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NEC's 870 MHz GaAs CATV
POWER DOUBLER AMPLIFIER
OUTLINE DIMENSIONS
(Units in mm)
PACKAGE OUTLINE H02
FEATURES
GaAs ACTIVE DEVICES
LOW DISTORTION
HIGH LINEAR GAIN:
MC-7881 - GL = 18 dB MIN at f = 870 MHz
MC-7882 - GL = 20 dB MIN at f = 870 MHz
MC-7883 - GL = 22 dB MIN at f = 870 MHz
MC-7884 - GL = 25 dB MIN at f = 870 MHz
LOW RETURN LOSS
LOW GAIN CHANGE OVER TEMPERATURE
SPECIFIED FOR 79, 110, and 132 CHANNELS
PERFORMANCE
HIGH RELIABILITY AND RUGGEDNESS:
Withstands environmental extremes as well as Silicon
devices (Surge, ESD, Etc.)
V
DD
9
1
In
Out
Gnd
2 3 7 8
2.54
±
0.38
21.5 MAX
1
6-32 unc 2B
2.54
±
0.25
1 2 3
5
7 8 9
4.19
±
0.13
14.85 MAX
4.25
- 0.35
4.0
±
0.25
5
10.75
±
0.25
27.5 MAX
38.1
±
0.25
45.08 MAX
0.51
±
0.05
0.51
±
0.05
2
±
0
3.2 MAX
A
0.38.. A
25.4
±
0.25
19.05
±
0.38
8.1 MAX
2.5
6.3
±
0.05
APPLICATIONS
CATV HEADEND SYSTEMS
CATV OPTICAL NODES
CATV DISTRIBUTION AMPS
MC-7882
MC-7883
MC-7884
MC-7881
ELECTRICAL CHARACTERISTICS
(T
A
= 30±5 °C, V
DD
= 24 V, Z
S
= Z
L
= 75
)
PART NUMBER
SYMBOLS
CHARACTERISTICS
UNITS
BW
Frequency Range
MHz
G
L
Linear Gain
dB
S
Gain Slope
dB
Gf
Gain Flatness
dB
MC-7881
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
50
–
870
50
–
870
18.0
–
19.0
20.0
–
21.0 22.0
0.2
0.6
1.0
0.4
0.8
1.2
–
–
0.6
–
–
0.6
MC-7882
MC-7883 MC-7884
TEST CONDITIONS
50
–
–
870
23.0
1.4
0.6
50
25.0
0.6
–
–
–
870
26.0
1.4
0.6
f = 870 MHz
f = 40 to 870 MHz
40 to 870 MHz;
Peak to Valley
f = 50 MHz
f = 870 MHz
40 to 160MHz
160 to 320 MHz
320 to 640 MHz
640 to 870 MHz
40 to 160MHz
160 to 320 MHz
320 to 640 MHz
640 to 870 MHz
continued on next page
0.6
–
1.0
–
1.0
–
NF
Noise Figure 1
Noise Figure 2
Input Return Loss
dB
–
–
–
–
–
–
–
–
–
–
–
–
6.5
7.0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
6.0
6.5
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
5.5
6.0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
5.0
5.5
–
–
–
–
–
–
–
–
RLi
dB
20.0
19.0
17.5
16.0
20.0
19.0
17.5
16.0
20.0
19.0
17.5
16.0
20.0
20.0
19.0
18.0
20.0
20.0
19.0
17.0
20.0
20.0
19.0
18.0
20.0
20.0
19.0
17.0
20.0
20.0
19.0
18.0
RLo
Output Return Loss
dB
DESCRIPTION
NEC's MC-7881, MC-7882, MC-7883, and MC-7884 are GaAs
Multi-Chip Modules designed for use as output stages in CAV
applications up to 870 MH
z
. The only difference between these
devices is gain, which is 18 dB, 20 dB, 22 dB, and 25 dB
respectively. Because these units are GaAs devices they have
low distortion, low noise figure, and low return loss across the
entire frequency band.
Like the previous generation of products, these devices sur-
vive such hazards as surge and ESD as well as their silicon
competitors, but deliver superior performance with low DC
current required. All devices are assembled and tested using
fully automated equipment to maximize consistency in part to
part performance, and reliability is assured by NEC's strin-
gent quality and process control procedures. These parts come
in industry compatible hybrid packages.