SNLS514C November   2015  – October 2019 DS280BR810

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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 Electrical Characteristics -- Serial Management Bus Interface
    7. 6.7 Timing Requirements -- Serial Management Bus Interface
    8. 6.8 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 Device Data Path Operation
      2. 7.3.2 AC-Coupled Receiver and Transmitter
      3. 7.3.3 Signal Detect
      4. 7.3.4 2-Stage CTLE
      5. 7.3.5 Driver DC Gain Control
      6. 7.3.6 FIR Filter (Limiting Mode)
      7. 7.3.7 Configurable SMBus Address
    4. 7.4 Device Functional Modes
      1. 7.4.1 SMBus Slave Mode Configuration
      2. 7.4.2 SMBus Master Mode Configuration (EEPROM Self Load)
    5. 7.5 Programming
      1. 7.5.1 Transfer of Data with the SMBus Interface
    6. 7.6 Register Maps
      1. 7.6.1 Register Types: Global, Shared, and Channel
      2. 7.6.2 Global Registers: Channel Selection and ID Information
        1. Table 2. Global Register Map
      3. 7.6.3 Shared Registers
        1. Table 3. Shared Register Map
      4. 7.6.4 Channel Registers
        1. Table 4. Channel Register Map
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Backplane and Mid-Plane Reach Extension
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
      2. 8.2.2 Front-Port Applications
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Initialization Set Up
  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 Documents
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
    1. 12.1 Package Option Addendum
      1. 12.1.1 Packaging Information
      2. 12.1.2 Tape and Reel Information

Package Options

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

8.2.3 Application Curves

DS280BR810 MinChSetup.gifFigure 11. Minimal Rx/Tx Channel Test Setup
DS280BR810 CAUI4_25p8G_800mVppd_PRBS9_EVM_EVM_BypBst1_2Bst2_2Vod_LoGain_eye_snls511.gifFigure 12. CAUI-4 Eye Mask with Minimal Rx/Tx Channel
DS280BR810 nPPI_10p3G_800mVppd_PRBS9_EVM_EVM_BypBst1_2Bst2_2Vod_LoGain_eye_snls511.gifFigure 13. nPPI Eye Mask with Minimal Rx/Tx Channel

Table 5. Settings and Measurements for CAUI-4 and nPPI with Minimal Rx/Tx Channel

25.78125 Gbps (CAUI-4) 10.3125 Gbps (nPPI)
DS280BR810 Rx Channel Loss 4 dB @ 12.9 GHz 2 dB @ 5.2 GHz
DS280BR810 Tx Channel Loss 4 dB @ 12.9 GHz 2 dB @ 5.2 GHz
EQ BST1 Bypass Bypass
EQ BST2 2 2
EQ BW 3 3
VOD 2 2
EQ DC Gain Mode Low Low
Total Jitter @ 1E-15 10.4 psP-P 10.5 psP-P
Differential Eye Height @ 1E-15 233 mVP-P 445 mVP-P
DS280BR810 MinTxSetup.gifFigure 14. 5 in Rx and Minimal Tx Channel Test Setup
DS280BR810 CAUI4_25p8G_800mVppd_PRBS9_5in5milFr4_EVM_EVM_2Bst1_0Bst2_2Vod_LoGain_eye_snls511.gifFigure 15. CAUI-4 Eye Mask with 5 in Rx and Minimal Tx Channel
DS280BR810 nPPI_10p3G_800mVppd_PRBS9_5in5milFr4_EVM_EVM_2Bst1_0Bst2_2Vod_LoGain_eye_snls511.gifFigure 16. nPPI Eye Mask with 5 in Rx and Minimal Tx Channel

Table 6. Settings and Measurements for CAUI-4 and nPPI with 5 in Rx and Minimal Tx Channel

25.78125 Gbps (CAUI-4) 10.3125 Gbps (nPPI)
Transmission Line 1 5 in 5 mil FR4 + 8 in SMA cable 5 in 5 mil FR4 + 8 in SMA cable
DS280BR810 Rx Channel Loss 14 dB @ 12.9 GHz 6 dB @ 5.2 GHz
DS280BR810 Tx Channel Loss 4 dB @ 12.9 GHz 2 dB @ 5.2 GHz
EQ BST1 2 2
EQ BST2 0 0
EQ BW 3 3
VOD 2 2
EQ DC Gain Mode Low Low
Total Jitter @ 1E-15 11.6 psP-P 10.4 psP-P
Differential Eye Height @ 1E-15 236 mVP-P 504 mVP-P
DS280BR810 MinTxSetup.gifFigure 17. 10 in Rx and Minimal Tx Channel Test Setup
DS280BR810 CAUI4_25p8G_800mVppd_PRBS9_10in5milFr4_EVM_EVM_4Bst1_2Bst2_2Vod_LoGain_eye_snls511.gifFigure 18. CAUI-4 Eye Mask with 10 in Rx and Minimal Tx Channel
DS280BR810 nPPI_10p3G_800mVppd_PRBS9_10in5milFr4_EVM_EVM_4Bst1_2Bst2_2Vod_LoGain_eye_snls511.gifFigure 19. nPPI Eye Mask with 10 in Rx and Minimal Tx Channel

