ature stable LTCC base
all welded construction
leads attached for better solderability
micro-miniature coupler
protected by US Patents, 6,140,887 & 6,784,521
Applications
VHF/UHF receivers/transmitters
cellular
INPUT
3
OUTPUT
4
COUPLED
1
GROUND
2
ISOLATE (DO NOT USE)
6
Operating Temperature
-40°C to 85°C
Storage Temperature
-55°C to 100°C
Frequency
(MHz)
Mainline Loss
(dB)
In-Out
Coupling
(dB)
In-Cpl
Directivity
(dB)
Return Loss
(dB)
In
Cpl
Out
DBTC-12-4+
MAINLINE LOSS
0.0
0.4
0.8
1.2
1.6
2.0
5
204
403
602
801
1000
FREQUENCY (MHz)
M
A
I
N
LI
NE LO
SS (
d
B)
at RF level of -10 dBm
DBTC-12-4+
COUPLING & DIRECTIVITY
10
15
20
25
30
35
40
5
204
403
602
801
1000
FREQUENCY (MHz)
CO
UPLI
NG
&
DI
RECTI
VI
TY (
d
B)
COUPLING
DIRECTIVITY
at RF level of -10 dBm
DBTC-12-4+
RETURN LOSS
0
10
20
30
40
50
5
204
403
602
801
1000
FREQUENCY (MHz)
RETURN LO
SS (
d
B)
IN
OUT
CPL
at RF level of -10 dBm
electrical schematic
INPUT
OUTPUT
COUPLED
50
, 12dB coupling,
5 to 1000 MHz
Directional Couplers
Surface Mount
FREQ.
RANGE
(MHz)
COUPLING
(dB)
MAINLINE LOSS*
(dB)
DIRECTIVITY
(dB)
VSWR**
(:1)
POWER
INPUT
(W)
Max.
Flatness
L
M
U
L
M
U
L
MU
f
L
-f
U
Nom.
Typ. Max. Typ. Max. Typ.
Max.
Typ.
Min.
Typ.
Min.
Typ.
Min.
Typ.
Max.
Max.
5-1000
12.2±0.5
±0.9
0.9
1.8
0.7
1.3
1.1
1.6
33
22
21
14
15 1.2
0.5
1.0
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
]
* Includes theoretical coupled power loss of 0.27 dB at 12 dB coupling
** For coupled port VSWR above 500 MHz, 1.5:1 MHz
Demo Board MCL P/N: TB-278
Suggested PCB Layout (PL-150)
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-12-4+
DBTC-12-4L+
Outline Drawing / Dimensions ( )
inch
mm
AT1030 (DBTC-12-4L)
AT790-1 (DBTC-12-4)
+ RoHS compliant in accordance
with EU Directive (2002/95/EC)
The +Suf x has been added in order to identify RoHS
Compliance. See our web site for RoHS Compliance
methodologies and quali cations.
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. G
M98898
DBTC-12-4+
ED-8954/1
DBTC-12-4L+
ED-8954A
WZ/TD/CP
060505

5.00
0.88
12.07
34.34
19.19
23.31
17.81

10.00
0.79
11.96
34.86
21.25
27.96
19.68

50.00
0.73
11.90
35.53
22.99
35.09
21.01

100.00
0.75
11.93
37.41
22.94
34.58
21.11

500.00
0.85
11.99
25.82
22.00
26.19
18.96

600.00
0.88
11.99
22.32
21.56
25.58
17.94

800.00
0.95
12.03
17.75
20.94
25.46
15.62

900.00
1.00
12.07
16.15
20.79
26.14
14.55

1000.00
1.06
12.13
14.74
20.48
26.70
13.43