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SNAU136 Datasheet(PDF) 9 Page - Texas Instruments

Part No. SNAU136
Description  The Texas Instruments LMX2581EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMX2581 Wideband Frequency Synthesizer.
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SNAU136 Datasheet(HTML) 9 Page - Texas Instruments

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November 2012
SNAU136
9
4.
Schematic
1
1
2
2
3
3
4
4
5
5
6
6
D
D
C
C
B
B
A
A
1
1
LMX2581
7/11/2012
LMX2581.SchDoc
Sheet Title:
Size:
Schematic:
Mod. Date:
File:
Rev:
Sheet:
of
B
Texas Instruments and/or its licensors do not warrant the accuracy or completeness of this
specification or any information contained therein. Texas Instruments and/or its licensors do not
warrant that this design will meet the specifications, will be suitable for your application or fit for
any particular purpose, or will operate in an implementation. Texas Instruments and/or its
licensors do not warrant that the design is production worthy. You should completely validate
and test your design implementation to confirm the system functionality for your application.
http://www.ti.com
Contact: http://www.national.com/support
LMX2581 Eval Board
Project:
Designed for: Public Release
870600694
A
Assembly Variant: Customer (LMX2581B2EVK)
© Texas Instruments 2012
uWire
HEADER_2X5(POLARIZED)
GND
3
Vtune
2
GND
1
GND
4
GND
9
Fout
10
GND
11
GND
12
U100
DNP
DNP
VccPlane
VccPlane
VccPlane
VccAux
VccPlane
VccPlane
100pF
C17
10k
R51
10k
R43
10k
R45
12k
R50
12k
R44
12k
R46
C114
DNP
DNP
0
R4_LF
0
R35
120
R33
0
R29
0
R36
0
R34
0
R26
0
R28
0
R20
0
R23
33
R15
18
R12
DNP
18
R14
0
R22
100pF
C19
51
R52
51
R53
270
R3_LF
3300pF
C3_LF
DNP
R114
DNP
100pF
C9
C4_LF
DNP
DNP
10k
R38
330
R18
100pF
C8
0
R17
VccPlane
100pF
C102
DNP
0
R9
0
R106
DNP
VccAux
47
R13
1µF
C1
0
R3
DNP
100pF
C27
100pF
C25
2
3
4
5
RFoutA+
142-0701-851
1
MUXout
142-0701-851
DNP
1
LD
142-0701-851
DNP
1µF
C23
1µF
C24
2
3
4
5
RFoutA-
142-0701-851
100pF
DNP
18
R104
DNP
18
R103
DNP
18
R105
DNP
2
Fin
142-0711-201
DNP
VccPlane
Vtune
100pF
C28
100pF
C30
100pF
C26
2
3
4
5
RFoutB+
142-0701-851
2
3
4
5
RFoutB-
142-0701-851
VccPlane
100pF
C29
3.3µF
C16
2
3
4
5
OSCin
142-0701-851
10
R4
VccPlane
600694 003
551
PCB Part Number:
Rev A
-
0
R107
DNP
VccPlane
1
Vcc
142-0701-851
Mechanical Information
- Standoffs are mounted in 4 holes in the edge of the board
- Official TI logo and manufacturing information is also included.
Power Information
- VccAux is an unregulated supply that can be used to run external components like the VCO and TCXO
- VccPlane can be regulated or direct from the SMA connector and is the main chip supply
External VCO
- An external VCO can be used to hit the most demanding phase noise specifications.
Vtune
Open
R101
DNP
Open
R112
DNP
Open
R109
DNP
Open
R100
DNP
C105
DNP
DNP
VccPlane
VccAux
C106
DNP
DNP
C104
DNP
DNP
C103
DNP
DNP
Vtune_TP
Loop Filter
0
R113
DNP
4
3
1
V+
V-
U101
LM6211MF
DNP
68
R102
DNP
SO3
0.375" Standoff
SO1
0.375" Standoff
SO2
0.375" Standoff
330
R19
DNP
10µF
C11
430
R2pLF
DNP
22µF
C12
10µF
C13
0.01µF
C15
DNP
C14
22µF
D2
Green
D1
Green
MUXout_TP
LD_TP
12k
R41
10k
R47
DNP
12k
R49
100pF
C20
100pF
C112
DNP
100pF
C110
DNP
100pF
C111
DNP
12k
R42
DNP
VccPlane
12k
R48
VccPlane
LD_uWire
MUXout_uWire
MUXout_uWire
LD_uWire
18 nH
L1
18 nH
L2
Open
R108
DNP
390
R2_LF
0.056µF
C2_LF
1800pF
C1_LF
C113
DNP
DNP
0
R110
DNP
Fin
18nH
L3
DNP
100pF
C21
DNP
18nH
L4
DNP
51
R39
DNP
51
R40
DNP
100pF
C22DNP
Out
3
GND
2
Vcont
1
Vcc
4
Y2
TCXO
DNP
Out
3
GND
2
Vcont
1
Vcc
4
Y1
TCXO
Y1, Y2 and Y3 share footprint
space and only one can be
placed at a time.
IN
4
ADJ
6
GND
3
NC
7
SD
8
DAP
9
OUT
5
BYP
1
NC
2
U2
LP3878SD-ADJ
LP3878-ADJ 3.3 V component values:
C3 = 4.7 uF
R7= 51 k
C4 = 0.01 uF
R53= 866
C28 = 10 uF
R52= 2.00 k
C27 = 2.2 nF
51k
R10
0.01µF
C7
2.00k
R11
866
R16
4.7µF
C3
1µF
C5
2200pF C4
10µF
C6
VccAux
1
VccAux
142-0701-851
DNP
0
R7
DNP
VccPlane
FLout_TP
1
1
2
2
J1
TERMBLOCK
DNP
Out
3
GND
2
Vcont
1
Vcc
4
Y3
TCXO
DNP
GND
1.00k
R5
DNP
1.00k
R6
DNP
0.1µF
C2
DNP
VccAux
0
R1
DNP
Open
R2
DNP
VccPlane
0
R8
DNP
0
R54
DNP
0
R55
LOGO
PCB
Texas Instruments
LOGO
PCB
ESD Susceptible
SO4
0.375" Standoff
0
R30
0
R21
100pF
C18
0
R31
GND_OSC
GND_OSC
GND_OSC
GND_OSC
GND_OSC
GND_OSC
GND_OSC
GND_OSC
GND_OSC
0
R32
2.2µF
C31
VccPlane
C32
DNP
0.1µF
C33
DNP
0.1µF
C34
DNP
0.1µF
C35
DNP
1µF
C36
DNP
1µF
C37
DNP
1µF
C38
DNP
1µF
C39
DNP
33pF
C40
DNP
33pF
C41
DNP
33pF
C42
DNP
33pF
C43
DNP
CLK
1
DATA
2
LE
3
CE
4
FLout
5
VccCP
6
CPout
7
GND
8
VccVCO
17
GND
18
VbiasVCO
19
Vtune
20
GND
21
VrefVCO
22
VbiasCOMP
23
VregVCO
24
U?
Used in BOM report
Figure 2: LMX2581EVM Schematic


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