SLES117B August   2004  – December 2015 PCM1794A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 System Clock Input
      2. 7.3.2 Power-On and External Reset Functions
      3. 7.3.3 Audio Data Interface
        1. 7.3.3.1 Audio Serial Interface
        2. 7.3.3.2 PCM Audio Data Formats and Timing
      4. 7.3.4 Audio Data Format
      5. 7.3.5 Soft Mute
      6. 7.3.6 De-Emphasis
      7. 7.3.7 Zero Detect
      8. 7.3.8 Advanced Segment DAC
      9. 7.3.9 Analog Output
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Control
      2. 7.4.2 Audio Input Modes
      3. 7.4.3 Audio Output Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 I/V Section
      2. 8.1.2 Differential Section
      3. 8.1.3 Interfacing With an External Digital Filter
        1. 8.1.3.1 System Clock (SCK) and Interface Timing
        2. 8.1.3.2 Audio Format
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Audio Input or Output
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DB|28
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9 Power Supply Recommendations

The PCM1794A device requires 5-V (nominal) supplies. A 5-V supply is required for the analog circuitry powered by the VCC1, VCC2L, and VCC2R pins. A second 5-V supply is for the digital circuitry powered by the VDD pin. These pins can be powered by the same 5-V rail but separating the supplies can assist with getting the target SNR and THD in some cases. Place the decoupling capacitors for the power supplies close to the device terminals.