SLES117B August 2004  – December 2015 PCM1794A

PRODUCTION DATA. 

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

1 Features

  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range:
      • 132 dB (9 V RMS, Mono)
      • 129 dB (4.5 V RMS, Stereo)
      • 127 dB (2 V RMS, Stereo)
    • THD+N: 0.0004%
  • Differential Current Output: 7.8 mA p-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –130 dB
    • Pass-Band Ripple: ±0.00001 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
  • Accepts 16-Bit and 24-Bit Audio Data
  • PCM Data Formats: Standard, I2S, and Left-Justified
  • Optional Interface Available to External Digital Filter or DSP
  • Digital De-Emphasis
  • Digital Filter Rolloff: Sharp or Slow
  • Soft Mute
  • Zero Flag
  • Dual-Supply Operation: 5-V Analog, 3.3-V Digital
  • 5-V Tolerant Digital Inputs
  • Small 28-Pin SSOP Package

2 Applications

  • A/V Receivers
  • DVD Players
  • Musical Instruments
  • Car Audio Systems
  • Other Applications Requiring 24-Bit Audio

3 Description

The PCM1794A device is a monolithic, CMOS-integrated circuit that includes stereo digital-to-analog converters (DACs) and support circuitry in a small 28-pin SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1794A device provides balanced current outputs, allowing the user to optimize analog performance externally. Sampling rates up to 200 kHz are supported.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
PCM1794ASSOP (28)10.20 mm × 5.30 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Application Diagram

PCM1794A alt_sles117.gif