Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe
:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model S25B880N3
Directional Couplers
25 dB
Description
The S25B 880N3 is a lo w prof ile 25dB direct ion al cou pler in an eas y to use
surf ac e m ount package s pecif ic ally desig ned f or th e a ppl icati ons with in t he
410 – 480MHz and 869 - 894MHz frequency bands. The S25B880N3 is
ideal for balanced amplifiers and signal distribution and can be used in
most high power designs. Parts have been subjected to rigorous
qualification testing and units are 100% tested. They are manufactured
using materials with X and Y thermal expansion coefficients compatible
with common substrates such as FR4, G-10 and polyamide.
Features: Electrical Specifications:
Frequency
Band Operating
Frequency Mean
Coupling Insertion
Loss VSWR
MHz dB Min dB Max Max : 1
Low Broad
Low Narrow
High Narrow
410 – 480
450 – 470
869 – 894
30.0 ± 2.0
29.0 ± 2.0
25.0 ± 2.0
0.10
0.10
0.10
1.20
1.20
1.25
Frequency
Band Freq.
Sensitivity Directivity Power Operating
Temp.
dB Max dB Min Ave. CW Watts ºC
Low Broad
Low Narrow
• 410 – 480 MHz
• 869 – 894 MHz
• 350 Watts
• Low loss
• High Directivity
• Surface Mountable
• Tape And Reel
• Convenient Package
• 100% Tested
High Narrow
± 0.75
± 0.30
± 0.30
20.0
20.0
20.0
350
350
350
-55 to +85
-55 to +85
-55 to +85
Specifications subject to change without any not ice.
Outline Drawing:
VER. 4/12/04
Surface Mount Components
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2 414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
Model S25B880N3
Typical Performance:
Co upling S25B 880N3
-31.0
-29.0
-27.0
-25.0
-23.0
-21.0
400 450 500 550 600 650 700 750 800 850 900
Fre que ncy [MHz]
Couplin g [dB]
R et ur n Lo ss S2 5B88 0N 3
-50
-40
-30
-20
-10
0
400 450 500 550 600 650 700 750 800 850 900
Fre
q
uenc
y
[
MHz
]
Return Loss [dB]
Direct ivit y S25B 880N3
-35
-30
-25
-20
-15
-10
-5
0
400 450 500 550 600 650 700 750 800 850 900
Freq ue ncy [MHz]
Directivity [d B]
Tran smission L oss S2 5B 8 80N 3
-0.10
-0.09
-0.08
-0.07
-0.06
-0.05
-0.04
-0.03
400 450 500 550 600 650 700 750 800 850 900
Fre que ncy [MHz]
Tr ansm issio n Los s [d B]
Pin Configuration Mounting Footprint
Pin 1
Pin 3
Pin 2
Pin 4
Pin 1 Pin 2 Pin 3 Pin 4
#1 Input Out -25dB Isolated
#2 Out Input Isolated -25dB
#3 -25dB Isolated Input Out
#4 Isolated -25dB Out Input
.07 8 SQ TYP
[1.98] 2x .918
[23.32]
2x .428
[10.87]
.034 TYP
[.86]
50 ohm Transmission Line
Multiple plated thru holes to ground plate.
Dimensions in inches [mm]
