SLES211C February   2008  – July 2015 PCM1681 , PCM1681-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings: PCM1681
    3. 7.3 ESD Ratings: PCM1681-Q1
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Thermal Information
    6. 7.6 Electrical Characteristics
    7. 7.7 Interface Timing Requirements
    8. 7.8 Typical Characteristics
      1. 7.8.1 Digital Filter (De-Emphasis Off)
      2. 7.8.2 De-Emphasis Filter
      3. 7.8.3 Analog Filter
      4. 7.8.4 Analog Dynamic Performance
        1. 7.8.4.1 Supply Voltage Characteristics
        2. 7.8.4.2 Temperature Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 System Clock Input
      2. 8.3.2 Power-on-Reset Function
      3. 8.3.3 Audio Serial Interface
      4. 8.3.4 Audio Data Formats and Timing
      5. 8.3.5 De-Emphasis Filter
      6. 8.3.6 Oversampling Rate Control
      7. 8.3.7 Zero Flag
      8. 8.3.8 Mode Control
        1. 8.3.8.1 Parallel Hardware Control
        2. 8.3.8.2 SPI Control Interface
        3. 8.3.8.3 Analog Outputs
          1. 8.3.8.3.1 VCOM Output
        4. 8.3.8.4 Register Write Operation
        5. 8.3.8.5 Interface Timing Requirements
    4. 8.4 Device Functional Modes
      1. 8.4.1 Control Modes
      2. 8.4.2 Audio Modes
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
        1. 8.5.1.1 Slave Address
        2. 8.5.1.2 Packet Protocol
        3. 8.5.1.3 Write Operation
        4. 8.5.1.4 Read Operation
      2. 8.5.2 Mode Control Registers
        1. 8.5.2.1 User-Programmable Mode Controls
    6. 8.6 Register Maps
      1. 8.6.1 Reserved Registers
      2. 8.6.2 Register Definitions
        1. 8.6.2.1  ATx[7:0]: Digital Attenuation Level Setting
        2. 8.6.2.2  MUTx: Soft Mute Control
        3. 8.6.2.3  DACx: DAC Operation Control
        4. 8.6.2.4  FLT: Digital Filter Roll-Off Control
        5. 8.6.2.5  FMT[3:0]: Audio Interface Data Format
        6. 8.6.2.6  SRST: Reset
        7. 8.6.2.7  ZREV: Zero-Flag Polarity Select
        8. 8.6.2.8  DREV: Output Phase Select
        9. 8.6.2.9  DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
        10. 8.6.2.10 DMC: Digital De-Emphasis All-Channel Function Control
        11. 8.6.2.11 REV[8:1]: Output Phase Select per Channel
        12. 8.6.2.12 OVER: Oversampling Rate Control
        13. 8.6.2.13 FLTx: Digital Filter Roll-Off Control per DATA Group
        14. 8.6.2.14 DAMS: Digital Attenuation Mode Select
        15. 8.6.2.15 AZRO[1:0]: Zero-Flag Channel-Combination Select
        16. 8.6.2.16 ZERO[8:1]: Zero-Detect Status (Read-Only, I2C Interface Only)
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 D/A Output Filter Circuits
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Hardware Control Method
        2. 9.2.2.2 Audio Input
        3. 9.2.2.3 Audio Output
        4. 9.2.2.4 Master Clock
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Qualified for Automotive Applications: PCM1681-Q1
  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 105 dB Typical
    • SNR: 105 dB Typical
    • THD+N: 0.002% Typical
    • Full-Scale Output: 3.75 VPP Typical
  • 4×/8× Oversampling Interpolation Filter:
    • Stop-Band Attenuation: –57 dB
    • Pass-Band Ripple: ±0.015 dB
  • Sampling Frequency: 5 kHz to 200 kHz
  • System Clock: 128 fS, 192 fS, 256 fS, 384 fS, 512 fS, 768 fS, or 1152 fS with Autodetect
  • Zero Flags for Selectable Channel Combinations
  • Flexible Mode Control:
    • SPI™/I2C™ Dual Mode for Serial Port
    • Parallel Hardware Control with 4 Functions
  • User-Programmable Functions (in SPI/I2C):
    • Flexible Audio Data Formats:
      • Right-Justified, I2S™, Left-Justified, TDM, DSP
      • 16- and 24-Bit Audio Data
    • Digital Attenuation: Mode Selectable
      • 0 dB to –63 dB, 0.5 dB/step
      • 0 dB to –100 dB, 1 dB/step
    • Soft Mute
    • Digital De-Emphasis
    • Digital Filter Roll-Off: Sharp or Slow
    • Oversampling Mode
  • User-Programmable Functions (in H/W):
    • Flexible Audio Data Formats:
      • Right-Justified, I2S, Left-Justified, TDM
      • Soft Mute
      • Digital De-Emphasis
      • Oversampling Mode
  • Power Supply Voltage: 5-V Analog, 3.3-V Digital
  • Package: 28-Lead HTSSOP PowerPAD™
  • Operation Temperature Range:
    • –40°C to 85°C for Consumer Grade
    • –40°C to 105°C for Automotive Audio Grade

2 Applications

  • Car Audio External Amplifiers
  • Car Audio AVN Applications
  • Integrated A/V Receivers
  • DVD Movie and Audio Players
  • HDTV Receivers
  • DVD Add-On Cards for High-End PCs
  • Digital Audio Workstations
  • Other Multichannel Audio Systems

3 Description

The PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages. The DACs utilize Burr-Brown's enhanced multilevel delta-sigma (ΔΣ) architecture to achieve excellent signal-to-noise performance and a high tolerance to clock jitter.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
PCM1681 HTSSOP (28) 9.70 mm × 4.40 mm
PCM1681-Q1
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Functional Block Diagram

PCM1681 PCM1681-Q1 fbd2_sles211.gif