PCM2705 98dB SNR Stereo USB2.0 FS DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control) | TI.com

PCM2705
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98dB SNR Stereo USB2.0 FS DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

 

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-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.

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:

Parametrics

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Part number Order DAC channels Analog inputs Analog outputs DAC SNR (Typ) (dB) Sampling rate (Max) (kHz) Control interface Resolution (Bits) Package size: mm2:W x L (PKG) Approx. price (US$)
PCM2705 Order now 0     0     2     0     48     HID
SPI    
16     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     3.52 | 1ku    
PCM2704 Samples not available 0     0     2     0     48     HID     16     28SSOP: 54 mm2: 5.3 x 10.2 (SSOP | 28)     3.42 | 1ku    
PCM2706 Samples not available 0     0     2     0     48     HID
SPI    
16     32TQFP: 81 mm2: 9 x 9 (TQFP | 32)     4.09 | 1ku