Texas Instruments LMX2430, LMX2434, LMX2433, LMK04808B, LMK04806B User Manual
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LMX2430/33/34 Evaluation Board
User's Guide
November 2013
SNAU049A
LMX2430/33/34
Evaluation Board Instructions
2 SNAU049A LMK2430/33/34 Family November 2013
Copyright © 2013, Texas Instruments Incorporated
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E
QUIPMENT
B
ASIC OPERATION
LMX243X B
LMX2430 M
LMX2433 M
LMX2434 M
A
PPENDIX A: SCHEMATIC
A
PPENDIX B: BUILD DIAGRAM
A
PPENDIX C: FABRICATION AND ASSEMBLY
A
PPENDIX D: BILL OF MATERIALS
PPENDIX E: QUICK START FOR
A
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....................................................................................................................................................... 5
OARD INFORMATION
EASUREMENTS
EASUREMENTS
EASUREMENTS
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............................................................................................................................... 7
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EVM C
TABLE OF CONTENTS
............................................................................................................ 20
OMMUNICATIONS
....................................................................................... 22
November 2013 LMK2430/33/34 Family SNAU049A 3
Copyright © 2013, Texas Instruments Incorporated
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Equipment
Power Supply
The Power Supply should be a low n oise p ower supply. An Agil ent 6623A Tri ple powe r supply with LC filte rs on
the output to reduce noise was used in creating the se evaluation bo ard instructi ons.
Signal Generator
The Signal Generator should be capable of frequencies and power level required for the part. A Rohde &
Schwarz SML03 was used in creating these eval uation board instru ctions.
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 in creating these evaluation board
instructions.
4 SNAU049A LMK2430/33/34 Family November 2013
Copyright © 2013, Texas Instruments Incorporated
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Basic Operation
1. Connect the signal generator output to the OSCin input of the board. For this example w e use a 10
MHz sin signal at +5dBm power level.
2. Connect a low noise 5.0 V power supply to the Vcc connector lo cated at the top left of the b oard.
3. Please see Appendix C for quick start on interfacing the board. Connect PC to the uWire header.
Pleasesee
Pleasesee
AppendixDfor
AppendixDfor
interfaceinfo
interfaceinfo
3
1
LaptoporPC
LaptoporPC
SMA
SMA
Cable
Cable
Signal
10MHz
OSCin
Vcc
Generator
4. Run CodeLoader4.exe
5. Select the Device on board by “Select Device” “PLL-Dual integer” LMX24xx
2
Power
Supply
5.0V
November 2013 LMK2430/33/34 Family SNAU049A 5
Copyright © 2013, Texas Instruments Incorporated
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6. On the “RF PLL” Tab, make sure Reference Oscillator is 10 MHz and output frequency is set to within the
range of the VCO on the board. Press “Enter ” after makin g a change.
7. To program the settings into the device, Click “Keyboard Co ntrols” “Load Device”, or Press CTRL + L
6 SNAU049A LMK2430/33/34 Family November 2013
Copyright © 2013, Texas Instruments Incorporated
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LMX243x Board Information
Closed Loop Transfer Funct ion
80
60
40
20
0
Closed Loop Gain (dB)
-20
-40
-60
1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
Offset (Hz)
LMX2430 LMX2433 LMX 2434
Parameter LMX2430 LMX2433 LMX2434
VCO Frequency
(MHz)
VCO Gain
(MHz/V)
1600 – 1675 3200 - 3400 4690 - 4890
32 90 94
Charge Pump Gain (mA) 4 4 4
VCO Input Capacitance 39 22 12
Phase Detector Frequency (MHz) 1 1 1
OSCin Frequency (MHz) 100 100 100
Loop Bandwidth (kHz) 27.9 31.1 41.2
Phase Margin (deg) 56.8 59.6 58.4
Gamma 0.57 0.90 0.87
T3/T1 Ratio (%) 220.8 177.1 213.9
C1_LF (nF) 0.18 0.27 0.1
C2_LF (nF) 6.8 10 3.9
C3_LF (nF) 1 1 1
C4_LF (nF) Open Open Open
R2_LF (Kohm) 2.2 1.8 3.3
R3_LF (Kohm) 0.82 0.82 0.68
R4_LF (Kohm) 0 0 0
November 2013 LMK2430/33/34 Family SNAU049A 7
Copyright © 2013, Texas Instruments Incorporated
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LMX2430 Measurements
8 SNAU049A LMK2430/33/34 Family November 2013
Copyright © 2013, Texas Instruments Incorporated
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Spur at 1600 MHz VCO
frequency is -79.9 dBc.
Spur at 1650 MHz VCO
frequency is -79.5 dBc. Note
that this spur is not
symmetrical.
Spur at 1675 MHz VCO
frequency is -77.6 dBc.
November 2013 LMK2430/33/34 Family SNAU049A 9
Copyright © 2013, Texas Instruments Incorporated
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