SNAU308A November   2024  – May 2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Evaluation Setup Requirement
      2. 2.1.2 Connection Diagram
    2. 2.2 Jumper Information
    3. 2.3 Power Requirements
    4. 2.4 Reference Clock
    5. 2.5 Output Connections
    6. 2.6 Test Points
  9. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
    3. 3.3 USB2ANY Interface
  10. 4Implementation Results
    1. 4.1 Evaluation Setup
    2. 4.2 Performance Data and Results
      1. 4.2.1 RF Output
      2. 4.2.2 VCO Calibration
        1. 4.2.2.1 No Assist Operation
        2. 4.2.2.2 Full Assist Operation
      3. 4.2.3 SYSREF
        1. 4.2.3.1 SYSREF Clock Generation
        2. 4.2.3.2 SYSREF Pulse Generation
        3. 4.2.3.3 SYSREF Repeater Mode
      4. 4.2.4 Phase Adjustment
      5. 4.2.5 Phase Synchronization
        1. 4.2.5.1 Category 1b and Category 2 SYNC
        2. 4.2.5.2 Category 3 SYNC
      6. 4.2.6 Pin Mode
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Debug Information
    2. 6.2 Trademarks
  13. 7Revision History

6.1 Debug Information

If the EVM does not work as expected, consider the following:

Verify hardware setup:

  • Do not make modifications to the EVM or change the default settings until AFTER the EVM is verified to be working.
  • Validate power supply is connected, is turned on, and current limit is appropriate for the device.
  • Validate OSCIN signal is supplied, is turned on with appropriate output level.
  • Verify that the spectrum analyzer center frequency matches target frequency. Choose wide span so that the carrier can be seen if the frequency is off from center.
  • Verify that the device is not powered down by the CAL pin in Pin Mode.
  • When the EVM is in Pin Mode,
    • Power up current of the EVM is approximately 240mA if CAL header is strapped.
    • Power up current of the EVM is approximately 16mA if CAL header is open.
  • When the EVM is connected to a PC,
    • Power up current of the EVM is approximately 240mA if TICS Pro with EVM Default Mode configuration is loaded.
    • Power up current of the EVM is approximately 16mA, otherwise.
  • For LMX2624SPEVM and LMX2695SEPEVM,
    • If onboard LDO is used, there is an additional 20mA current drawn due to the LDO.
    • If onboard LDO is used, both VBIAS and VCCIN supplies are required.

Verify software setup:

  • If your configuration is not working, revert back to EVM Default Mode configuration, validate the device is locked and then modify the device again to your configuration.
  • Validate that no red warning is prompted. If so, mouse over to the warning element, read the tool tips or check the message in the bottom left status window.
  • Click the Reset device button once to reset the device, then load all the registers.
  • With No Assist operation, after changing the VCO frequency or enabling VCO doubler output, a VCO calibration is required. Click the Calibrate VCO button to initiate VCO calibration.
  • Register read back requires the correct configuration, see Figure 4-18 for details.

Verify PC communications:

  • In the menu bar, click USB Communications → Interface. Verify that the USB2ANY button is turned green. Click Identify to validate the USB LED on the EVM blinks.
  • Program POWERDOWN = 1 to validate there is significant current change.