SNAU309 October   2025

 

  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. 2Hardware
    1. 2.1 EVM Quick Start
      1. 2.1.1 Hardware Setup
      2. 2.1.2 Software Setup
    2. 2.2 EVM Configuration
      1. 2.2.1 Device Operational Modes
      2. 2.2.2 Power Supply
      3. 2.2.3 Logic Inputs and Outputs
      4. 2.2.4 Configuring the Clock Outputs
      5. 2.2.5 Using the USB Interface Connection
  8. 3Software
    1. 3.1 Software Installation
    2. 3.2 Software Description
      1. 3.2.1 User Controls Page
      2. 3.2.2 Raw Registers Page
      3. 3.2.3 Global Settings Page
      4. 3.2.4 EFUSE Pages Page
      5. 3.2.5 GPIO Page
      6. 3.2.6 FODs Page
      7. 3.2.7 Inputs Page
      8. 3.2.8 OUT0 Page
      9. 3.2.9 OUT1 & OUT2 Page
  9. 4Implementation Results
    1. 4.1 Evaluation Setup
    2. 4.2 Performance Data and Results
  10. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  11. 6Additional Information
    1. 6.1 Trademarks
  12. 7Related Documentation
    1. 7.1 Supplemental Content

4.2 Performance Data and Results

LMK3H2108EVM LMK3H2108EVM Typical Performance Using FOD0 Through PATH1, 100MHz Figure 4-1 LMK3H2108EVM Typical Performance Using FOD0 Through PATH1, 100MHz
LMK3H2108EVM SMA100B 100MHz Input to LMK3H2108EVM for Buffer Mode Measurement Figure 4-2 SMA100B 100MHz Input to LMK3H2108EVM for Buffer Mode Measurement
LMK3H2108EVM LMK3H2108 Typical Performance in Buffer Mode, SMA100B 100MHz Input Figure 4-3 LMK3H2108 Typical Performance in Buffer Mode, SMA100B 100MHz Input

Figure 4-1 shows the typical performance of the LMK3H2108EVM when all outputs are 100MHz LP-HCSL using FOD0 routed through PATH1. TI has seen a small performance improvement when using PATH1 instead of PATH0 for the clock source, on the order of tens of femtoseconds.

Figure 4-3 shows the performance of the LMK3H2108EVM when used in buffer mode. Figure 4-2 shows the performance of the input provided to the evaluation module for buffer mode testing.