11/2004
APS3604
Active Splitter for CATV Set-Top Boxes
PRELIMINARY DATA SHEET - Rev 1.0
S29 Package
28 Pin QFN
5 mm x 5 mm x 1 mm
FEATURES
Single Input, Triple Output Design
- Three Video Tuner Outputs
Wideband Operation: To Above 1 GHz
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
RoHS Compliant/Lead Free
APPLICATIONS
CATV Set-Top Boxes with Multiple Tuners
PRODUCT DESCRIPTION
This active splitter from ANADIGICS accepts a
balanced RF input in the 50 MHz to 1.1 GHz 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
2
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
APS3604
V
CC
AGC
VID1
RF
IN+
1
VID2
OUT-
GND
6
5
4
3
2
7
28
22
23
24
25
26
27
8
14
13
12
11
10
9
21
16
17
18
19
20
15
RF
IN-
GND
GND
VID2
OUT+
GND
GND
GND
VID1
OUT-
VID1
OUT+
GN
D
GN
D
GN
D
AG
C
VI
D
2
AG
C
V
ID
3
OU
T
+
OU
T
-
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
VID3
VID3
N
I
P
E
M
A
N
N
O
I
T
P
I
R
C
S
E
D
N
I
P
E
M
A
N
N
O
I
T
P
I
R
C
S
E
D
1
V
C
C
e
g
a
tl
o
V
y
l
p
p
u
S
8
2
D
N
G
d
n
u
o
r
G
2
D
N
G
d
n
u
o
r
G
7
2
D
N
G
d
n
u
o
r
G
3
F
R
+
N
I
)
+
(
t
u
p
n
I
F
R
6
2
D
N
G
d
n
u
o
r
G
4
D
N
G
d
n
u
o
r
G
5
2
D
N
G
d
n
u
o
r
G
5
F
R
-
N
I
)
-
(
t
u
p
n
I
F
R
4
2
D
N
G
d
n
u
o
r
G
6
D
N
G
d
n
u
o
r
G
3
2
D
N
G
d
n
u
o
r
G
7
C
G
A
1
D
I
V
t
u
p
n
I
l
o
r
t
n
o
C
C
G
A
1
o
e
d
i
V
2
2
D
N
G
d
n
u
o
r
G
8
C
G
A
2
D
I
V
t
u
p
n
I
l
o
r
t
n
o
C
C
G
A
2
o
e
d
i
V
1
2
1
D
I
V
+
T
U
O
)
+
(
t
u
p
t
u
O
1
o
e
d
i
V
9
C
G
A
3
D
I
V
t
u
p
n
I
l
o
r
t
n
o
C
C
G
A
3
o
e
d
i
V
0
2
D
N
G
d
n
u
o
r
G
0
1
D
N
G
d
n
u
o
r
G
9
1
1
D
I
V
-
T
U
O
)
-
(
t
u
p
t
u
O
1
o
e
d
i
V
1
1
3
D
I
V
+
T
U
O
)
+
(
t
u
p
t
u
O
h
t
a
P
a
t
a
D
8
1
D
N
G
d
n
u
o
r
G
2
1
D
N
G
d
n
u
o
r
G
7
1
2
D
I
V
+
T
U
O
)
+
(
t
u
p
t
u
O
2
o
e
d
i
V
3
1
3
D
I
V
-
T
U
O
)
-
(
t
u
p
t
u
O
h
t
a
P
a
t
a
D
6
1
D
N
G
d
n
u
o
r
G
4
1
D
N
G
d
n
u
o
r
G
5
1
2
D
I
V
-
T
U
O
)
-
(
t
u
p
t
u
O
2
o
e
d
i
V
Table 1: Pin Description
Figure 2: Pinout (X-ray Top View)
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
APS3604
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
)
f
(
y
c
n
e
u
q
e
r
F
g
n
it
a
r
e
p
O
0
5
-
0
0
1
1
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
V
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
11/2004
APS3604
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
-
3
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
V
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
-
V
l
a
it
n
e
r
e
ff
i
d
PRELIMINARY DATA SHEET - Rev 1.0
11/2004
APS3604
5
PERFORMANCE DATA
Figure 3: Gain vs. Frequency
(T
A
= +25
o
C, V
CC
= + 5 V)
Figure 4: Input Return Loss vs. Frequency
(T
A
= +25
o
C, V
CC
= + 5 V)
Figure 5: Output Return Loss vs. Frequency
(T
A
= +25
o
C, V
CC
= + 5 V)
Figure 6: Reverse Isolation vs. Frequency
(T
A
= +25
o
C, V
CC
= + 5 V)
-25
-20
-15
-10
-5
0
5
10
0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
S21: Gain (dB)
+3.0 V
+2.0 V
+1.8 V
+1.6 V
+1.4 V
+1.2 V
+1.0 V
0 V
V
agc
:
-25
-20
-15
-10
-5
0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
S11: Input Return Loss (dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.8 V
Vagc = +1.4 V
Vagc = +1.0 V
Vag = 0 V
-35
-30
-25
-20
-15
-10
-5
0
0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
S22: Output Return Loss (dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.4 V
Vagc = +1.0 V
Vagc = 0 V
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
0
100
200
300
400
500
600
700
800
900
1000
1100
Frequency (MHz)
S12: Reverse Isolation (dB)
Vagc = +3.0 V
Vagc = +2.0 V
Vagc = +1.4 V
Vagc = +1.0 V
Vagc = 0 V
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