Model 3A325
Rev. B
Xinger Balun
50Ω to 25Ω Balanced
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.
ELECTRICAL SPECIFICATIONS***
Features:
•
•
•
•
•
•
•
•
•
•
•
470 – 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
Frequency
MHz
Unbalanced
Port
Impedance
Ohms
Balanced
Port
Impedance*
Ohms
Return
Loss
dB min
Insertion
Loss**
dB max
470 - 860
Amplitude
Balance
dB max
50
Phase
Balance
Degrees max
25
Power
Handling
Watts
10
ΘJC
ºC / Watt
0.65
Operating
Temp.
ºC
0.5
180+ 5.0
275
4.4
-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 specification excludes reflected power. *25
Ω
reference to ground
Outline Drawing
Top View (Near-side)
Side View
Botttom View (Far-side)
.750
±.010
[19.05
±0.25
]
.076
±.008
[1.93
±0.20
]
Pin 2
Pin 2
.023
±.004
[0.58
±0.10
]
.064
±.008
[1.63
±0.20
]
Pin 1
Pin 1
GND
.870
±.010
[22.10
±0.25
]
.023
±.004
[0.58
±0.10
]
GND
.129
±.004
[3.28
±0.10
]
.450
±.008
[11.44
±0.20
]
.134
±.008
[3.40
±0.20
]
Denotes
Array Number
Pin 3
Pin 3
.044
±.008
[1.12
±0.20
]
.027
±.004
TYP
[0.69
±0.10
]
Dimensions are in Inches [Millimeters]
3A325 Rev A 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 ]
