MC-7881
MC-7882
MC-7883
NEC's 870 MHz GaAs CATV
POWER DOUBLER AMPLIFIER
MC-7884
OUTLINE DIMENSIONS (Units in mm)
FEATURES
• GaAs ACTIVE DEVICES
• LOW DISTORTION
PACKAGE OUTLINE H02
• HIGH LINEAR GAIN:
45.08 MAX
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
38.1±0.25
4.25 + 0.25
27.5 MAX
- 0.35
3.2 MAX
V
DD
14.85 MAX
5
4.0±0.25
8.1 MAX
1
9
• LOW RETURN LOSS
19.05±0.38
In
Out
• LOW GAIN CHANGE OVER TEMPERATURE
6-32 unc 2B
21.5 MAX
25.4±0.25
2.54±0.25
2
3 7 8
• SPECIFIED FOR 79, 110, and 132 CHANNELS
PERFORMANCE
Gnd
0.51±0.05
• HIGH RELIABILITYAND RUGGEDNESS:
Withstands environmental extremes as well as Silicon
devices (Surge, ESD, Etc.)
1
2
3
5
7 8 9
10.75 ±0.25
2.54 ±0.38
4.19±0.13
A
DESCRIPTION
6.3
2.5
0.51±0.05
0.38.. A
NEC's MC-7881, MC-7882, MC-7883, and MC-7884 are GaAs
Multi-Chip Modules designed for use as output stages in CATV
applications up to 870 MHz. 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.
±0.05
APPLICATIONS
• CATV HEADEND SYSTEMS
• CATV OPTICAL NODES
• CATV DISTRIBUTIONAMPS
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.
ELECTRICAL CHARACTERISTICS (TA = 30±5 °C, VDD = 24 V, ZS = ZL = 75 Ω)
PART NUMBER
MC-7881
MC-7882
MC-7883
MC-7884
SYMBOLS
CHARACTERISTICS
Frequency Range
Linear Gain
UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX TEST CONDITIONS
BW
GL
S
MHz
dB
50
–
–
870 50
–
–
870 50
–
–
870 50
–
–
870
18.0
19.0 20.0
21.0 22.0
23.0 25.0
26.0 f = 870 MHz
Gain Slope
dB
0.2 0.6 1.0 0.4 0.8 1.2 0.6 1.0 1.4 0.6 1.0 1.4
f = 40 to 870 MHz
Gf
Gain Flatness
dB
–
–
0.6
–
–
0.6
–
–
0.6
–
–
0.6
40 to 870 MHz;
Peak to Valley
NF
Noise Figure 1
Noise Figure 2
Input Return Loss
dB
dB
–
–
–
–
–
–
–
–
–
–
–
6.5
7.0
–
–
–
–
–
–
–
–
–
–
–
–
6.0
6.5
–
–
–
–
–
–
–
–
–
–
–
–
5.5
6.0
–
–
–
–
–
–
–
–
–
–
–
–
5.0
5.5
–
f = 50 MHz
–
–
–
–
f = 870 MHz
RLi
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
40 to 160MHz
–
–
–
–
160 to 320 MHz
320 to 640 MHz
640 to 870 MHz
40 to 160MHz
–
–
–
–
–
–
–
–
RLo
Output Return Loss
dB
–
–
–
–
–
–
–
–
160 to 320 MHz
320 to 640 MHz
640 to 870 MHz
continued on next page
–
–
–
–
–
–
–
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