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Product details

Parameters

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 open-in-new Find other Audio DACs

Package | Pins | Size

SSOP (DB) 28 54 mm² 5.3 x 10.2 open-in-new Find other Audio DACs

Features

  • 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:
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Description

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-protocol controller 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.

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Technical documentation

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Type Title Date
* Datasheet Stereo Audio DAC With USB Interface Single-Ended Headphone Output and S/PDIF Out datasheet (Rev. F) Jan. 15, 2009
* Errata Updated Operating Environments for PCM270x, PCM290x Applications Oct. 19, 2007
User guides Value Soundbar Reference Design Kit Development Guide (Rev. A) Feb. 03, 2012
Application notes Differences between PCM270x and PCM270xC Aug. 16, 2011
User guides PCM270xEVM-U User's Guide May 12, 2011
Application notes Solving Enumeration Errors in USB Audio DAC and CODEC Designs Oct. 30, 2009
Application notes Dynamic Performance Testing of Digital Audio D/A Converters Oct. 02, 2000

Design & development

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SSOP (DB) 28 View options

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