Table 7. Settings and Measurements for CAUI-4 and nPPI with 10 in Rx and Minimal Tx Channel

25.78125 Gbps (CAUI-4) 10.3125 Gbps (nPPI)
Transmission Line 10 in 5 mil FR4 + 8 in SMA cable 10 in 5 mil FR4 + 8 in SMA cable
DS280BR810 Rx Channel Loss 22 dB @ 12.9 GHz 10 dB @ 5.2 GHz
DS280BR810 Tx Channel Loss 4 dB @ 12.9 GHz 2 dB @ 5.2 GHz
EQ BST1 4 4
EQ BST2 2 2
EQ BW 3 3
VOD 2 2
EQ DC Gain Mode Low Low
Total Jitter @ 1E-15 12.4 psP-P 10.4 psP-P
Differential Eye Height @ 1E-15 148 mVP-P 504 mVP-P
DS280BR810 RxTxChSetup.gifFigure 20. 10 in Rx and 5 in Tx Channel Test Setup
DS280BR810 GenericTest_25p8G_800mVppd_PRBS9_10in5milFr4_5in5milFr4_6Bst1_7Bst2_3Vod_LoGain_eye_snls511.gifFigure 21. Linear Mode: 10 in Rx and 5 in Tx Channel
DS280BR810 GenericTest_25p8G_800mVppd_PRBS9_10in5milFr4_5in5milFr4_4Bst1_2Bst2_3Vod_HiGain_Main16Pre2Pst13_eye_snls511.gifFigure 22. Limiting Mode: 10 in Rx and 5 in Tx Channel

Table 8. Settings and Measurements for 10 in Rx and 5 in Tx Channel

LINEAR MODE
(25.78125 Gbps)		 LIMITTING MODE
(25.78125 Gbps)
Transmission Line 1 10 in 5 mil FR4 + 8 in SMA cable 10 in 5 mil FR4 + 8 in SMA cable
Transmission Line 2 5 in 5 mil FR4 + 8 in SMA cable 5 in 5 mil FR4 + 8 in SMA cable
DS280BR810 Rx Channel Loss 22 dB @ 12.9 GHz 22 dB @ 12.9 GHz
DS280BR810 Tx Channel Loss 14 dB @ 12.9 GHz 14 dB @ 12.9 GHz
Total Channel Loss 36 dB @ 12.9 GHz 36 dB @ 12.9 GHz
EQ BST1 6 4
EQ BST2 7 2
EQ BW 3 3
VOD 3 3
EQ DC Gain Mode Low High
Tx Main-Cursor N/A 16
Tx Pre-Cursor N/A -2
Tx Post-Cursor N/A -13
Total Jitter @ 1E-15 15.8 psP-P 18.2 psP-P
Differential Eye Height @ 1E-15 61 mVP-P 79 mVP-P
DS280BR810 FIRSetup.gifFigure 23. FIR Test Setup
DS280BR810 FirLim_Main12Pre0Pst0_Main16Pre0Pst15_16T_28G_deEmbed_snls511.gifFigure 24. FIR Post-Cursor Example
DS280BR810 FirLim_Main12Pre0Pst0_Main12Pre11Pst0_16T_28G_deEmbed_snls511.gifFigure 25. FIR Pre-Cursor Example

Table 9. Example FIR Settings

Figure 24 Figure 25
(Pre, Main, Post) = (0, 12, 0) (Pre, Main, Post) = (0, 12, 0)
(Pre, Main, Post) = (0, 16, 15) (Pre, Main, Post) = (11, 12, 0)
DS280BR810 MinRxSetup.gifFigure 26. Transmit FIR Test Setup
DS280BR810 FirLim_Main16Pre2Pst13_5in5milFR4_PRBS9_25p8G_eye_deEmbed_snls511.gifFigure 27. 25.78125 Gbps Limiting Mode with FIR
DS280BR810 FirLim_Main15Pre2Pst14_5in5milFR4_PRBS9_28G_eye_deEmbed_snls511.gifFigure 28. 28.125 Gbps Limiting Mode with FIR

Table 10. Settings and Measurements for 5 in Tx Channel with Limiting Mode

25.78125 Gbps, Limiting Mode 28.125 Gbps, Limiting Mode
Transmission Line 5 in 5 mil FR4 + 8 in SMA cable 5 in 5 mil FR4 + 8 in SMA cable
DS280BR810 Tx Channel Loss 10 dB @ 12.9 GHz 11 dB @ 14 GHz
VOD 3 3
Main-Cursor 16 15
Pre-Cursor 2 2
Post-Cursor 13 14
Total Jitter @ 1E-15 13.8 psP-P 15.3 psP-P
Differential Eye Height @ 1E-15 142 mVP-P 138 mVP-P