DESCRIPTION
NEC's MC-7834-KC is a GaAs Multi-Chip Module designed
for use as input stages in CATV applications up to 870 MH
Because this unit is a GaAs device, it has low distortion, low
noise figure, and low return loss across the entire frequency
band. The MC-7834-KC is similar to NEC's standard push-pull
devices, but with the higher current allows better distortion
performance, especially X-Mod.
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 perfor-
mance, and reliability is assured by NEC's stringent quality
and process control procedures. These parts come in industry
compatible hybrid packages.
Date Published January 2007
FEATURES
• GaAs ACTIVE DEVICES
• LOW DISTORTION
• HIGH LINEAR GAIN:
• LOW RETURN LOSS
• LOW GAIN CHANGE OVER TEMPERATURE
• SPECIFIED FOR 79, 110, and 132 CHANNELS
• HIGH RELIABILITY AND RUGGEDNESS:
ELECTRICAL CHARACTERISTICS
SYMBOLS
MC-7834-KC - GL = 21 dB MIN at f = 870 MHz
PERFORMANCE
Withstands environmental extremes as well as Silicon
devices (Surge, ESD, Etc.)
XMod
CSO
CTB
BW
IDD
NF
G
RL
Gf
S
NEC's 870 MHz GaAs CATV 20 dB PUSH-PULL AMPLIFIER
L
Frequency Range
Linear Gain
Gain Slope
Gain Flatness
Noise Figure 1
Noise Figure 2
Input/Output Return Loss
Operating Current
Composite Triple Beat
Cross Modulation
Composite Second Order
CHARACTERISTICS
PART NUMBER
(T
UNITS
A
MHz
dBc
dBc
dBc
mA
= 30±5 °C, V
dB
dB
dB
dB
dB
z
.
20.0
20.0
19.0
17.5
16.0
MIN
180
0.2
DD
50
–
–
–
–
–
–
= 24 V, Z
OUTLINE DIMENSIONS
14.85 MAX
APPLICATIONS
• CATV HEADEND SYSTEMS
• CATV OPTICAL NODES
• CATV DISTRIBUTION AMPS
MC-7834-KC
4.19 ± 0.13
3.2 MAX
8.1 MAX
S
TYP
= Z
–
–
–
–
–
–
–
–
–
–
–
–
–
–
L
A
MC-7834-KC
= 75 Ω)
0.38.. A
19.05 ± 0.38
2.54 ± 0.25
1 2 3 5
27.5 MAX
45.08 MAX
38.1 ± 0.25
25.4 ± 0.25
PACKAGE OUTLINE H02
MAX
21.0
870
325
1.0
0.7
6.5
7.0
-59
-52
-59
–
–
–
–
7 8 9
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
RF OFF
f = 40 to 870 MHz; 110 Channels,
V
OUT
21.5 MAX
6-32 unc 2B
= 44 dBmV, Flat
4.0 ± 0.25
(Units in mm)
4.25
6.3
TEST CONDITIONS
±
0.05
2.5
+ 0.25
- 0.35
In
0.51 ± 0.050
1
2.54 ± 0.38
2 3 7 8
V
DD
5
Gnd
Out
9