LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet
LMK04000BEVAL/NOPB
Specifications of LMK04000BEVAL/NOPB
LMK04000BEVAL
Related parts for LMK04000BEVAL/NOPB
LMK04000BEVAL/NOPB Summary of contents
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... LMK04000 Family Precision Clock Conditioner with Dual PLLs and Integrated VCO Evaluation Board Operating Instructions for rev3 PCBs National Semiconductor Corporation Precision Timing Devices LMK04000BEVAL LMK04000BEVAL-XO LMK04031BEVAL LMK04031BEVAL-XO LMK04002BEVAL LMK04033BEVAL Interface Division ...
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Table of Contents T C ....................................................................................................................... 2 ABLE OF ONTENTS G D ................................................................................................................... 4 ENERAL ESCRIPTION Evaluation Board Kit Contents ................................................................................................................................... 4 Available Evaluation Boards ...................................................................................................................................... 4 ...
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Bill of Material Custom to LMK04000BEVAL ....................................................................................................... 40 Bill of Material Custom to LMK04000BEVAL-XO ................................................................................................ 40 Bill of Material Custom to LMK04031BEVAL ....................................................................................................... 41 Bill of Material ...
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... National’s website, www.national.com/. • CodeLoader uWire cable (LPT --> uWire). Available Evaluation Boards National Semiconductor has released a series of evaluation boards which allow the customer to evaluate the different output types and VCO frequency ranges made available by the LMK04000 Family. Note possible to mount a VCXO on a –XO board or a Crystal on a non –XO board. See Appendix G: VCXO/Crystal changes for more details ...
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Available LMK04000 Family NSIDs Please refer to the datasheet for the most up to date list of available devices in the LMK04000 Family. Table 2. LMK040xxB Clock ...
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... Quick Start Full evaluation board instructions with data are downloadable from the product folder of the device at National Semiconductor’s website, www.national.com/. 1. Connect a voltage of 3.3 volts to either the Vcc SMA connector or the alternate connector. 2. Connect a reference clock from a signal generator or other source. Exact frequency depends on programming ...
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Default CodeLoader modes for evaluation boards CodeLoader saves the state of the device when exiting the software. To ensure a common starting point, the following modes listed ...
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Using CodeLoader to Program the LMK040xxB The purpose of this section is to walk the user through using CodeLoader to make some measurements with the LMK040xxB device. ...
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Program/Load Device Press “Ctrl – L” Assuming the Port Settings are correct now possible to click “Keyboard Controls” “Load Device” from the menu to ...
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Visual Confirmation of Frequency Lock After a device is selected and a default mode restored and loaded, the visual display on the board should indicate a ...
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Enable Clock Outputs To measure phase noise at the clock outputs, 1. Click on the “Clock Outputs” tab, 2. Enable an output, 3. Then set the ...
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PLL Loop Filters and Loop Parameters In jitter cleaning applications that use a cascaded PLL architecture, the first PLL’s purpose is to substitute the phase noise of ...
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PLL2 Loop Filter 122.88 MHz VCXO (Reference Input) LMK040x0B Charge Pump Current, Kφ Phase Detector Frequency Frequency 1228.8 Kvco 8 ...
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Evaluation Board Inputs/Outputs The following table contains descriptions of the various inputs and outputs for the evaluation board. Table 5. LMK040xx Evaluation Board I/O Connector Name Input/Output ...
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Connector Name Input/Output Description CLKin0/CLKin0*, Input CLKin1/CLKin1* LOS0, LOS1 Output OSCin/OSCin* Input ...
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Connector Name Input/Output Description Vtune1 Output uWire Input/Output LD Output LD_TP Output GOE Input SYNC* Input PTO Output ...
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Recommended Test Equipment Power Supply The Power Supply should be a low noise power supply. Phase Noise / Spectrum Analyzer For measuring phase noise an Agilent E5052A ...
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Appendix A: CodeLoader Usage Code Loader is used to program the evaluation board with either an LPT port using the included CodeLoader cable or with a USB ...
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Clock Outputs Tab The clock outputs tab allows the user to Enable/Disable individual clock outputs, select the clock mode (Bypass/Divided/Delayed/Divided & Delayed), set the clock output delay ...
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PLL1 Tab The PLL1 tab allows the user to change: • External VCXO (or Crystal oscillator) frequency. Note: This value must be entered in both the PLL1 ...
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PLL2 Tab The PLL2 tab allows the user to change: • VCO frequency • PLL2 Phase detector frequency • PLL2 R-counter value • PLL2 N-counter value • ...
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Bits/Pins Tab The Bits/Pins tab allows the user to program bits directly. Many of which are not available on other tabs. Refer to the datasheet for more ...
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• CLKin Options Box o CLKin_SEL – Sets manual or automatic switching modes for selecting a reference oscillator for PLL1. o LOS_TIMEOUT – The timeout value before ...
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Registers Tab The registers tab shows the value of each register. This is convenient for programming the device to the desired settings, then recording the hex values ...
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Appendix B: Typical Phase Noise Performance Plots PLL1 The LMK040xxB’s two stage jitter cleaning process involves masking the reference noise with a VCXO or Crystal. Therefore the ...
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Vectron 12.288 MHz Crystal The phase noise of the reference is masked by the phase noise of the crystal by using a narrow loop bandwidth. The crystal ...
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PLL2 The closed loop performance of the system as measured at the VCO output Fout. Fout phase noise performance of the various LMK options is plotted in ...
