Datasheet

AD9481
Rev. 0 | Page 25 of 28
1Y
1A 1B
COUT+
2Y
2A 2B
COUT+
3Y
3A 3B
COUT–
4Y
4A 4B
COUT–
VDL
GND
E56
E54
E55
R9
100Ω
R18
100Ω
R19
50Ω
R4
100Ω
R5
50Ω
VDL
GND
E53
E51
E52
R8
100Ω
VDL
GND
E50
E45
E46
R6
100Ω
VDL
GND
E49
E48
E47
R7
100Ω
1
3 6 8 11
U2
74VCX86
2 4 5 9
10 12 13
VDL
DR– CLKAT– DR+ CLKLAT+
14
GND
PWR GND
7
R54
X
+
C36
10µF
VAMP
VAMPF
GND
C1 X
+
C29
0.1µF
C32
10µF
VDL
GND
C26
0.1µF
C27
0.1µF
C28
0.1µF
+
C17
0.1µF
C33
10µF
AVDD
GND
C25
0.1µF
C18
0.1µF
C24
0.1µF
+
C22
0.1µF
C34
10µF
DRVDD
GND
C19
0.1µF
+
C15
0.1µF
C35
10µF
VCTRL
GND
VDL
R58
X
INHI
INLO
PWUP
RGP1 RPG2
COMM OPHI OPLO VOCM
VPOS
6
3 4
8 7
1 2 5
10 9
U1
AD8351
AMPOUT AMPOUT
GND
C7 X
GND
GND VAMPF
AMPIN
R15
X
R14
X
R12
X
R56
X
R34
X
R32
X
C23
X
C21
X
R11
X
R10
X
C30
X
C39
X
C31
X
GNDVAMPF
VAMPF
R37
X
R17
X
R36
X
X = NOT NORMALLY POPULATED XX = NOT POPULATED, USER SELECTED
OPTIONAL XTALS
R57
X
U13 XO-400
VCC 6 PECL6
OUTVCC
VEE –OUT
8
14
7
1
C40 X
VCTRL
GND
GND
CLK– CLK+
GND
GND
GND
5
6 4
2 1 3
OUTPUTB
VC
OUTPUT
E/D NC GND
R48
X
R49
X
R51 XX
R60 X
C38 X
E24 E23
AVDD
E22
VCTRL
VCTRL
GNDVCTRL
R50
XX
R59
X
GND
VCTRL
R46
X
R45
X
S1
VCTRL
GND
R42
1kΩ
R43
1kΩ
R13
1kΩ
E35 E36 E32 E39 E33 E38 E34 E37
VCTRL PWDN
E21E20
S3
E90 E89
E88
AVDD
GND
R44 1kΩ
05045-041
Figure 40. PCB Schematic (2 of 2)