • External ROM Interface (PCM2704C/6C)
    • Serial Programming Interface (PCM2705C/7C)
    • I2S Interface (Selectable on PCM2706C/7C)

The PCM270xC are TI’s single-chip USB stereo audio digital-to-analog converters (DACs) with USB 2.0 compliant full-speed protocol controller and S/PDIF. The USB-protocol controller works with no software code, but USB descriptors can be modified in some areas (for example, vendor ID/product ID) through the use of an external ROM (PCM2704C and PCM2706C) or serial peripheral interface (SPI) (PCM2705C and PCM2707C). The PCM270xC also employ SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog phase-locked loops (PLLs) with SpAct enable playback with low clock jitter.

The PCM270xC are TI’s single-chip USB stereo audio digital-to-analog converters (DACs) with USB 2.0 compliant full-speed protocol controller and S/PDIF. The USB-protocol controller works with no software code, but USB descriptors can be modified in some areas (for example, vendor ID/product ID) through the use of an external ROM (PCM2704C and PCM2706C) or serial peripheral interface (SPI) (PCM2705C and PCM2707C). The PCM270xC also employ SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog phase-locked loops (PLLs) with SpAct enable playback with low clock jitter.

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* Data sheet PCM270xC Stereo Audio DAC With USB Interface, Single-Ended Headphone Output and S/PDIF Output datasheet (Rev. B) PDF | HTML 2015年 8月 25日
Application note Differences between PCM270x and PCM270xC 2011年 8月 16日

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The PCM2706EVM-U is an evaluation module for the PCM2706C USB audio codec.

The EVM is supported by Windows® XP, Windows® Vista, Windows® 7, OSX and most operating systems which are compatible with USB class audio devices.

The PCM2706EVM-U connects to a USB port of a PC. The USB interface provides (...)

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