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Model 3W525S
Balun Transformers 50 to 25 Balanced
The 3W525S is a low profile balanced to unbalanced transformer designed for pushpull amplifiers in an easy to use surface mount package for PCS and DCS applications. These compact Xinger(R) surface mount baluns are ideal for high volume manufacturing and are more reliable and repeatable than traditional baluns. The 3W525S has an unbalanced port impedance of 50 and balanced port impedances of 25 to ground with a 50 balance between outputs. This eases the matching of the push-pull amplifier's power transistors, which have low impedance levels. The output ports have equal amplitude (-3dB) with 180 degree phase differential. The Xinger(R) balun is a result of years of research and development culminating with a solution so unique, a patent is pending on the design approach. The 3W525S is available on tape and reel for pick and place high volume manufacturing.
Rev. A
Description
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* * * * * * * * * * *
Features:
ELECTRICAL SPECIFICATIONS***
Frequency
GHz
1.8 - 2.5 GHz 180 Transformer 50 Ohm to 2 x 25 Ohm Low Insertion Loss High Power Even Order Suppression Input to Output DC Isolation Surface Mountable Tape & Reel Convenient Package Lead Free
Unbalanced Port Impedance
Ohms
Balanced Port Impedance*
Ohms
Return Loss
dB min
Insertion Loss**
dB max
1.8 - 2.5 1.805-2.170 Amplitude Balance
dB max
50 50 Phase Balance
Degrees max
25 25 Power Handling
Watts
15 15 JC
C / Watt
0.38 0.35 Operating Temp.
C
0.40 0.40
180 5.0 180 5.0
150 150
11.3 11.3
-55 to +85 -55 to +85
Outline Drawing
Top View (Near-side) .480.010 [12.190.25]
***Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 nominal impedance. Specifications subject to change without notice. **Insertion Loss excludes reflected power. * 25 reference to ground
Side View .076.008 [1.930.20] Pin 2
Bottom View (Far-side) .027.004 [0.690.10] .062.008 [1.560.20] Pin 1
Pin 2
Pin 1 GND Denotes Array Number
.650.010 [16.510.25]
.027.004 [0.690.10] GND .130.008 [3.300.20]
.121.004 [3.070.10] .339.008 [8.620.20]
Pin 3
Pin 3
.035.004 TYP [0.890.10] .038.008 [0.980.20]
Dimensions are in Inches [Millimeters] 3W525S Mechanical Outline
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 3W525S
Rev. A
Typical Performance: 1700 MHz. to 2600 MHz.
Amplitude Balance 3W525S
0.5 0.4 0.3
Return Loss 3W525S
0 -5 -10
Amplitude Balance [dB]
Return Loss [dB]
1800 1900 2000 2100 2200 2300 2400 2500 2600
0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1700
-15 -20 -25 -30 -35 -40 1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
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0 -0.05 -0.1
Frequency [MHz]
Frequency [MHz]
Insertion Loss 3W525S
-170 -172 -174
Phase Balance 3W525S
Insertion Loss [dB]
-0.15 -0.2 -0.25 -0.3 -0.35 -0.4 -0.45 -0.5 1700
Phase Balance [Degrees]
1800 1900 2000 2100 2200 2300 2400 2500 2600
-176 -178 -180 -182 -184 -186 -188 -190 1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
Frequency [MHz]
Frequency [MHz]
Pin Configuration
Mounting Configuration
To ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part
50 Multiple plated thru holes to ground
Transmission Line
.121 [3.07] .070 [1.78]
.210 [5.32] .390 [9.91] .130 [3.30]
.380 [9.65] .049 [1.24] .034 TYP [0.86] 2 Places 25 Transmission Line Referenced to GND
Dimensions are in Inches [Millimeters] 3W525S Mounting Footprint
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 544-2414 +44 2392-232392
Available on Tape and Reel For Pick and Place Manufacturing.

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