Directional Coupler
75
Ω
20 to 1000 MHz
Maximum Ratings
Operating Temperature
Storage Temperature
-40°C to 85°C
-55°C to 100°C
Surface Mount
ADC-18-4-75R+
Features
Pin Connections
INPUT
OUTPUT
COUPLED
GROUND
NOT USED
1
6
3
2,5
4
• wideband, 20-1000 MHz
• good directivity, 25 dB typ.
• excellent VSWR, 1.15:1 typ.
• internal load, no external components required
• aqueous washable
• protected by US Patent 6,133,525 & 6,140,887
• CATV power tap
CASE STYLE: CD542
PRICE: $7.95 ea. QTY (10-49)
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suffix has been added in order to identify RoHS
Compliance. See our web site for RoHS Compliance
methodologies and qualifications.
Applications
Directional Coupler Electrical Specifications
Outline Drawing
FREQ.
(MHz)
f
L
-f
U
20-1000
COUPLING
(dB)
L
Nom.
17.7±0.5
Flatness
±0.5
MAINLINE LOSS
1
(dB)
M
Typ. Max.
0.5 0.9
U
Typ. Max.
0.7 1.2
L
Typ. Min.
30
19
Typ. Max.
0.6 1.0
DIRECTIVITY
(dB)
M
Typ. Min.
25
18
U
Typ. Min.
20
11
VSWR POWER
(:1) INPUT, W
Typ.
1.15
Max.
1.0
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)
20.00
50.00
100.00
240.00
400.00
540.00
680.00
800.00
900.00
1000.00
Mainline Loss
(dB)
In-Out
0.64
0.58
0.55
0.56
0.60
0.65
0.71
0.76
0.80
0.86
ADC-18-4-75R+
MAINLINE LOSS
Coupling
(dB)
In-Cpl
17.79
17.73
17.70
17.71
17.67
17.63
17.55
17.47
17.40
17.33
Directivity
(dB)
32.89
41.84
43.88
30.92
24.83
21.34
18.57
16.59
15.17
13.84
In
20.76
24.04
25.58
27.26
27.68
28.01
29.46
31.69
35.90
42.87
Return Loss
(dB)
Out
22.00
26.77
29.90
35.24
34.53
31.80
29.91
28.56
27.62
27.02
Cpl
20.42
23.55
24.90
27.17
28.00
27.82
25.76
23.12
21.50
20.11
Suggested Layout,
Tolerance to be within ±.002
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
wt
grams
0.20
ADC-18-4-75R+
COUPLING & DIRECTIVITY
COUPLING & DIRECTIVITY
(dB)
45
37
29
21
13
0
200
400
600
FREQUENCY (MHz)
800
1000
at RF level of -4.3 dBm
0.9
MAINLINE LOSS (dB)
0.8
0.7
0.6
0.5
at RF level of -4.3 dBm
COUPLING
DIRECTIVITY
Demo Board MCL P/N: TB-356
Suggested PCB Layout (PL-213)
0
200
400
600
800
1000
FREQUENCY (MHz)
ADC-18-4-75R+
RETURN LOSS
45
RETURN LOSS (dB)
40
35
30
25
20
0
200
400
600
FREQUENCY (MHz)
800
1000
at RF level of -4.3 dBm
Electrical Schematic
IN
OUT
CPL
Mini-Circuits
TM
®
minicircuits.com
REV. A
M119986
ED-12361/1
ADC-18-4-75R+
DY/LC/CP/AM
081111
ISO 9001 ISO 14001
AS 9100
CERTIFIED
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 For detailed performance specs & shopping online see Mini-Circuits web site
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