07/2003
RF Input
RF Output
2A
2B
1B
1A
ACA2408
1:1
1:1
ACA2408
870 MHz, 34 dB Gain
CATV Push-Pull Line Amplifier
PRELIMINARY DATA SHEET - Rev 1.0
S7 Package
16 Pin Wide Body SOIC
with Heat Slug
PRODUCT DESCRIPTION
The ACA2408 is a highly linear, monolithic GaAs RF
amplifier that has been developed to replace, in new
designs, standard CATV hybrid amplifiers. Offered
in a convenient surface mount package, the MMIC
consists of two pairs of parallel amplifiers that are
optimized for exceptionally low distortion and noise
figure. A hybrid equivalent that provides flat gain
response and excellent input and output return loss
over the 40 to 870 MHz CATV downstream
band is formed when one ACA2408 is cascaded
between two appropriate transmission line baluns.
FEATURES
34dB Gain
Very Low Distortion
Stable with High VSWR Load Conditions
Monolithic Design for Consistent Performance
Part-to-Part
Low DC Power Consumption
Surface Mount Package Compatible with
Automatic Assembly
Low Cost Alternative to Hybrids
APPLICATIONS
Line Extenders, Apartment House Amplifiers,
System Amplifiers, Distribution Nodes
Figure 1: Hybrid Application Diagram
2
ACA2408
PRELIMINARY DATA SHEET - Rev 1.0
07/2003
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
D
N
G
d
n
u
o
r
G
6
1
D
N
G
d
n
u
o
r
G
2
A
2
N
I
t
u
p
n
I
A
2
r
e
i
f
il
p
m
A
5
1
A
1
T
U
O
t
u
p
t
u
O
A
1
r
e
i
f
il
p
m
A
3
D
N
G
d
n
u
o
r
G
4
1
A
1
s
a
i
B
r
e
i
f
il
p
m
A
A
1
r
o
f
s
a
i
B
4
A
1
N
I
t
u
p
n
I
A
1
r
e
i
f
il
p
m
A
3
1
A
2
T
U
O
d
n
a
t
u
p
t
u
O
A
2
r
e
i
f
il
p
m
A
y
l
p
p
u
S
5
B
1
N
I
t
u
p
n
I
B
1
r
e
i
f
il
p
m
A
2
1
B
2
T
U
O
d
n
a
t
u
p
t
u
O
B
2
r
e
i
f
il
p
m
A
y
l
p
p
u
S
6
I
T
E
S
t
s
u
j
d
A
t
n
e
r
r
u
C
1
1
B
1
s
a
i
B
r
e
i
f
il
p
m
A
B
1
r
o
f
s
a
i
B
7
B
2
N
I
t
u
p
n
I
B
2
r
e
i
f
il
p
m
A
0
1
B
1
T
U
O
t
u
p
t
u
O
B
1
r
e
i
f
il
p
m
A
8
D
N
G
d
n
u
o
r
G
9
D
N
G
d
n
u
o
r
G
Table 1: Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
GND
I
SET
2A
IN
GND
2B
IN
1B
IN
1A
IN
GND
GND
1B
OUT
2B
OUT
2A
OUT
1A
OUT
Bias 1A
Bias 1B
Figure 2: Pin Out
3
ACA2408
PRELIMINARY DATA SHEET - Rev 1.0
07/2003
R
E
T
E
M
A
R
A
P
N
I
M
P
Y
T
X
A
M
T
I
N
U
V
:
y
l
p
p
u
S
D
D
)
3
1
,
2
1
s
n
i
p
(
-
4
2
+
-
C
D
V
I
t
a
e
g
a
tl
o
V
T
E
S
)
6
n
i
p
(
-
3
+
-
C
D
V
y
c
n
e
u
q
e
r
F
F
R
0
4
-
0
7
8
z
H
M
e
r
u
t
a
r
e
p
m
e
T
e
s
a
C
0
4
-
-
0
1
1
+
C
R
E
T
E
M
A
R
A
P
N
I
M
X
A
M
T
I
N
U
)
3
1
,
2
1
s
n
i
p
(
y
l
p
p
u
S
0
8
2
+
C
D
V
)
5
,
4
s
n
i
p
(
s
t
u
p
n
I
t
a
r
e
w
o
P
F
R
-
5
5
+
V
m
B
d
e
r
u
t
a
r
e
p
m
e
T
e
g
a
r
o
t
S
5
6
-
0
5
1
+
C
e
r
u
t
a
r
e
p
m
e
T
g
n
ir
e
d
l
o
S
-
0
6
2
+
C
e
m
i
T
g
n
ir
e
d
l
o
S
-
0
.
