VT1729A

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