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PCM2705C

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98dB SNR Stereo Full Speed DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

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98dB SNR Stereo Full Speed DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

PCM2705C

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Product details

Parameters

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 open-in-new Find other Audio DACs

Package | Pins | Size

SSOP (DB) 28 54 mm² 10.5 x 5.3 open-in-new Find other Audio DACs

Features

  • 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)
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Description

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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Type Title Date
* Datasheet PCM270xC Stereo Audio DAC With USB Interface, Single-Ended Headphone Output and S/PDIF Output datasheet (Rev. B) Aug. 25, 2015
Application note Differences between PCM270x and PCM270xC Aug. 16, 2011
Application note Dynamic Performance Testing of Digital Audio D/A Converters Oct. 02, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
149
Description

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 PC (...)

Features
  • Full-featured evaluation module for the PCM2704EVM-U and PCM2705EVM-U USB audio codec.
  • USB connection to PC provides power, control, and streaming audio data for easy evaluation.
View details

Design tools & simulation

SIMULATION MODEL Download
SBFM011.ZIP (54 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
View details

Reference designs

REFERENCE DESIGNS Download
Value Soundbar Reference Design Kit for Stereo or 2.1 Applications
TIDA-00089 — This is a Value Soundbar reference design kit for Stereo or 2.1 applications, which can easily be reapplied for PC speakers, or MP3 Docks. This is a complete reference design, including all programming hardware required, so you can get to working within minutes, a prototype within hours, and (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SSOP (DB) 28 View options

Ordering & quality

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  • Lead finish/Ball material
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  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

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