Texas Instruments LMX2430 User manual

LMX2430/33/34 Evaluation Board
User's Guide
November 2013
SNAU049A

2 SNAU049A LMK2430/33/34 Family November 2013
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LMX2430/33/34
Evaluation Board Instructions

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TABLE OF CONTENTS
E QUIPMENT .................................................................................................................................................................4 
B ASIC O PERATION .......................................................................................................................................................5 
LMX243 X B OARD I NFORMATION ...............................................................................................................................7 
LMX2430 M EASUREMENTS ........................................................................................................................................8 
LMX2433 M EASUREMENTS ......................................................................................................................................10 
LMX2434 M EASUREMENTS ......................................................................................................................................12 
A PPENDIX A: S CHEMATIC .........................................................................................................................................14 
A PPENDIX B: B UILD D IAGRAM .................................................................................................................................15 
A PPENDIX C: F ABRICATION AND A SSEMBLY ............................................................................................................20 
A PPENDIX D: B ILL OF M ATERIALS ............................................................................................................................20
A
PPENDIX E: Q UICK S TART FOR EVM C OMMUNICATIONS .......................................................................................22 

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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.
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 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 in creating these evaluation board
instructions.

November 2013 LMK2430/33/34 Family SNAU049A 5
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Basic Operation
1. Connect the signal generator output to the OSCin input of the board. For this example we use a 10
MHz sin signal at +5dBm power level.
2. Connect a low noise 5.0 V power supply to the Vcc connector located at the top left of the board.
3. Please see Appendix C for quick start on interfacing the board. Connect PC to the uWire header.
5.0V
Power
Supply
Vcc
Signal
Generator
SMA
Cable
SMA
Cable
OSCin
10MHz
1
2
LaptoporPC
LaptoporPC
3
Pleasesee
AppendixDfor
interfaceinfo
Pleasesee
AppendixDfor
interfaceinfo
4. Run CodeLoader4.exe
5. Select the Device on board by “Select Device” “PLL-Dual integer” LMX24xx

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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 making a change.
7. To program the settings into the device, Click “Keyboard Controls” “Load Device”, or Press CTRL + L

November 2013 LMK2430/33/34 Family SNAU049A 7
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LMX243x Board Information
Parameter LMX2430 LMX2433 LMX2434
VCO Frequency
(MHz) 1600 – 1675 3200 - 3400 4690 - 4890
VCO Gain
(MHz/V) 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
Closed Loop Transfer Function
-60
-40
-20
0
20
40
60
80
1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
Offset (Hz)
Closed Loop Gain (dB)
LMX2430 LMX2433 LMX2434

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LMX2430 Measurements

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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.

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LMX2433 Measurements

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Spur at 3200 MHz VCO
frequency is below the noise
floor.
Spur at 3300 MHz VCO
frequency is - 83.4 dBc.
Spur at 3400 MHz VCO
frequency is - 83.6 dBc. Note
that this spur is not
symmetrical.

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LMX2434 Measurements

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Spur at 4690 MHz VCO is -
77.1 dBc.
Spur at 4790 MHz VCO
frequency is -79.1 dBc.
Spur at 4890 MHz VCO
frequency is -76.5 dBc.

