SLES102B December   2003  – March 2015 PCM1798

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 for Digital Filter
      1. 6.7.1 Analog Dynamic Performance
  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 and Reset Functions
        1. 7.3.1.1 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 Function Descriptions
        1. 7.3.4.1 Audio Data Format
        2. 7.3.4.2 Soft Mute
        3. 7.3.4.3 De-Emphasis
        4. 7.3.4.4 Zero Detection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Application for External Digital Filter Interface
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Application for Interfacing With an External Digital Filter
          2. 8.2.1.2.2 Audio Format
          3. 8.2.1.2.3 Analog Output
        3. 8.2.1.3 Application Curves
      2. 8.2.2 PCM1798 Typical Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 I/V Section
          2. 8.2.2.2.2 Differential Section
  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 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 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

1 Features

  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 123 dB
    • THD+N: 0.0005%
  • Differential Current Output: 4 mAp-p
  • 8× Oversampling Digital Filter:
    • Stop-Band Attenuation: –98 dB
    • Pass-Band Ripple: ±0.0002 dB
  • Sampling Frequency: 10 kHz to 200 kHz
  • System Clock: 128, 192, 256, 384, 512, or 768 fS With Autodetect
  • Accepts 16- and 24-Bit Audio Data
  • PCM Data Formats: Standard, I2S, and Left-Justified
  • Interface Available for Optional 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-Lead SSOP Package
  • Pin Assignment Compatible With PCM1794

2 Applications

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

3 Description

The PCM1798 device is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters (DACs) and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1798 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 NUMBER PACKAGE BODY SIZE (NOM)
PCM1798 SSOP (28) 10.20 mm × 5.30 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Block Diagram

PCM1798 fbd_sles102.gif