L M K 0 4 9 0 6 E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S
SNAU126
44
Reference Inputs (CLKin0, CLKin1 & CLKin2), External VCXO (OSCin) & VCO Circuits
1
1
2
2
3
3
4
4
5
5
6
6
D
D
C
C
B
B
A
A
5
8
Clock Inputs
1/25/2012
InClks.SchDoc
Sheet Title:
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Schematic:
Mod. Date:
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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.
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Contact:
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LMK049xx Evaluation Board
Project:
Designed for:
Evaluation Customer
870
600738
1
Assembly Variant:
12-21-2011
© Texas Instruments CopyrightYear
0.1µF
C15
18
R19
270
R20
0.1µF
C19
0.1µF
C14
DNP
100pF
C20
DNP
FBCLKin/CLKin1 Impedance Matching and Attenuation
CLKin1
0
R2
270
R4
DNP
0.1µF
C2
0.1µF
C10
0.1µF
C6
DNP
100
R5
0.1µF
C1
0
R8
0.1µF
C9
CLKin0 Impedance Matching and Attenuation
270
R11
DNP
0.1µF
C11
DNP
0.1µF
C25
0.1µF
C28
270
R29
DNP
270
R33
DNP
CLKin2 Impedance Matching and Attenuation
Vcc_VCO
100pF
C17
DNP
0.1µF
C16
0
R15
DNP
CLKin0_P
CLKin0_N
CLKin1_P
CLKin1_N
CLKin2_P
CLKin2_N
0.1µF
C27
0.1µF
C24
0
R27
0
R31
270
R28
DNP
270
R32
DNP
100
R30
GND
3
Vtune
2
GND
1
G
N
D
7
M
o
d
6
G
N
D
5
G
N
D
8
GND
4
GND
9
Fout
10
GND
11
GND
12
G
N
D
13
V
c
c
14
G
N
D
15
G
N
D
16
U3
CRO2949A-LF
DNP
0.1µF
C21
DNP
0.1µF
C18
DNP
0
R24
DNP
10k
R25
DNP
10k
R26
DNP
Vcc_VCO_OpAmp
0
R23
DNP
Vcc_VCO_OpAmp
4
3
2
1
5
V+
V-
U4
LMP7731MF
DNP
VCO_Vtune
PLL2 External VCO Loop Filter
Vcc_VCO_LDO
0.1µF
C23
DNP
0
R22
DNP
270
R21
0.1µF
C22
DNP
CLKin0*
SMA
CLKin0
SMA
FBCLKin*/CLKin1*
SMA
CLKin2*
SMA
CLKin2
SMA
CLKin2_2_N
CLkin2_2_P
CLKin0_2_N
CLKin0_2_P
0.1uF
C29
DNP
270
R10
DNP
270
R3
DNP
Vtune
1
NC
2
GND
3
RF
4
RF*
5
Vs
6
U2
CVHD-950-122.88
OSCin VCXO
8.2
R12
DNP
8.2
R9
DNP
140
R7
DNP
0
R14
0.1µF
C7
DNP
0.1µF
C13
DNP
0.1µF
C12
0.1µF
C8
DNP
120
R1
OSCin_1_N
OSCin_1_P
OSCin
SMA
DNP
OSCin*
SMA
DNP
10µF
C3
2200pF
C4
82pF
C5
Switch capacitor for signal
(shared pad)
Switch capacitor for signal
(shared pad)
0
R16
Vtune_VCXO
VCC_VCXO_TP
Vcc_VCXO
0.1uF
C26
DNP
CLKin2_1_P
CLKin2_1_N
0
R13
140
R6
DNP
120
R17
DNP
120
R18
DNP