Directional Coupler
75Ω
5 to 600 MHz
Features
-40°C to 85°C
-55°C to 100°C
Surface Mount
LRDC-12-1-75J+
LRDC-12-1-75J
Maximum Ratings
Operating Temperature
Storage Temperature
• low mainline loss, 0.5 dB typ.
• high directivity, 21 dB typ.
• aqueous washable
• J-leads for strain relief and excellent solderability
CASE STYLE: QQQ569
PRICE: $11.95 ea. QTY (1-9)
Pin Connections
INPUT
OUTPUT
COUPLED
GROUND
ISOLATE (DO NOT USE)
6
1
4
2,5
3
Applications
+ 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.
• VHF/UHF
• signal sampling
• communications
• cable tv
Outline Drawing
Directional Coupler Electrical Specifications
FREQ.
(MHz)
COUPLING
(dB)
L
f
L
-f
U
5-600
Nom.
12.2±0.5
Flatness
±0.6
Typ.
0.4
Max.
0.8
Typ.
0.5
MAINLINE LOSS
1
(dB)
M
Max.
1.0
Typ.
0.8
U
Max.
1.5
Typ.
20
L
Min.
17
DIRECTIVITY
(dB)
M
Typ.
21
Min.
18
Typ.
20
U
Min.
12
VSWR POWER
(:1) INPUT, W
L
Typ.
1.3
MU
Max. Max.
1.0
1.0
PCB Land Pattern
L = low range [f
L
to 10 f
L
] M = mid range [10 f
L
to f
U
/2] U = upper range [f
U
/2 to f
U
]
1. Mainline loss includes theoretical power loss at coupled port.
Typical Performance Data
Frequency
(MHz)
Suggested Layout,
Tolerance to be within
±.002
Mainline Loss
(dB)
In-Out
0.68
0.67
0.66
0.67
0.69
0.71
0.77
0.79
0.84
0.92
LRDC-12-1-75J
MAINLINE LOSS
Coupling
(dB)
In-Cpl
12.25
12.24
12.24
12.24
12.26
12.27
12.28
12.20
12.11
12.05
Directivity
(dB)
27.30
27.29
27.30
27.29
25.97
23.92
22.07
20.71
19.85
19.38
In
24.93
25.25
25.59
25.75
24.35
21.73
19.81
18.62
18.13
18.26
Return Loss
(dB)
Out
36.02
37.90
41.55
45.26
29.52
23.91
20.80
19.03
18.22
18.28
Cpl
24.62
24.76
24.92
24.96
24.21
23.15
21.77
20.45
19.44
18.73
Outline Dimensions (
inch
)
mm
A
.390
9.91
H
.420
10.67
B
.31
7.87
J
.120
3.05
C
.225
5.72
K
.060
1.52
D
.060
1.52
L
.100
2.54
E
--
--
M
--
--
F
.100
2.54
G
.045
1.14
wt
grams
0.50
5.00
6.00
8.00
10.00
100.00
200.00
300.00
400.00
500.00
600.00
1.1
MAINLINE LOSS (dB)
1.0
0.9
0.8
0.7
0.6
0
at RF level of -10 dBm
40
COUPLING &
DIRECTIVITY (dB)
30
20
10
0
at RF level of -10 dBm
LRDC-12-1-75J
COUPLING & DIRECTIVITY
DIRECTIVITY
COUPLING
Demo Board MCL P/N: TB-34
Suggested PCB Layout (PL-043)
100
200
300
400
500
600
0
100
200
300
400
500
600
FREQUENCY (MHz)
FREQUENCY (MHz)
50
RETURN LOSS (dB)
at RF level of -10 dBm
LRDC-12-1-75J
RETURN LOSS
IN
OUT
CPL
Electrical Schematic
40
30
20
10
0
100
200
300
400
500
600
FREQUENCY (MHz)
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TM
®
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M119986
LRDC-12-1-75J
WZ/TD/CP/AM
081124
IF/RF MICROWAVE COMPONENTS
MINI [ MINI-CIRCUITS ]
