3A512 Datasheet, PDF (1/2 Pages) Anaren Microwave – Balun 50Ω to 12.5Ω Balanced

Model 3A512
Rev. A
Balun
50Ω to 12.5Ω Balanced
Description
The 3A512 is a low profile balanced to unbalanced transformer designed for push-
pull amplifiers in an easy to use surface mount package for Japanese PDC push-
pull amplifier and mixer applications. These compact Xinger surface mount baluns
are ideal for high volume manufacturing and are more reliable and repeatable than
traditional baluns. The 3A512 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 3A512 is available on tape and reel for pick and place high
volume manufacturing.
Features:
• 1.4 – 1.6 GHz
• 180° Transformer
• 50 Ohm to 2 x 12.5 + j3.5 Ohm
• Low Insertion Loss
• High Power
• Even Order Suppression
• Input to Output DC Isolation
• Surface Mountable
• Tape & Reel
• Convenient Package
Outline Drawing
ELECTRICAL SPECIFICATIONS***
Unbalanced Balanced
Frequency
Port
Port
Impedance Impedance*
GHz
Ohms
Ohms
1.4 – 1.6
50
12.5+j3.5
Return
Loss
dB Min
15
Insertion
Loss**
dB max
0.30
Amplitude
Balance
Phase
Balance
Power
Handling
ΘJC
Operating
Temp.
dB max
Degrees max
Watts
ºC / Watt
ºC
0.40
180+ 5.0
250
5.8
-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 reflection loss. * 50Ω reference to ground
Top View (Near-side)
Side View
Bottom View (Far-side)
Pin 2
.750±.010
[19.05±0.25]
.075±.008
[1.91±0.20]
Pin 3
GND
.550±.010
[13.97±0.25]
.100±.004 [2.54±0.10]
Pin 3
.050±.008
[1.27±0.20]
.030±.004
[0.76±0.10]
.290±.004 [7.37±0.10]
.035±.008 [0.89±0.20]
Pin 2
.030±.004 TYP
[0.76±0.10]
.050±.008
[1.27±0.20]
Pin 1
Denotes
Array Number
GND Pin 1
.112±.004 [2.86±0.10]
.232±.008 [5.91±0.20]
Dimensions are in Inches [Millimeters]
3A512 Rev A Mechanical Outline
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada: [phone]
Toll Free:
[phone]
Europe:
[phone]