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參數資料
| 型號： | 3a325 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Surface Mount Balun |
| 中文描述： | 表面貼裝巴倫 |
| 文件頁數： | 1/3頁 |
| 文件大小： | 246K |
| 代理商： | 3A325 |
3A325
Surface Mount Balun
VER9/22/00
Available on Tape and
Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
(315) 432-8909
(801) 544-2414
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 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 3A325 is available on tape and reel for
pick and place high volume manufacturing.
MECHANICAL OUTLINE:
ELECTRICAL SPECIFICATIONS:
3A325 - Surface Mount Balun
Parameter
Operating Frequency
Unbalanced Port Impedance
Balanced Port Impedance (2
ó
3)
Unbalanced Port Return Loss
Insertion Loss (max)
Output Amplitude Balance (p-p)
Phase Balance
Power Rating (max)
Θ
JC
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
C to +85
C. Unit will operate to +125
C with minor degradation in Insertion Loss
performance. Specifications subject to change without notice.
Specification
450-860 MHz
50
50
(25
to Ground)
-15 dB
0.35 dB
0.5 dB
180 + 5 degrees
275 Watts CW
4.4
o
C/Watt
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