The VT1729A EnvyUSB chip is a Universal Serial Bus Audio Controller for quality consumer headphone, speakerphone or IP phone applications. It conforms to the USB 2.0 Specification and supports Full-Speed mode. VT1729A supports USB Audio Class 1.0, and hence can enable driverless product. Featuring with the SPI, I2C, I2S, HD Audio link, S/PDIF, and MIDI interfaces, VT1729A’s stereo I/O supports most popular audio data formats and digital audio sampling resolutions. VT1729A requires only one 12-MHz crystal to generate all necessary clock frequencies for internal clock operation. VT1729A also integrates the 5V-to-3.3V and 3.3V-to-1.8V regulator that provides customer with extremely cost-competitive BOM solution.

VT1729A features the programmable High-Pass Filter for low frequency noise suppression. The advanced DSP features on-chip empowers 3-D like audio sensations. The parametric EQ with fully programmable coefficients is integrated to optimize audio output characteristics.

Feature Highlights

  • USB Interface
    • USB 2.0 Full-Speed (12 Mbps) Device Compliant
    • USB 2.0 High-Speed PHY Integrated
    • USB Audio Class v1.0 Device Compliant
    • USB Device Firmware Upgrade v1.1 Compliant
  • I2S Audio Interface
    • 1 I2S audio interface (shared with HD)
      • Mono/ 2-Ch
      • 16/20/24-bit
      • Supports 44.1/48/88.2/96/176.4/192kHz sample rates
  • HD Audio Link Interface
    • 1 HD audio link interface (shared with I2S)
      • Mono / 2,6,8-Ch
      • 16/20/24-bit
      • Supports 44.1/48/96/192kHz sample rates
  • S/PDIF Interface
    • 1 S/PDIF TX audio interface
      • Mono / 2-Ch
      • 16 / 20 / 24-bit
      • Supports 44.1/48/88.2 /96/176.4/192kHz sample rates
    • 1 S/PDIF RX audio interface
      • Mono/2-Ch
      • 16/20/24-bit

VT1729A Block Diagram


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