INTERNET
http://www.minicircuits.com
P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661
Distribution Centers NORTH AMERICA 800-654-7949 417-335-5935 Fax 417-335-5945 EUROPE 44-1252-832600 Fax 44-1252-837010
Mini-Circuits
Mini-Circuits ISO 9001 & ISO 14001 Certified
Typical Performance Data
Electrical Specifications
Maximum Ratings
Pin Connections
Features
very flat coupling
very broadband, multi octave
temperature stable LTCC base
all welded construction
leads attached for better solderability
micro-miniaute coupler
protected by US Patents 6,140,887 & 6,784,521
INPUT
3
OUTPUT
4
COUPLED
1
GROUND
2
ISOLATE (DO NOT USE)
6
Applications
CATV
Operating Temperature
-40C to 85C
Storage Temperature
-55C to 100C
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl
Directivity
(dB)
Return Loss
(dB)
In
Cpl
Out
DBTC-20-4-75+
MAINLINE LOSS
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
250
500
750
1000
1250
FREQUENCY (MHz)
M
A
I
N
L
I
N
E
L
O
S
S
(
d
B
)
at RF level of -10 dBm
DBTC-20-4-75+
COUPLING & DIRECTIVITY
5
10
15
20
25
0
250
500
750
1000
1250
FREQUENCY (MHz)
COUPLING & DIRECTIVITY
(dB)
COUPLING
DIRECTIVITY
at RF level of -10 dBm
DBTC-20-4-75+
RETURN LOSS
0
10
20
30
40
50
0
250
500
750
1000
1250
FREQUENCY (MHz)
R
E
T
U
R
N
L
O
S
S
(
d
B
)
IN
OUT
COUPLING
at RF level of -10 dBm
electrical schematic
INPUT
OUTPUT
COUPLED
Directional Couplers
Surface Mount
FREQ.
(MHz)
COUPLING
(dB)
MAINLINE LOSS
*
(dB)
DIRECTIVITY
(dB)
VSWR**
(:1)
POWER
INPUT
(W)
Max.
Flatness
L
M
U
U
1
L
M
U
U
1
L
Max.
MUU
1
Max.
Nom.
Typ. Max. Typ. Max. Typ. Max. Typ. Max. Typ. Min. Typ. Min. Typ. Min. Typ. Min.
Typ.
5-1250
20.50.5
0.9
0.4
0.7
0.6
0.9
0.8
1.2
1.1
1.5
20
16
19
13
11
7
9
6
1.4
0.5
1.0
L = 5-50 MHz M = 50-500 MHz U = 500-1000 MHz U
1
= 1000 - 1250 MHz
* Includes theoretical coupled power loss of 0.04 dB at 20 dB coupling
** For coupled port VSWR above 500 MHz, 1.6:1 typ.
Demo Board MCL P/N: TB-279
Suggested PCB Layout (PL-151)
No Leads
CASE STYLE:AT790-1
PRICE:$1.99 ea. QTY (25)
$1.69 ea. QTY (1000)
Leads
CASE STYLE:AT1030
PRICE: $2.14 ea. QTY (25)
$1.84 ea. QTY (1000)
DBTC-20-4-75+ DBTC-20-4-75L+
Outline Drawing / Dimensions ( )
inch
mm
AT1030 (DBTC-20-4-75L)
AT790-1 (DBTC-20-4-75)
+ 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.
A
B
C
D
E
F
G
H
J
K
wt
.150
.150
.150
.050
.030
.025
.028
.050
.160
.030 grams
3.81
3.81
3.81
1.27
0.76
0.64
0.71
1.27
4.06
0.76
0.10
A
B
C
D
E
F
G
H
J
K
L
wt
.166
.150
.155
.050
.037
.025
.012
.060
.184
.030
.004 grams
4.22
3.81
3.94
1.27
0.94
0.64
0.30
1.52
4.67
0.76
0.10
0.10
PCB Land Pattern
Suggested Layout,
Tolerance to be within
.002
PCB Land Pattern
Suggested Layout,
Tolerance to be within
.002
REV. H
M98898
DBTC-20-4-75+ ED-10793/1
DBTC-20-4-75L+ ED-10793A/1
WZ/TD/CP
060726
75
, 20dB coupling, 5 to 1250 MHz
5.00
0.44
20.47
19.75
25.31
27.17
23.11
10.00
0.41
20.40
20.84
27.21
29.99
24.93
100.00
0.46
20.44
21.31
25.84
28.18
21.27
400.00
0.61
20.30
17.52
17.30
17.77
11.54
600.00
0.74
19.99
14.13
15.36
15.44
8.94
800.00
0.85
19.98
11.96
14.44
14.31
7.43
1000.00
0.98
20.07
10.26
13.93
13.80
6.52
1050.00
1.01
20.13
10.01
13.85
13.76
6.23
1100.00
1.06
20.21
9.66
13.53
13.35
6.08
1250.00
1.18
20.53
8.81
13.22
12.20
5.55
PDF 
ZIP