64
3
TERMINALS (Top View)
Orientation in Tape
The ITF SMD 3dB 90° Coupler is based on thin-film multilayer
technology. The technology provides a miniature part with excellent
high frequency performance and rugged construction for reliable
automatic assembly.
The ITF 3dB 90° Coupler is offered in a variety of frequency bands
compatible with various types of high frequency wireless
systems.
APPLICATIONS
• Balanced Amplifiers and
Signal Distribution in
Mobile Communications
L
A
BW
T
DIMENSIONS:
millimeters (inches) Bottom View
L2.03±0.10
(0.080±0.004)
W1.55±0.10
(0.061±0.004)
T0.98±0.15
(0.037±0.006)
A0.56±0.25
(0.022±0.010)
B0.35±0.15
(0.014±0.006)
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
GENERAL DESCRIPTION
ITF TECHNOLOGY
1.76
(0.069)
2.24 (0.088)
GROUND
0.70
(0.028)
0.64
(0.025)
0.15 (0.006) TYP.
50
OHM
IN
OUT1
OUT2
50
OHM
Code Letter
Marking
IN
OUT1
OUT2
FEATURES
• Miniature 0805 size
• Low I. Loss
• High Isolation
• Power Handling:
10W RF CW
• Surface Mountable
• Supplied on Tape and Reel
• Operating Temperature
-40°C to +85°C
Recommended Pad Layout Dimensions mm (inches)
Part Number** Frequency FOI. Loss @ FOPhase Balance Code Letter
[MHz] [dB] [deg] max. Marking
DB0805A0880AWTR 880±30 0.35 3 Y
DB0805A0915AWTR 915±30 0.35 3 V
DB0805A0967AWTR 967±30 0.35 3 V
DB0805A1350AWTR 1350±50 0.35 3 C
DB0805A1650AWTR 1650±50 0.35 3 F
DB0805A1800AWTR 1800±50 0.30 3 F
DB0805A1850AWTR 1850±50 0.30 3 K
DB0805A1900AWTR 1900±50 0.30 3 K
DB0805A1950AWTR 1950±50 0.25 3 K
DB0805A2140AWTR 2140±50 0.25 3 L
DB0805A2325AWTR 2325±50 0.25 3 T
ELECTRICAL PARAMETERS*
*With Recommended Pad Layout
Important: All intermediate frequencies within the
indicated range are readily available.
** LEAD FREE TERMINATION
PART NUMBERS:
DB0805AxxxxASTR
LEAD-FREE COMPATIBLE
COMPONENT
65
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-3.8
850 865 880 895 910
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
850 855 880 905 930
Frequency (MHz)
dB
880 ± 30MHz DB0805A0880AWTR
66
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-2.8
-3.2
-3.4
-3.6
-3.8
885 900 915 930 945
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
865 890 915 940 965
Frequency (MHz)
dB
915 ± 30MHz DB0805A0915AWTR
67
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-2.8
-3.2
-3.4
-3.6
-3.8
937 952 967 982 997
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
917 942 967 992 1017
Frequency (MHz)
dB
967± 30MHz DB0805A0967AWTR
68
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-3.8
1300 1350 1400
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1300 1350 1400
Frequency (MHz)
dB
1350 ± 50MHz DB0805A1350AWTR
69
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-2.8
1550 1600 1650 1700 1750
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1550 1600 1650 1700 1750
Frequency (MHz)
dB
1650 ± 50MHz DB0805A1650AWTR
70
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-2.8
1750 1775 1800 1825 1850
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1750 1775 1800 1825 1850
Frequency (MHz)
dB
1800 ± 50MHz DB0805A1800AWTR
71
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-2.8
1800 1825 1850 1875 1900
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1800 1825 1850 1875 1900
Frequency (MHz)
dB
1850 ± 50MHz DB0805A1850AWTR
72
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
1850 1875 1900 1925 1950
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1850 1875 1900 1925 1950
Frequency (MHz)
dB
1900 ± 50MHz DB0805A1900AWTR
73
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-2.8
1900 1925 1950 1975 2000
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
1900 1925 1950 1975 2000
Frequency (MHz)
dB
1950 ± 50MHz DB0805A1950AWTR
74
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.4
-3.6
-3.8
-2.6
-2.8
2040 2090 2140 2190 2240
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
2140 2090 2140 2190 2240
Frequency (MHz)
dB
2140 ± 50MHz DB0805A2140AWTR
75
3
Thin-Film Directional Couplers
DB0805 3dB 90° Couplers
I. Loss 1
I. Loss 2
-3.0
-3.2
-3.3
-3.4
-3.5
-3.1
2275 2300 2325 2350 2375
Frequency (MHz)
dB
R. Loss
Isolation
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
2275 2300 2325 2350 2375
Frequency (MHz)
dB
2325 ± 50MHz DB0805A2325AWTR
