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PCM2704C

ACTIVE

98dB SNR Stereo Full Speed DAC with line-out & S/PDIF output, Bus/Self-powered (Ext. ROM Interface)

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Data sheet

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PCM2706C ACTIVE 98dB SNR Stereo Full Speed DAC with line-out and S/PDIF output, Bus/Self-powered (I2S) Available in QFP package

PCM2704C

ACTIVE
Data sheet Order now

Product details

Number of DAC channels 0 Analog inputs 0 Analog outputs 2 DAC SNR (typ) (dB) 0 Sampling rate (max) (kHz) 48 Control interface HID 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 Resolution (Bits) 16 Architecture USB 2.0 Operating temperature range (°C) -25 to 85 Rating Catalog
SSOP (DB) 28 79.56 mm² 10.2 x 7.8
  • 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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Technical documentation

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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 25 Aug 2015
Application note Differences between PCM270x and PCM270xC 16 Aug 2011

Design & development

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Evaluation board

PCM2704EVM-U — PCM2704 Evaluation Module

The PCM2704EVM-U and PCM2705EVM-U are evaluation modules for the PCM2704/5 USB audio codec’s.

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 PCM2704EVM-U and PCM2705EVM-U connect to a USB port of a (...)

User guide: PDF
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Simulation model

PCM2704C IBIS Model

SBFM010.ZIP (54 KB) - IBIS Model
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Simulation tool

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SSOP (DB) 28 Ultra Librarian
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