Texas Instruments CDCM6208, User Manual

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PRIMARY REFERENCE INPUT
SECONDARY REFERENCE INPUT
FILTER 1
FILTER 2
FILTER 3
FILTER 4
LOOP FILTER
25MHz for V1 EVM
30.72MHz for V2 EVM
V1: C1=100pF, R2=500, C2=22nF (BW = 300kHz when
PFD=25MHZ, ICP=2.5mA,R3=100, C3=242.5pF)
V2: C1=470pF, R2=560, C2=100nF (BW = 300kHz when
PFD=30.72MHZ, ICP=2.5mA,R3=100, C3=242.5pF)
Input jumpers
Connect center pin to
* 0.9V for 1.8V LVDS
* 1.2V for LVDS
* GND for LVCMOS
* DVDD for CML - also replace
series caps with 0 ohms
V1: C1=1uF, R2=1.3k, C2=22uF (BW = 50Hz when
PFD=8kHZ, ICP=500uA,R3=4010, C3=562.5pF)
V2: C1=5uF, R2=100, C2=100uF (BW = 100Hz when
PFD=80kHZ, ICP=500uA,R3=4010, C3=562.5pF)
V1: C1=4.7uF, R2=145, C2=47uF (BW = 40Hz when
PFD=40kHZ, ICP=500uA,R3=4010, C3=562.5pF)
V2: C1=4.7uF, R2=10, C2=100uF (BW = 600Hz when
PFD=9.6MHZ, ICP=500uA,R3=4010, C3=562.5pF)
V1: C1=220pF, R2=400, C2=22nF (BW = 300kHz when
PFD=30.72MHZ, ICP=2.5mA,R3=100, C3=242.5pF)
V2: C1=200pF, R2=400, C2=22nF (BW = 300kHz when
PFD=25MHZ, ICP=2.5mA,R3=100, C3=242.5pF)
DVDD
1p2V
0p9V
DVDD
1p2V
0p9V
PRI_REFP 2
PRI_REFN 2
SEC_REFP 2
SEC_REFN 2
ELF
2
R89
DNI
1 2
R73
0.0 R73
0.0
1
2
C25
1uF
C25
1uF
R88
1.3k
1 2
C27
10pF
C27
10pF
C30
1uF
C30
1uF
R72
0.0 R72
0.0
1
2
SW5 SW5
TDA04H0SK1
1
2
8
7
3
4
6
5
220pF
C20
220pF
C26
1uF
C26
1uF
5
JMP10
Header T 5pin
JMP10
Header T 5pin
R83
49.9
1 2
22nF
C19
22nF
C48 DNI
25MHz
Y1
25MHz
Y1
NX3225SA 25MHz
1
1
GND1
2
3
3
GND0
4
R87 R87
DNI
1 2
R75 R75
400
1 2
1uF
C297
1uF
C49
DNI C49
DNI
M S A
R V E
J18
M S A
R V E
J18 1
2,3,4,5
JMP11
Header T 5pin
5
JMP11
Header T 5pin
0
R81 0
1 2
100pF
C18
100pF
M S A
R V E
J20
M S A
R V E
J20 1
R85
49.9
1 2
M S A
R V E
J19
M S A
R V E
J19 1
C29
1uF
C29
1uF
R84
49.9
1 2
C22
4.7uF
22nF
C17
22nF
R86
49.9
1 2
C21 47uF
C50 DNI
C28
10pF C28
10pF
R74 R74
500
1 2
1uF
C24
1uF
M S A
R V E
J21
M S A
R V E
J21 1
R76 R76
145
1 2
C23 22uF
1uF
C296
1uF
2,3,4,5
2,3,4,5
2,3,4,5
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CDCM6208V2 EVM Board Schematic
Figure 6. CDCM6208V1/CDCM6208V2 EVM Reference Inputs
13 SCAU049 – May 2012 CDCM6208 Evaluation Board
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