Texas Instruments LMK01000 User Manual
LMK01000 Evaluation Board
User's Guide
November 2013
SNAU037A
LMK01000
www.ti.com
1.6 GHz Low Noise Clock Buffer, Divider, and Distributor
Evaluation Board Operating Instructions
2 SNAU037A LMK01000 Evaluation Board November 2013
Copyright © 2013, Texas Instruments Incorporated
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Table of Contents
Equipment .................................................................................................... 4
Basic Operation ............................................................................................ 5
Appendix A: Schematics .............................................................................. 8
Appendix B: Quick Start for EVM Communications ................................... 11
November 2013 LMK01000 Evaluation Board SNAU037A 3
Copyright © 2013, Texas Instruments Incorporated
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Equipment
Power Supply
The Power Supply should be a low noise power supply. An Agilent 6623A Triple power supply with LC filters on the
output to reduce noise was used in creating these evaluation board instructions.
Phase Noise / Spectrum Analyzer
For measuring phase noise an Agilent E5052A is recommended. An Agilent E4445A PSA Spectrum Analyzer with the
Phase Noise option is also usable although the architecture of the E5052A is superior for phase noise measurements. At
frequencies less than 100 MHz the local oscillator noise of the PSA is too high and measurements will be of the local
oscillator, not the device under test.
Oscilloscope
The oscilloscope and probes should be capable of measuring the output frequencies of interest when evaluating this
board. The Agilent Infiniium DSO81204A was used i n creating these evaluation board instructions.
Reference Oscillator
The on board crystal oscillator will provide a low noise reference signal to the devi ce at offsets greater than 1 kHz.
Note: The default loop filter has a loop bandwidth of ~60 kHz. Inside the loop bandwidth of a PLL the noise is greatly
affected by any noise on the reference oscillator (OSCin). Therefore any noise on the oscillator less than 60 kHz will be
passed through and seen on the outputs. For this reason the main output of a Signal Generator is not recommended for
driving OSCin in this setup.
4 SNAU037A LMK01000 Evaluation Board November 2013
Copyright © 2013, Texas Instruments Incorporated
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Basic Operation
1) Connect a low noise 3.3 V power supply to the Vcc connector lo cated at the top left of the b oard.
2) Connect 122.88 MHz signal from signal gene rator output to CLKin 0 of board.
3) Please see Appendix B for quick start on interfacing the board. Co nnect PC to the uWire header.
1
Power
Supply
Vcc
2
3.3V
3
Pleasesee
Pleasesee
AppendixBfor
AppendixBfor
interfaceinfo
interfaceinfo
LaptoporPC
LaptoporPC
4) Start CodeLoader4.exe
uWire
header
CLKin0
SMACable
SMACable
SignalGenerator
122.88Mhz
November 2013 LMK01000 Evaluation Board SNAU037A 5
Copyright © 2013, Texas Instruments Incorporated
5) Select the device by ”Select Device” “Clock Conditioners”
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6) Enable the output to measure (example CLKout0 is ena bled below)
6 SNAU037A LMK01000 Evaluation Board November 2013
Copyright © 2013, Texas Instruments Incorporated
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