SNAU306 June   2024 LMKDB1104

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2EVM Quick Start
    1. 2.1 Hardware Setup
    2. 2.2 Software Setup
      1. 2.2.1 TICS Pro GUI Setup
      2. 2.2.2 Power Up Sequence
    3. 2.3 EVM Measurements
  8. 3Hardware
    1. 3.1 Device Operation Modes
    2. 3.2 EVM Configuration
      1. 3.2.1 Power Supply
      2. 3.2.2 Logic Input and Outputs
      3. 3.2.3 Clock Input
      4. 3.2.4 Clock Outputs
      5. 3.2.5 Status Outputs, LEDs and Test Points
  9. 4Software
    1. 4.1 TICS Pro LMKDB1104 Software
      1. 4.1.1 Input
        1. 4.1.1.1 Input Interface Type
        2. 4.1.1.2 Input Termination
        3. 4.1.1.3 Auto Output Disable (AOD)
        4. 4.1.1.4 LOS Event
        5. 4.1.1.5 LOS Readback
      2. 4.1.2 Device Info and EVM Setup
        1. 4.1.2.1 Device Info
        2. 4.1.2.2 EVM Setup
        3. 4.1.2.3 SMBus
      3. 4.1.3 Output
        1. 4.1.3.1 SMBus
          1. 4.1.3.1.1 Programmable Output Slew Rate Control
        2. 4.1.3.2 OE Pins and Slew Rate Control
        3. 4.1.3.3 Side Band Interface (SBI)
  10. 5Implementation Results
    1. 5.1 Typical Phase Noise Characteristic
  11. 6Hardware Design Files
    1. 6.1 Schematics
    2. 6.2 PCB Layouts
    3. 6.3 Bill of Materials (BOM)
  12. 7Compliance Information
    1. 7.1 Compliance and Certifications
  13. 8Additional Information
    1. 8.1 Trademarks
  14. 9References

3.2.3 Clock Input

LMKDB1104 can support different input interfaces depending on the input swing and common mode voltage. There are four input interfaces type that can be configured on LMKDB1104 using external components and internal termination schemes as shown in Figure 4-1. If using signal generator, then make sure to populate R3 with a 100Ω resistor or use internal or external 50Ω termination to ground.

  1. DC Coupled HCSL / LP HCSL Input.
  2. DC Coupled LVDS Input.
  3. External AC Coupled Input.
  4. Internal 50Ω to ground terminations.

    LMKDB1104EVM Input Interfaces

    Figure 3-1 Input Interfaces

    Table 4-8 outlines how to setup all different interfaces supported by LMKDB1104.

    Table 3-8 Input Interfaces
    Input Interface Configuration
    DC coupled HCSL / LPHCSL This is default EVM and device configuration. R2 and R4 values are 0Ω and Input Interface Type on Input page is selected to DC Coupled.
    DC coupled LVDS input Populate R3 with a 100Ω resistor and set Input Interface Type on Input page to DC Coupled.
    External AC coupled input Replace R2 and R4 with 0.1uF capacitor and set Input Interface Type on Input page to AC Coupled.
    Internal termination To enable internal 50Ω to ground terminations, set the Input Termination on Input page to Enabled.