3A325 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – Surface Mount Balun

3A325
Surface Mount Balun
VER9/22/00
3A325
Features:
• 450 – 860 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
Description:
The 3A325 is a low profile balanced to unbalanced transformer
designed for push-pull amplifiers in an easy to use surface
mount package for NMT450 and TV broadcast applications.
These compact Xinger® surface mount baluns are ideal for high
volume manufacturing and are more reliable and repeatable
than traditional baluns. The 3A325 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 3A325 is available on tape and reel for
pick and place high volume manufacturing.
MECHANICAL OUTLINE:
ELECTRICAL SPECIFICATIONS:
3A325 - Surface Mount Balun
Parameter
Specification
Operating Frequency
450-860 MHz
Unbalanced Port Impedance
Balanced Port Impedance (2ó3)
50Ω
50Ω (25Ω to Ground)
Unbalanced Port Return Loss
-15 dB
Insertion Loss (max)
0.35 dB
Output Amplitude Balance (p-p)
0.5 dB
Phase Balance
180 + 5 degrees
Power Rating (max)
ΘJC
275 Watts CW
4.4 ^oC/Watt
Specifications based on performance of units installed in an RF microstrip test fixture. 50 ohms nominal input impedance, and 25 ohm nominal
output impedance. Temperature of operation, -55^oC to +85^oC. Unit will operate to +125^oC with minor degradation in Insertion Loss
performance. Specifications subject to change without notice.
Page 1 of 3
Available on Tape and
Reel For Pick and
Place Manufacturing.
USA/Canada:
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