14 SNAU049A LMK2430/33/34 Family November 2013
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Appendix A: Schematic
C1_RF
TBD
C2pRF
TBD
C2_RF
TBD
C3_RF
TBD
C1_IF
TBD
C13
100 pF
C14
100 pF
C2pIF
TBD
C2_IF
TBD
R2_IF
TBD
R3_IF
TBD
C3_IF
TBD
C3
100 pF
R18
18 ohm
R2_RF
TBD
R3_RF
TBD
R26
18 ohm
R27
18 ohm
R28
18 ohm
R7
10 k
R19
18 ohm
R17
18 ohm
R2pRF
Open
R2pIF
Open
C21
100 pF
Vcc_PLL
C12
100 pF
Vcc_PLL
C5
100 pF
Vcc_PLL
C10
1 uF
Vcc_RF
C1
1 uF
Vcc_IF
C2
100 pF
C15
100 pF
R12
10 k
R14
Open
R15
Open
Y1
Open
C7
Open
C6
Open
C4
0.1 uF
R16
51 ohm
R29
51 ohm
C20
1 uF
R32
10 k
C17
1 uF
R30
Open
C11
Open
Vcc_PLL
Vcc_PLL
R1
10 k
R2
8.2 k
1 2 3 4 5 6 7 8 910
uWire
HEADER_2X5(POLARIZED)
C19
10 uF
C16
10 uF
C18
0.1 uF
R3
10 k
R4
8.2 k
R6
10 k
R5
8.2 k
=organization
=title
=documentnumber =revision
GND
1
Vt
2
GND
3
GND
4
GND 5
MOD 6
GND 7
GND 8
GND 9
RFout 10
GND 11 GND 12
GND
13
Vcc
14
GND
15
GND
16
U3
VCO
GND
1
Vt
2
GND
3
GND
4
GND 5
MOD 6
GND 7
GND 8
GND 9
RFout 10
GND 11 GND 12
GND
13
Vcc
14
GND
15
GND
16
U2
VCO
R4_IF
0 ohm
C4_IF
Open
R9
Open
R11
Open
R8
Open
R10
Open
R34
3.3 ohm
R20
3.3 ohm
R25
3.3 ohm
R4_RF
0 ohm
C4_RF
Open
Vcc_PLL
12 34 56 78
POWER
HEADER_2X4
Vcc_AMPVcc_RF
Vcc_IF
Vcc
SMA
IF_OUT
Open
OSCi n
SMA
Ftest/LD
Open
RFout
SMA
Vin 6
GND 3
Vout
1LP5900 2.5V
NC
2Ven 4
GND
0
NC
5
U4
LP5900
R31
10 ohm
R24
5.6 ohm
R13
5.6 ohm
Vcc
1
GND
2
FinIF
3
EN
4
CPoutiF
5
ENosc
6
OSCin
8
Vcc
9
Ftest/LD
10 FLoutRF 11
GND 12
CPoutRF 13
GND 14
FinRF 15
FinRF* 16
Vcc 17
LE 18
CLK 19
DATA 20
OSCout
7
U1
LMX243X
PCB
LMX2430TMEBPCB
PCB
Vout 1
V- 2
IN+ 3
IN-
4
V+
5
U5
LM6211
Vcc_AMP
Vcc_PLL
R21
100 k
R22
100 k
R23
10 ohm
C9
1 uF
C8
1 uF
R1aRF
0 ohm
Ca_LF
Open
R1bRF
Open
R1_RF
0 ohm
R35
Ferrite
R33
10 ohm
VccRFVCO
VccIFVCO
VccPLL
VccAMP
Vcc_PLL
D1
Red LED
C23
1 uF
C22
10 uF
C24
0.1 uF
C25
1 nF
Vcc_PLL
GND

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Appendix B: Build Diagram

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Top Layer

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GND Layer

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POWER Layer

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Bottom Copper

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Appendix C: Fabrication and Assembly
Board Material Rogers RO4003 (Top Layer to Ground Plane (.G1))
Remaining layers - FR4
Number of Layers 4
Board Thickness 0.062”
Copper Weight 1 oz Finished
Finish Immersion Gold
Solder Mask Color Green/Gloss
Testing 100% Electrical Testing
Name K Tand
RO4003 (16 mil) 3.38 0.0022
RO4003 (r= 3.38)
CONTROLLED THICKNESS of
16 mils thick
Top Copper. 1oz thick
[LMX2434.GTL]
GND Layer [LMX2434.G1]
FR4 (r= ~4.6)
?? mils thick, but thinner is
p
referable
POWER Layer [LMX2434.G2]
FR4
?? mils thick
Bottom Copper – Thermal relief
[LMX2434.GBL]
62 mils thick total