HIGH GAIN CATV
POWER DOUBLER AMPLIFIER
MC-7842
MC-7843
OUTLINE DIMENSIONS
(Units in mm)
PACKAGE OUTLINE H02
FEATURES
GALLIUM ARSENIDE ACTIVE DEVICES
HIGH GAIN/LOW DISTORTION
MC-7842: 22 dB Linear Gain
MC-7843: 24 dB Linear Gain
LOW DC CURRENT DRAW
375 mA MAX DC Current (360 TYP)
LOW GAIN CHANGE OVER TEMP
0.5 dB TYP change from -30 to +100
C
HIGH RELIABILITY/RUGGEDNESS
Withstands environmental extremes as well as Silicon
devices (surge, ESD, etc.)
INDUSTRY COMPATIBLE PACKAGE
DESCRIPTION
The MC-7842 and MC-7843 are GaAs hybrid integrated cir-
cuits designed to be used as the output stage in CATV cable
distribution amplifier applications up to 870 MH
z.
The only dif-
ference between the MC-7842 and the MC-7843 is gain of
about 22 dB and 24 dB respectively. With this product, NEC
has made significant advancements to their initial power dou-
bler product offering, including lower distortion, higher crash
point, less variation in gain over temperature, a reduction in
out of band gain at the high end, and improved ability to sur-
vive an overdrive. Like the previous products, these devices
survive such hazards as surge and ESD as well as their sili-
con 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. Both parts
come in industry compatible hybrid packages.
V
DD
9
1
In
Out
Gnd
2 3 7 8
2.54
0.38
21.5 MAX
12.9 MAX
6-32 unc 2B
2.54
0.25
1 2 3 5
7 8 9
4.19
0.13
14.85 MAX
4.25
+ 0.25
- 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
2.62
0.35
3.2 MAX
A
0.38.. A
25.4
0.25
19.05
0.38
8.1 MAX
2.5
6.3
0.05
California Eastern Laboratories
PART NUMBER
MC-7842
MC-7843
SYMBOLS
PARAMETERS
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
CONDITIONS
BW
Frequency Range
MHz
50
870
50
870
G
L
Linear Gain
dB
22.0
23.5
24.0
25.5
f = 870 MHz
S
Gain Slope
dB
0.3
0.9
1.5
0.3
0.9
1.5
50 to 870 MHz
G
f
Gain Flatness
dB
1.0
1.0
50 to 870 MHz;
Peak to Valley
NF
Noise Figure
dB
6.3
6.0
50 MHz
dB
6.8
6.5
870 MHz
I
DD
Operating Current, P
IN
= none
dB
275
375
275
375
CTB
Composite Triple Beat Distortion
dBc
-64
-60
-64
-60
X-Mod
Cross Modulation
1
dBc
-60
-55
-60
-55
CSO
Composite Second Order Distortion
dBc
-66
-63
-66
-63
R
L
in/out
Input/Output Return Loss
dB
20.0
20.0
40 to 160 MHz
dB
19.0
19.0
160 to 320 MHz
dB
17.5
17.5
320 to 640 MHz
dB
16.0
16.0
640 to 870 MHz
ELECTRICAL CHARACTERISTICS
(T
CASE
= 30
C, V
DD
= 24 V, Z
S
= Z
L
= 75
)
110 channels,
Vout = +50dBmV,
at 745.25 MHz,
10dB tilted across
the band.
Note:
1. Measured per US standard methods and procedures (using selective level meter).
MC-7842, MC-7843
EXCLUSIVE NORTH AMERICAN AGENT FOR RF, MICROWAVE & OPTOELECTRONIC SEMICONDUCTORS
CALIFORNIA EASTERN LABORATORIES
Headquarters
4590 Patrick Henry Drive
Santa Clara, CA 95054-1817
(408) 988-3500
Telex 34-6393
FAX (408) 988-0279
24-Hour Fax-On-Demand: 800-390-3232 (U.S. and Canada only)
Internet: http://WWW.CEL.COM
07/10/2002
DATA SUBJECT TO CHANGE WITHOUT NOTICE
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
2. Maximum single channel power applied to the input for 1 minute
with no measurable degradation in performance.
ABSOLUTE MAXIMUM RATINGS
1
(T
CASE
= 30
C)
SYMBOLS
PARAMETERS
UNITS
RATINGS
V
DD
Supply Voltage
V
30
V
i
Input Voltage
2
dBmV
65
T
C
Operating Case Temperature
C
-30 to +100
T
STG
Storage Temperature
C
-40 to +100
Life Support Applications
These NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably
be expected to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and
agree to fully indemnify CEL for all damages resulting from such improper use or sale.
1. The space between PC board and root of the lead should be
kept more than 1 mm to prevent undesired stress on the lead and
also should be kept less than 4 mm to prevent undesired parasitic
inductance.
Recommended space is 2.0 to 3.0 mm typical.
2. Recommended torque strength of the screw is 59 to 78 Ncm.
3. Form the ground pattern as wide as possible to minimize ground
impedance. (to prevent undesired oscillation)
All the ground pins must be connected together with wide ground
pattern to decrease impedance difference.
NOTES ON CORRECT USE
This product should be soldered in the following recommended
conditions. Other soldering methods and conditions than the
recommended conditions are to be consulted with our sales
representatives.
RECOMMENDED SOLDERING CONDITIONS
Soldering
Soldering
Condition
Method
Conditions
Symbol
Pin Part Heating
Pin area temperature: less
than 260
C
1
Hour: Within 2 sec./pin
Note.
1. The point of pin part heating must be kept at a distance of more
than 1.2 mm from the root of lead.
Note:
1. Test Condition: 110 channels, 10 dB tilted across the band.
RECOMMENDED OPERATING CONDITIONS
(Z
S
= Z
L
= 75
)
SYMBOLS
PARAMETERS
UNITS
MIN
TYP MAX
V
DD
Supply Voltage
V
23.5
24.0 24.5
V
i
Input Voltage
1
MC-7842
dBmV
27.0 31.5
MC-7843
dBmV
25.0 29.5
T
C
Operating Case
C
-30
+25
+85
Temperature
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