05/2004
APS3602
Active Splitter for CATV Set-Top Boxes
PRELIMINARY DATA SHEET - Rev 1.0
S29 Package
28 Pin QFN
5mm x 5mm x 1mm
FEATURES
Single Input, Triple Output Design
- Three Video Tuner Outputs
5 dB Typical Noise Figure at 5 dB Gain
Wide Dynamic Range AGC Control,
Independent for each Tuner Path
High Linearity, Low Distortion
Single +5 V Supply
Balanced 75 Ohm Inputs/Outputs
APPLICATIONS
CATV Set-Top Boxes with Multiple Tuners
PRODUCT DESCRIPTION
This active splitter from ANADIGICS accepts a
balanced RF input in the 50 to 860 MHz frequency
range and provides three balanced RF outputs with
minimal degradation in signal quality. The single-
package surface mount device amplifies the input
signals using highly linear, low noise amplification
stages, and couples the amplified signal to three
separate output paths to drive video tuner inputs.
Each of the output paths includes independent
Automatic Gain Control (AGC). The overall linearity
Figure 1: Functional Block Diagram
of each tuner path is maintained across a wide AGC
range, ensuring low distortion effects on each output
signal.
Requiring only a single +5 Volt supply, the active
splitter design is implemented using the
ANADIGICS GaAs MESFET process. The surface
mount packaging makes the device ideal for use in
today's multiple-tuner set-top boxes for Cable TV.
VID1
OUT-
VID1
OUT+
VID2
OUT-
VID2
OUT+
VID3
OUT-
VID3
OUT+
RF
IN-
RF
IN+
AGC
VID1
AGC
VID2
AGC
VID3
PRELIMINARY DATA SHEET - Rev 1.0
05/2004
APS3602
3
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Minimum and Maximum Ratings
Stresses in excess of the absolute ratings may cause permanent damage. Functional operation
is not implied under these conditions. Exposure to absolute ratings for extended periods of
time may adversely affect reliability.
Table 3: Operating Ranges
The device may be operated safely over these conditions; however, parametric performance is guaranteed
only over the conditions defined in the electrical specifications.
R
E
T
E
M
A
R
A
P
N
I
M
X
A
M
T
I
N
U
S
T
N
E
M
M
O
C
V
(
e
g
a
tl
o
V
y
l
p
p
u
S
C
C
)
0
8
+
V
V
(
e
g
a
tl
o
V
t
u
p
n
I
C
G
A
C
G
A
)
0
5
+
V
P
(
r
e
w
o
P
t
u
p
n
I
F
R
N
I
)
-
5
2
+
V
m
B
d
5
7
o
t
n
i
l
a
it
n
e
r
e
ff
i
d
R
E
T
E
M
A
R
A
P
N
I
M
P
Y
T
X
A
M
T
I
N
U
S
T
N
E
M
M
O
C
y
c
n
e
u
q
e
r
F
g
n
it
a
r
e
p
O
0
5
-
0
6
8
z
H
M
V
(
e
g
a
tl
o
V
y
l
p
p
u
S
C
C
)
-
5
+
-
V
V
(
e
g
a
tl
o
V
t
u
p
n
I
C
G
A
C
G
A
)
3
.
0
+
-
0
.
3
+
V
V
3
+
t
a
n
i
a
g
.
x
a
m
P
(
r
e
w
o
P
t
u
p
n
I
F
R
N
I
)
5
1
-
-
5
1
+
V
m
B
d
5
7
o
t
n
i
l
a
it
n
e
r
e
ff
i
d
T
(
e
r
u
t
a
r
e
p
m
e
T
e
s
a
C
C
)
0
2
-
-
5
8
+
C
4
PRELIMINARY DATA SHEET - Rev 1.0
05/2004
APS3602
Table 4: DC Electrical Specifications
(T
C
= +25 C, V
CC
= +5 V, 75
system)
Notes:
(1) 132 channels, +6 dBmV flat output, up to +15 dBmV flat input
R
E
T
E
M
A
R
A
P
N
I
M
P
Y
T
X
A
M
T
I
N
U
S
T
N
E
M
M
O
C
n
o
it
p
m
u
s
n
o
C
t
n
e
r
r
u
C
-
5
7
1
-
A
m
y
l
p
p
u
s
V
5
+
m
o
r
f
t
n
e
r
r
u
C
e
g
a
k
a
e
L
t
u
p
n
I
C
G
A
-
0
5
-
A
t
u
p
n
i
C
G
A
h
c
a
e
Table 5: Video Tuner Path AC Electrical Specifications
(T
C
= +25 C, V
CC
= +5 V, 75
system)
R
E
T
E
M
A
R
A
P
N
I
M
P
Y
T
X
A
M
T
I
N
U
S
T
N
E
M
M
O
C
C
G
A
m
u
m
i
x
a
M
t
a
n
i
a
G
5
.
4
5
-
B
d
C
G
A
m
u
m
i
n
i
M
t
a
n
i
a
G
-
1
2
-
-
B
d
e
r
u
g
i
F
e
s
i
o
N
-
8
.
4
6
B
d
n
i
a
g
m
u
m
i
x
a
m
t
a
B
T
C
)
1
(
-
0
7
-
6
6
-
c
B
d
O
S
C
)
1
(
-
0
7
-
6
6
-
c
B
d
D
O
M
X
)
1
(
-
7
6
-
-
c
B
d
y
n
A
d
n
a
t
u
p
t
u
O
n
e
e
w
t
e
B
n
o
it
a
l
o
s
I
t
r
o
P
t
u
p
t
u
O
r
e
h
t
O
-
0
3
-
B
d
t
u
p
t
u
O
d
n
a
t
u
p
n
I
n
e
e
w
t
e
B
n
o
it
a
l
o
s
I
-
0
3
-
B
d
s
s
o
L
n
r
u
t
e
R
t
u
p
n
I
-
8
-
-
B
d
5
7
t
u
p
n
i
l
a
it
n
e
r
e
ff
i
d
e
c
n
a
d
e
p
m
I
t
u
p
t
u
O
-
5
7
-
l
a
it
n
e
r
e
ff
i
d
PRELIMINARY DATA SHEET - Rev 1.0
05/2004
APS3602
5
PERFORMANCE DATA
Figure 3: Gain vs. Frequency
(T = +25 C, V
= +5 V)
A
CC
-25
-20
-15
-10
-5
0
5
10
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
S21:
G
a
in
(dB)
Vagc = +3.0 V
Vagc = +1.0 V
Vagc = +2.0 V
Vagc = 0 V
Vagc = +1.5 V
Figure 4: Input Return Loss vs. Frequency
(T = +25 C, V
= +5 V)
A
CC
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
S1
1:
Input
Return
Loss
(
dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.5 V
Vagc = +1.0 V
Vagc = 0 V
Figure 5: Output Return Loss vs. Frequency
(T = +25 C, V
= +5 V)
A
CC
-30
-25
-20
-15
-10
-5
0
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
S22:
Output
Return
Loss
(
dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.5 V
Vagc = +1.0 V
Vagc = 0 V
Figure 6: Reverse Isolation vs. Frequency
(T = +25 C, V
= +5 V)
A
CC
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
S12:
Reverse
Isolation
(
dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.5 V
Vagc = +1.0 V
Vagc = 0 V
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