SNAS815B december   2020  – june 2023 LMK1D1204 , LMK1D1208

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Electrical Characteristics
    5. 7.5 Typical Characteristics
  9. 8 Parameter Measurement Information
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Fail-Safe Input and Hysteresis
      2. 9.3.2 Input Mux
    4. 9.4 Device Functional Modes
      1. 9.4.1 LVDS Output Termination
      2. 9.4.2 Input Termination
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    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
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

10.2.3 Application Curves

The LMK1D1208's low additive noise is shown below. The low noise 156.25-MHz source with 24-fs RMS jitter shown in Figure 10-2 drives the LMK1D1208, resulting in 46.4-fs RMS when integrated from 12 kHz to 20 MHz (Figure 10-3). The resultant additive jitter is a low 39.7-fs RMS for this configuration. Note that this result applies to the LMK1D1204 device as well.

GUID-20210602-CA0I-GN5T-HMCW-60MTDBQFQ7DL-low.png
A.
Reference signal is low-noise Rohde and Schwarz SMA100B
Figure 10-2 LMK1D208 Reference Phase Noise, 156.25 MHz, 24-fs RMS (12 kHz to 20 MHz)
GUID-20210602-CA0I-J5LV-QK4Z-LNRFSWZ0SS7C-low.png Figure 10-3 LMK1D1208 Output Phase Noise, 156.25 MHz, 46.4-fs RMS (12 kHz to 20 MHz)

The Figure 10-4 captures the low close-in phase noise of the LMK1D1208 device. The LMK1D1204 and LMK1D1208 have excellent flicker noise as a result of superior process technology and design. This enables their use for clock distribution in radar systems, medical imaging systems etc which require ultra-low close-in phase noise clocks.

GUID-20210609-CA0I-3VLC-XTF6-H0QGVCLCBPT4-low.png Figure 10-4 LMK1D1208 Output Phase Noise, 100 MHz, 1 kHz offset: -147 dBc/Hz