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Clock Outputs The LMK04000 Family features LVDS, LVPECL, 2VPECL, and LVCMOS types of outputs. Included below are various phase noise measurements for each output. Device LVDS LMK040x0B ...
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LMK040x0B Phase Noise -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 10 100 Figure 16 - LMK040x0B Phase Noise The Fout frequency ...
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LMK040x1B Phase Noise LMK040x1B Phase Noise -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 10 100 Figure 17 - LMK040x1B Phase Noise ...
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LMK040x2B Phase Noise -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 10 100 The Fout frequency is 1720.32 MHz. The clock out ...
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LMK040x3B Phase Noise LMK040x3B Phase Noise -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 10 100 The Fout frequency is 1966.08 MHz. ...
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Appendix C: Schematics Power Direct Power Vcc VccPLLPlane R1 Vcc SMA 0 ohm VccCLKoutPlane R2 0 ohm ...
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Main Fout Balun and Impedance Matching CLKout4_P CLKout4_N Fout SMA C24 R5 18 ohm 100 pF R6 ...
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Clock Outputs CLKout0 Output option 0 - LVPECL/2VPECL Output option 1 - LVPECL/2VPECL VccCLKoutPlane Output option 3 ...
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Appendix D: Board Layers Stackup Layers of the 6 layer evaluation board include: Blue is dielectrics • ...
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Appendix E: Bill of Materials Common Bill of Materials for Evaluation Boards Part Manufacturer Capacitors 33 pF ...
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Common Bill of Materials for Evaluation Boards (continued, 2/3) Resistors 0 ohm Vishay/Dale 18 ohm Vishay/Dale 51 ...
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Common Bill of Materials for Evaluation Boards (continued, 3/3) Open Open Open Open Open Open Open Open ...
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... National Semiconductor CVHD-950-122.88 Crystek Open Open Open Bill of Material Custom to LMK04000BEVAL-XO Part Manufacturer Capacitors Resistors 0 ohm Vishay/Dale 120 ohm Vishay/Dale Other LMK04000B National Semiconductor 12.288 MHz XTAL Vectron Open Open Open Open Part Number C0603C104J3RAC CRCW06030000Z0EA CRCW0603120RJNEA LMK04000B CVHD-950-122.88 Part Number ...
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... National Semiconductor CVHD-950-122.88 Crystek Open Open Open Bill of Material Custom to LMK04031BEVAL-XO Part Manufacturer Capacitors Resistors 0 ohm Vishay/Dale 120 ohm Vishay/Dale Other LMK04031B National Semiconductor 12.288 MHz XTAL Vectron Open Open Open Open Part Number C0603C104J3RAC CRCW06030000Z0EA CRCW0603120RJNEA LMK04031B CVHD-950-122.88 Part Number ...
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... CVHD-950-122.88 Crystek Open Open Open Bill of Material Custom to LMK04033BEVAL Part Manufacturer Capacitors 0.1 uF Kemet Resistors 0 ohm Vishay/Dale 120 ohm Vishay/Dale Other LMK04033B National Semiconductor CVHD-950-122.88 Crystek Open Open Open Part Number C0603C104J3RAC CRCW06030000Z0EA CRCW0603120RJNEA LMK04002B CVHD-950-122.88 Part Number C0603C104J3RAC CRCW06030000Z0EA CRCW0603120RJNEA LMK04033B CVHD-950-122 ...
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Appendix F: Balun Information Typical Balun Frequency Response The following figure illustrates the typical frequency response of the Mini-circuit’s ADT2-1T balun. Figure 18 - Typical Balun Frequency ...
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Appendix G: VCXO/Crystal changes This appendix contains instructions for changing the active on-board oscillator for PLL1. Changing from Crystal Resonator to VCXO If the board has been ...
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Disconnect Crystal RF path and connect VCXO RF path a. Remove resistors R15 and R31. b. Install 0.1 uF capacitors in C31 and C43. Figure 20 ...
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Connect charge pump output from PLL2 to VCXO Loop filter (A2). a. Remove R10 and install a 0 ohm resistor in R9. This resistor can be ...
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Changing from VCXO to Crystal Resonator If the board has been setup to use the VCXO for PLL1, the VCXO may be disabled and the crystal enabled ...
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Disconnect VCXO RF path and connect Crystal RF path a. Install 0 ohm resistors R15 and R31. b. Remove 0.1 uF capacitors in C31 and C43. ...
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Connect charge pump output from PLL2 to Crystal Loop filter (B2) a. Remove R9 and install a 0 ohm resistor in R10. This resistor can be ...
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Appendix H: LMK04000 The block diagram in Figure 27 illustrates the functional architecture of the LMK040xxB clock conditioner. It features a cascaded, dual PLL arrangement, available internal ...
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PLL1 has been designed to work with either an off-the-shelf VCXO package or with a user- designed discrete implementation that employs a crystal resonator and associated tuning ...
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Figure 29 - Crystal Oscillator Circuit diagram ...
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Appendix I: Properly Configuring LPT Port When trying to solve any communications issue convenient to program the POWERDOWN bit to confirm high/low current draw of ...
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Figure 31 - Selecting the LPT Port Correct LPT Mode If communications are not working, then it is possible the LPT port mode is set improperly. It ...
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Appendix J: Troubleshooting Information If the evaluation board is not behaving as expected, the most likely issues are… 1) Board communication issue 2) Incorrect Programming of the ...
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pin output is low, but the frequencies are the same possible that excessive leakage on Vtune pin is causing the digital lock ...