3A425 Datasheet, PDF (1/2 Pages) Anaren Microwave – Xinger Balun 50Ω to 25Ω Balanced

Model 3A425
Rev. C
Xinger Balun
50Ω to 25Ω Balanced
Features:
• 800 – 1000 MHz
• 180° Transformer
• 50 Ohm to 25 Ohm
• Broad Band
• Low Insertion Loss
• High Power
• Even Order Harmonic
Suppression
• Input to Output DC Isolation
• Surface Mountable
• Tape & Reel
• Convenient Package
Outline Drawing
Description
The 3A425 is a low profile balanced to unbalanced transformer designed for push-
pull amplifiers in an easy to use surface mount package covering GSM, D-AMPS
and NMT900 applications. These compact Xinger® surface mount baluns are ideal
for high volume manufacturing and are more reliable and repeatable than traditional
baluns. The 3A425 has an unbalanced port impedance of 50Ω and balanced port
impedances of 25Ω to ground with a 50Ω 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 3A425 is available on tape and reel for pick and place high volume
manufacturing.
ELECTRICAL SPECIFICATIONS***
Unbalanced Balanced
Frequency
Port
Port
Impedance Impedance*
MHz
Ohms
Ohms
800 - 1000
50
25
Return
Loss
dB min
15
Insertion
Loss**
dB max
0.35
Amplitude
Balance
Phase
Balance
Power
Handling
ΘJC
Operating
Temp.
dB max
Degrees max
Watts
ºC / Watt
ºC
0.4
180+ 5.0
250
5.3
-55 to +85
***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. * 25Ω reference to ground
Top View (Near-side)
Side View
Bottom View (Far-side)
GND
Pin 1
.750±.010
[19.05±0.25]
.076±.008
[1.93±0.20]
Pin 2
.790±.010
[20.07±0.25]
Pin 2
.027±.004
[0.69±0.10]
.122±.008
[3.10±0.20]
.031±.004 TYP
[0.80±0.10]
.060±.008
[1.52±0.20]
.121±.004
[3.07±0.10]
.401±.008
[10.19±0.20]
Denotes
Array Number
Pin 3
Dimensions are in Inches [Millimeters]
3A425 Mechanical Outline
Pin 3
.040±.008
[1.02±0.20]
.035±.004 TYP
[0.89±0.10]
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
[phone]
[phone]
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