
OUTLINE DIMENSIONS
(Units in mm [inches])
ISG56518
PART NUMBER
ISG56518
SYMBOLS
PARAMETERS AND CONDITIONS
UNITS
MIN
TYP
MAX
G
A
G
RL
IN
RL
OUT
NF
CTB
XM
CSO
P
1dB
V
CC
I
OP
BW
Gain at f = 42 MHz
Gain Flatness
Input Return Loss
Output Return Loss
Noise Figure
Composite Triple Beat
1
(+50 dBmV/ch)
Cross Modulation
1
(+50 dBmV/ch)
Composite 2nd Order Distortion
1
(+50 dBmV/ch)
Output Power at 1 dB Gain Compression Point
Supply Voltage
Operating Current
Bandwidth
Input & Output Impedance
dB
dB
dB
dB
dB
dBc
dBc
dBc
dBmV
V
mA
MHz
ohms
18
18.2
18.4
±0.15
22
20
25
22
3.9
-68
-58
-75
72
24
110
4.5
-63
-54
-69
95
5
130
65
75
ELECTRICAL CHARACTERISTICS
(V
CC
= 24 V, ± 10%, T
A
= 25°C, 75 Ohm System)
Note:
1. Composite Triple Beat, Cross Modulation, 2nd Order Distortion are all measured with 7channels (T7 through T13). at 50 dBmV/ch output and
at 25°C.
45.08 [1.775] MAX
38.10
±
0.25 [1.500
±
.010]
3.49 [.137]
14.85 [.585] MAX
2
× φ
4.00
[
φ
.157+.006
]
THRU
+0.14
-0.24
27.30 [1.075] MAX
8.04 [.317]
3.96 [.156]
[
.315+.005
]
+0.13
-0.20
8.00
0.51
±
0.05 [.020
±
.002]
5.08
±
0.13 [.200
±
.005]
2.54
±
0.13 [.100
±
.005]
21.08 [.830]
10.20
±
0.25 [.402
±
.010]
25.40
±
0.25 [1.000
±
.010]
17.44 [.687]
9.84 [.387]
2
×
6-32 UNC-2B
4.20
±
0.13 [.165
±
.005]
[
.500+.010
]
+0.25
-0.89
12.70
2
× φ
[
φ
]
-.152
+4.15
-3.85
+.163
2.54
±
0.38 [.100
±
.015]
8.60
±
0.25
[.340
±
.010]
10.75
±
0.25 [.423
±
.010]
IN
OUT
GND
V
CC
1
9
2 3
5
7 8
! "
# $ %
&
'
REV. A
4/1/2005
!"
5 TO 65 MHz SILICON CATV
18 dB HYBRID AMPLIFIER
FEATURES
ISG56518
FLAT GAIN RESPONSE FROM 5 TO 65 MHz: f =
±0.2
dB
INPUT AND OUTPUT MATCHING TO 75 OHMS: R
L
= > 22 dB
LOW DISTORTION: P1dB =
78
dBmV
LOW NOISE: 3.9dB
AUTOMATED SURFACEMOUNT CONSTRUCTION
DESCRIPTION
The ISG56518 is a low noise, low distortion hybrid amplifier specified for
use in return path HFC Cable TV applications. The ISG56518 is
comprised of 100% surface mount components, including high perfor-
mance silicon transistors. It features excellent noise, gain, and thermal
stability across a wide range of operating conditions and frequencies.The
amplifiers are manufactured to ISO9002 standards, are very rugged and
exhibit excellent unit to unit uniformity.