Model 3W525S
Balun Transformers
50 to 25 Balanced
The 3W525S is a low profile balanced to unbalanced transformer designed for push-
pull amplifiers in an easy to use surface mount package for PCS and DCS
applications. These compact Xinger
®
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
®
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
•
•
•
•
•
•
•
•
•
•
•
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
Θ
JC
ºC / Watt
0.38
0.35
Operating
Temp.
ºC
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
[12.19
±0.25
]
***Specification based on performance of unit properly installed on microstrip printed circuit
boards with 50
Ω
nominal impedance. Specifications subject to change without notice.
**Insertion Loss excludes reflected power. * 25
Ω
reference to ground
Side View
.076
±.008
[1.93
±0.20
]
Pin 2
Bottom View (Far-side)
.027
±.004
[0.69
±0.10
]
.062
±.008
[1.56
±0.20
]
Pin 1
Pin 2
Pin 1
GND
Denotes
Array Number
.650
±.010
[16.51
±0.25
]
.027
±.004
[0.69
±0.10
]
GND
.130
±.008
[3.30
±0.20
]
.121
±.004
[3.07
±0.10
]
.339
±.008
[8.62
±0.20
]
Pin 3
Pin 3
.035
±.004
TYP
[0.89
±0.10
]
.038
±.008
[0.98
±0.20
]
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
ANAREN [ ANAREN MICROWAVE ]
