Model 3W512
Rev. B
Balun
50Ω to 12.5Ω Balanced
Description
The 3W512 is a low profile balanced to unbalanced transformer designed for push-
pull amplifiers in an easy to use surface mount package for PCS, DCS, and UMTS.
These compact Xinger surface mount baluns are ideal for high volume
manufacturing and are more reliable and repeatable than traditional baluns. The
3W512 has an unbalanced port impedance of 50Ω and balanced port impedances of
12.5Ω to ground with a 25Ω 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 3W512 is
available on tape and reel for pick and place high volume manufacturing.
ELECTRICAL SPECIFICATIONS***
Unbalanced
Port
Balanced
Port
Features:
Return
Loss
Insertion
Loss**
Frequency
• 1.8 – 2.2 GHz
Impedance
Ohms
Impedance*
Ohms
• 180° Transformer
• 50 Ohm to 12.5+j5.5 Ohm
• Broad Band
• Low Insertion Loss
• High Power
• Even Order Suppression
• Input to Output DC Isolation
• Surface Mountable
• Tape & Reel
GHz
dB Min
dB max
1.8 – 2.2
50
12.5+j5.5
15
0.40
Amplitude
Balance
Phase
Balance
Power
Handling
Operating
Temp.
ΘJC
dB max
Degrees max
Watts
ºC / Watt
ºC
0.40
180+ 5.0
150
11.3
-55 to +85
•
Convenient Package
**Specification based on performance of unit properly installed on microstrip printed circuit
boards with 50 Ω nominal impedance. Specifications subject to change without notice.
* 50Ω reference to ground
Outline Drawing
Top View (Near-side)
Side View
Bottom View (Far-side)
.290
±.004
±0.10
[7.37
]
±.008
±0.20
.075
[1.91
±.004
±0.10
.100
[2.54
]
]
±.008
±0.20
.035
[0.89
]
±.010
.750
±0.25
[19.05
]
Pin 2
GND
Pin 3
Pin 3
Pin 2
.030
[0.76
.050
±.004
TYP
±0.10
]
±.008
.050
[1.27
±.010
.550
[13.97
±0.20
]
±.008
±0.25
]
±.004
.030
±0.20
[1.27
]
±0.10
[0.76
]
±.008
.232
±0.20
[5.91
]
Pin 1
Denotes
Array Number
GND
Pin 1
±.004
.112
±0.10
[2.86
]
s]
Dimensions are in Inches [Millimeter
ical Outline
3W512 Rev A Mechan
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape
and Reel For Pick and
Place Manufacturing.
