3A525 Datasheet, PDF (1/2 Pages) Anaren Microwave – Balun Transformers 50Ω to 25Ω Balanced

Model 3A525
Rev. A
Balun Transformers
50Ω to 25Ω Balanced
Description
The 3A525 is a low profile balanced to unbalanced transformer in an easy
to use surface mount package covering Japanese PDC, DCS and PCS
receive push-pull amplifier and mixer applications. The 3A525 has an
unbalanced impedance of 50Ω and a balanced port impedances of 25Ω to
ground with 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 (-3 dB) with 180° phase differential.
The 3A525 is available on tape and reel for pick and place high volume
manufacturing.
Features:
• 1.5 – 1.9 GHz
• 180° Transformer
• 50 Ohm to 2 x 25 Ohm
• Low Insertion Loss
• High Power
• 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
1.5 – 1.9
50
25
Return
Loss
dB min
15
Insertion
Loss**
dB max
0.35
Amplitude
Balance
Phase
Balance
Power
Handling
ΘJC
Operating
Temp.
dB max
Degrees max
Watts
ºC / Watt
ºC
0.40
180± 5.0
150
7.2
-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 excludes reflected power. * 25Ω reference to ground
Top View (Near-side)
.480±.010
[12.19±0.25]
Pin 2
Side View
Bottom View (Far-side)
.076±.008
[1.93±0.20]
Pin 2
.027±.004 [0.69±0.10]
.062±.008
[1.56±0.20]
Pin 1
Pin 1
GND
.650±.010
[16.51±0.25]
.027±.004
[0.69±0.10]
GND
.130±.008 [3.30±0.20]
.121±.004 [3.07±0.10]
.339±.008 [8.62±0.20]
Denotes
Array Number
Pin 3
Dimensions are in Inches [Millimeters]
3A525 Rev A Mechanical Outline
Pin 3
.035±.004 TYP
[0.89±0.10]
.038±.008 [0.98±0.20]
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
[phone]
[phone]
[phone]