5
c
e
S
ELECTRICAL CHARACTERISTICS
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.
Notes:
1. Pins 2, 4, 5 and 7 should be AC-coupled. No external DC bias should be
applied.
2. Pin 6 should be AC-grounded and/or pulled to ground through a resistor
for current control.
3. Pins 11 and 14 are bias feeds for input amplifiers 1A and 1B. No external
DC bias should be applied.
4. Pins 10 and 15 receive DC bias directly from pins 11 and 14.
Table 2: Absolute Mimimum and Maximum Ratings
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.
4
ACA2408
PRELIMINARY DATA SHEET - Rev 1.0
07/2003
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
i
a
G
)
1
(
Z
H
M
0
7
8
@
5
.
3
3
8
.
4
3
-
B
d
e
p
o
l
S
t
n
e
l
a
v
i
u
q
E
e
l
b
a
C
)
1
(
-
0
-
B
d
s
s
e
n
t
a
l
F
n
i
a
G
)
1
(
Z
H
M
0
7
8
o
t
-
2
.
0
-
B
d
e
r
u
g
i
F
e
s
i
o
N
)
1
(
-
0
.
2
0
.
4
B
d
B
T
C
)
1
(
s
l
e
n
n
a
h
C
0
1
1
)
2
(
-
0
7
-
8
5
-
c
B
d
O
S
C
)
1
(
s
l
e
n
n
a
h
C
0
1
1
)
2
(
-
8
6
-
8
5
-
c
B
d
D
O
M
X
)
1
(
s
l
e
n
n
a
h
C
0
1
1
)
2
(
-
5
6
-
5
5
-
c
B
d
s
s
o
L
n
r
u
t
e
R
t
u
p
n
I
)
1
(
)
m
e
t
s
y
s
5
7
(
-
-
-
-
-
5
2
8
2
6
2
0
2
1
2
0
2
-
-
-
5
.
5
1
-
4
1
-
B
d
z
H
M
0
8
o
t
0
4
z
H
M
0
6
1
o
t
0
8
z
H
M
0
2
3
o
t
0
6
1
z
H
M
0
4
6
o
t
0
2
3
z
H
M
0
7
8
o
t
0
4
6
s
s
o
L
n
r
u
t
e
R
t
u
p
t
u
O
)
1
(
)
m
e
t
s
y
s
5
7
(
-
-
-
-
-
7
2
4
2
0
2
7
1
7
1
0
2
-
-
-
5
.
5
1
-
4
1
-
B
d
z
H
M
0
8
o
t
0
4
z
H
M
0
6
1
o
t
0
8
z
H
M
0
2
3
o
t
0
6
1
z
H
M
0
4
6
o
t
0
2
3
z
H
M
0
7
8
o
t
0
4
6
t
n
e
r
r
u
C
y
l
p
p
u
S
-
5
2
3
0
4
3
A
m
e
c
n
a
t
s
i
s
e
R
l
a
m
r
e
h
T
-
-
5
.
4
W
/
C
Notes:
(1) Measured with baluns on the input and output of the device.
(2) Flat output, +44 dBmV per channel.
Table 4: AC and DC Electrical Specifications
(T
A
= +25
C, V
DD
= +24 VDC)
5
ACA2408
PRELIMINARY DATA SHEET - Rev 1.0
07/2003
33.0
33.5
34.0
34.5
35.0
35.5
36.0
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
PERFORMANCE DATA
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
S11
S22
Figure 4: Input and Output Return Loss
(S11 and S22) vs. Frequency
(T
A
= +25
C, V
DD
= +24 V, 75
system)
Return Loss (dB)
Figure 3: Gain (S21) vs. Frequency
(T
A
= +25
C, V
DD
= +24 V, 75
system)
Gain (dB)
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