MC-7847-KC
NEC's 870 MHz GaAs CATV
25 dB POWER DOUBLER AMPLIFIER
FEATURES
• GaAs ACTIVE DEVICES
• LOW DISTORTION
• HIGH LINEAR GAIN:
MC-7847-KC - 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.)
OUTLINE DIMENSIONS
(Units in mm)
PACKAGE OUTLINE H02
45.08 MAX
38.1±0.25
3.2 MAX
27.5 MAX
4.25
+ 0.25
- 0.35
V
DD
14.85 MAX
4.0±0.25
8.1 MAX
19.05±0.38
6-32 unc 2B
0.51±0.05
21.5 MAX
12.9 MAX
5
1
In
9
Out
25.4±0.25
2.54±0.25
2 3 7 8
Gnd
NEC's MC-7847-KC is a GaAs Multi-Chip Modules designed
for use as output stages in CATV applications up to 870 MH
z
.
This is a high gain device offering 25 dB minimum gain at
870 MHz. Because this unit is a GaAs device it has low dis-
tortion, low noise figure, and low return loss across the entire
frequency band.
The MC-7847-KC is similar to NEC's standard push-pull
devices, but the higher current allows for 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 performance, and reliability is assured by NEC's stringent
quality and process control procedures. These parts come in
industry compatible hybrid packages.
2.62±0.35
DESCRIPTION
1 2 3
5
7 8 9
10.75 ±0.25
4.19±0.13
A
0.38.. A
0.51±0.05
6.3
2.5
2.54 ±0.38
±0.05
APPLICATIONS
• CATV HEADEND SYSTEMS
• CATV OPTICAL NODES
• CATV DISTRIBUTION AMPS
ELECTRICAL CHARACTERISTICS
(T
A
= 30±5 °C, V
DD
= 24 V, Z
S
= Z
L
= 75
Ω)
SYMBOLS
BW
G
L
S
Gf
NF
RLi
PART NUMBER
CHARACTERISTICS
Frequency Range
Linear Gain
Gain Slope
Gain Flatness
Noise Figure 1
Noise Figure 2
Input Return Loss
UNITS
MHz
dB
dB
dB
dB
dB
MIN
50
25.0
1.0
–
–
–
20.0
20.0
19.5
17.0
20.0
350
–
–
–
MC-7847-KC
TYP
–
–
1.4
–
–
–
–
–
–
–
–
–
–
–
–
MAX
870
26.0
1.8
0.6
5.5
6.0
–
–
–
–
–
420
-60
-55
-63
TEST CONDITIONS
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
RF OFF
110 Channels
V
OUT
= 50 dBmV at 745.25 MHz, 10 dB
tilted across the band
1. Measured per US standard methods and procedures (using selective level meter).
Date Published January 2007
RL
O
I
DD
CTB
XMod
CSO
Output Return Loss
Operating Current
Composite Triple Beat
Cross Modulation
1
Composite Second Order
mA
mA
dBc
dBc
dBc
CEL [ CALIFORNIA EASTERN LABS ]
