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Texas Instruments PCM270xC USB Stereo Audio DACs

Texas Instruments PCM270xC Single-Chip USB Stereo Audio Digital-to-Analog Converters (DACs) feature a USB-compliant full-speed protocol controller and S/PDIF. The USB-protocol controller on these USB audio DACs 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) or SPI™ (PCM2705C). PCM270xC also employs SpAct™ architecture, a TI 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. These Texas Instruments PCM270xC Audio DACs are ideal for use in USB headphones, audio speakers, CRT/LCD monitors, and audio interface boxes..

Features

  • On-Chip USB Interface
    • No Dedicated Device Driver Needed
    • 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 Rates: 32kHz, 44.1kHz, 48kHz
  • On-Chip Clock Generator with Single 12MHz Clock Source
  • Single Power Supply
    • Bus-Powered: 5V, Typical (VBUS)
    • Self-Powered: 3.3V, Typical
  • 28-Pin SSOP Packages
  • 16-Bit Delta-Sigma Stereo DAC
    • Analog Performance at 5V (Bus-Powered), 3.3V (Self-Powered)
      • THD+N: 0.006% RL > 10kΩ, Self-Powered
      • THD+N: 0.025% RL = 32Ω
      • SNR = 98dB
      • Dynamic Range: 98dB
      • PO = 12mW, RL = 32Ω
    • 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)
      • Serial Programming Interface (PCM2705C)

Applications

  • USB Headphones
  • USB Audio Speaker
  • USB CRT/LCD Monitor
  • USB Audio Interface Box
  • USB-Featured Consumer Audio Product

Functional Block Diagram

Block Diagram - Texas Instruments PCM270xC USB Stereo Audio DACs

Evaluation Modules

Texas Instruments USB-CTM-MINIDK-EVM Mini Dock Evaluation Module

A complete reference solution for a USB Type-C dock including audio, USB data, power, and video.

Learn Moretungkol sa Texas Instruments USB-CTM-MINIDK-EVM Mini Dock Evaluation Module View Productskaugnay ng Texas Instruments USB-CTM-MINIDK-EVM Mini Dock Evaluation Module
Inilathala: 2012-03-08 | Na-update: 2022-03-11