datasheet for 3A425 by Anaren

datasheet for 3A425 by Anaren
Model 3A425
Rev. D
Xinger Balun
50Ω to 25Ω Balanced
Description
The 3A425 is a low profile balanced to unbalanced transformer designed for pushpull amplifiers in an easy to use surface mount package covering GSM, D-AMPS
and NMT900 applications. These compact Xinger surface mount baluns are ideal
for high volume manufacturing and are more reliable and repeatable than traditional
baluns. The 3A425 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 3A425 is available on tape and reel for pick and place high volume
manufacturing.
ELECTRICAL SPECIFICATIONS***
Features:











800 – 1000 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
Unbalanced
Port
Impedance
Balanced
Port
Impedance*
Return
Loss
Insertion
Loss**
MHz
Ohms
Ohms
dB min
dB max
800 - 1000
50
25
15
0.35
Amplitude
Balance
Phase
Balance
Power
Handling
JC
dB max
Degrees max
Watts
ºC / Watt
ºC
0.4
180+ 5.0
250
5.3
-55 to +85
Operating
Temp.
***Specification based on performance of unit properly installed on microstrip printed circuit
boards with 50  nominal impedance. Specifications subject to change without notice.
**Insertion Loss excludes reflected power. * 25 reference to ground
Outline Drawing
Top View (Near-side)
.750±.010
[19.05±0.25]
Bottom View (Far-side)
Side View
.076±.008
[1.93±0.20]
Pin 2
.031±.004 TYP
[0.80±0.10]
.060±.008
[1.52±0.20]
Pin 2
.027±.004
[0.69±0.10]
.121±.004
[3.07±0.10]
GND
.790±.010
[20.07±0.25]
Pin 1
Denotes
Array Number
.122±.008
[3.10±0.20]
.401±.008
[10.19±0.20]
Pin 3
Pin 3
Dimensions are in Inches [Millimeters]
3A425 Mechanical Outline
Available on Tape
and Reel For Pick and
Place Manufacturing.
.040±.008
[1.02±0.20]
.035±.004 TYP
[0.89±0.10]
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model 3A425
Rev. D
Typical Performance: 600 MHz. to 1200 MHz.
Return Loss 3A425
0
0.75
-5
0.5
-10
R eturn Loss [dB ]
Am plitude Balance [dB]
Amplitude Balance 3A425
1
0.25
0
-0.25
-15
-20
-25
-0.5
-30
-0.75
-35
-1
600
700
800
900
1000
1100
-40
600
1200
700
800
-0.05
-172
-0.1
-174
-0.15
-0.2
-0.25
-0.3
-0.35
1000
1100
1200
-180
-182
-184
-186
-188
900
1200
-178
-0.45
800
1100
-176
-0.4
700
1000
Phase Balance 3A425
-170
Phase Balance [Degrees]
Insertion Loss [dB]
Insertion Loss 3A425
0
-0.5
600
900
Frequency [MHz]
Frequency [MHz]
1000
1100
1200
-190
600
700
800
Frequency [MHz]
900
Frequency [MHz]
Pin Configuration:
Mounting Configuration:
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
Multiple
plated thru holes
to ground
50  Transmission Line
.121 [3.07]
.070
[1.78]
.280 [7.11]
.531 [13.48]
.130 [3.30]
.651
[16.54]
.049
[1.24]
.034 TYP
[0.86]
Dimensions are in Inches [Millimeters]
3A425 Rev A Mounting Footprint
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
2 Places
25 Transmission Line
Referenced to GND
Model 3A425
Rev. D
Packaging Information
Parts are available in a reel. Packaging follows EIA 481-2 for reels. Parts are orientated in tape and reel as shown below.
Minimum order quantity is 500 per reel.
SEE DETAIL "B"
DETAIL "B"
SCALE 1.5:1
SEE DETAIL "A"
DETAIL "A"
SCALE 2=1.5:1
Direction of
Part Feed
(Unloading)
Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
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