Directional Coupler
75Ω
20 to 1000 MHz
Features
-40°C to 85°C
-55°C to 100°C
Surface Mount
ADC-18-4-75+
ADC-18-4-75
Maximum Ratings
Operating Temperature
Storage Temperature
Pin Connections
INPUT
OUTPUT
COUPLED
GROUND
75Ω TERM EXTERNAL
ISOLATE (DO NOT USE)
1
6
3
2
4
5
• wideband, 20-1000 MHz
• low mainline loss, 0.4 dB typ.
• good directivity, 18 dB typ.
• excellent coupling flatness,
±0.15
dB typ.
• aqueous washable
• protected by U.S Patents 6,133,525 & 6,140,887
CASE STYLE: CD542
PRICE:$6.95 ea. QTY (10-49)
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications.
Applications
• cable tv
• communications
FREQ.
(MHz)
COUPLING
(dB)
Directional Coupler Electrical Specifications
MAINLINE LOSS
1
(dB)
L
Typ. Max.
0.4 0.8
M
Typ. Max.
0.4 1.0
U
Typ. Max.
0.5 1.2
L
Typ. Min.
17
14
Outline Drawing
DIRECTIVITY
(dB)
M
Typ. Min.
18
14
U
Typ. Min.
17
12
VSWR POWER
(:1) INPUT, W
L
Max.
1.0
MU
Max.
1.0
f
L
-f
U
20-1000
Nom.
17.4±0.5
Flatness
±0.5
Typ.
1.15
L= 20-200 MHz
M= 200-500 MHz
U= 500-1000 MHz
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
PCB Land Pattern
Frequency
(MHz)
20.60
35.30
50.00
225.00
400.00
Mainline Loss
(dB)
In-Out
0.41
0.37
0.35
0.36
0.40
0.43
0.46
0.51
0.56
0.60
Coupling
(dB)
In-Cpl
17.38
17.41
17.38
17.35
17.37
17.41
17.46
17.53
17.57
17.63
Directivity
(dB)
17.05
17.17
17.23
17.74
17.93
17.78
17.33
16.72
16.33
16.23
In
25.15
26.48
27.69
28.16
24.88
22.40
20.56
19.50
19.13
18.76
Return Loss
(dB)
Out
26.01
29.41
31.77
31.23
24.39
21.78
19.28
18.43
18.15
18.16
Cpl
19.37
21.55
22.76
26.30
30.25
33.74
44.74
34.24
27.95
26.97
Suggested Layout,
Tolerance to be within ±.002
492.00
630.00
768.00
895.00
1000.00
Outline Dimensions (
inch
)
mm
A
.272
6.91
H
.030
0.76
B
.310
7.87
J
.026
0.66
C
.220
5.59
K
.065
1.65
D
.100
2.54
L
.300
7.62
E
.112
2.84
F
.055
1.40
G
.100
2.54
INSERTION LOSS (dB)
ADC-18-4-75
MAINLINE LOSS
1.0
0.8
0.6
0.4
0.2
0.0
0
200
400
600
FREQUENCY (MHz)
800
1000
at RF level of -10 dBm
ADC-18-4-75
COUPLING & DIRECTIVITY
20
COUPLING &
DIRECTIVITY (dB)
at RF level of -10 dBm
wt
grams
0.20
COUPLING
18
DIRECTIVITY
Demo Board MCL P/N: TB-08
Suggested PCB Layout (PL-042)
16
14
0
200
400
600
FREQUENCY (MHz)
800
1000
ADC-18-4-75
RETURN LOSS
50
RETURN LOSS (dB)
40
30
20
IN
10
0
200
400
600
FREQUENCY (MHz)
800
1000
OUT
CPL
at RF level of -10 dBm
Electrical Schematic
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®
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IF/RF MICROWAVE COMPONENTS
REV. D
M119986
ED-6814/1
ADC-18-4-75
WZ/TD/CP/AM
081111
MINI [ MINI-CIRCUITS ]
