Available on Tape
and Reel For Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Model 3W525
S
Rev. A
Balun Transformers
50 to 25 Balanced
Description
The 3W525S is a low profile balanced to unbalanced transformer designed for push-
pull amplifiers in an easy to use surface mount package for PCS and DCS
applications. These compact Xinger
surface mount baluns are ideal for high
volume manufacturing and are more reliable and repeatable than traditional baluns.
The 3W525S 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 3W525S is available on tape and reel for pick and place high volume
manufacturing.
ELECTRICAL SPECIFICATIONS***
Frequency
Unbalanced
Port
Impedance
Balanced
Port
Impedance*
Return
Loss
Insertion
Loss**
GHz Ohms Ohms dB min dB max
1.8 – 2.5 50 25 15 0.38
1.805-2.170 50 25 15 0.35
Amplitude
Balance
Phase
Balance
Power
Handling
Θ
ΘΘ
ΘJC
Operating
Temp.
dB max Degrees max Watts ºC / Watt ºC
0.40 180± 5.0 150 11.3 -55 to +85
Features:
• 1.8 – 2.5 GHz
• 180°
°°
° Transformer
• 50 Ohm to 2 x 25 Ohm
• Low Insertion Loss
• High Power
• Even Order Suppression
• Input to Output DC Isolation
• Surface Mountable
• Tape & Reel
• Convenient Package
• Lead Free 0.40 180± 5.0 150 11.3 -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. * 25
Ω
reference to ground
Outline Drawing
3W525S Mechanical Outline
Dimensions are in Inches [Millimeters]
.076
±.008
[1.93
±0.20
]
Side View
.480
±.010
[12.19
±0.25
]
.650
±.010
[16.51
±0.25
]
Pin 2
Pin 3
Pin 1
GND
Denotes
Array Number
Top View (Near-side)
.038
±.008
[0.98
±0.20
]
.035
±.004
TYP
[0.89
±0.10
]
GND
.130
±.008
[3.30
±0.20
]
Pin 3
.027
±.004
[0.69
±0.10
]
Pin 2
.339
±.008
[8.62
±0.20
]
.121
±.004
[3.07
±0.10
]
.062
±.008
[1.56
±0.20
]
.027
±.004
[0.69
±0.10
]
Bottom View (Far-side)
Pin 1
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 544-2414
+44 2392-232392
Available on Tape and
Reel For Pick and Place
Manufacturing.
Model 3W525
S
Rev. A
Typical Performance: 1700 MHz. to 2600 MHz.
Pin Configuration Mounting Configuration
Dimensions are in Inches [Millimeters]
3W525S Mounting Footprint
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
.121 [3.07]
.070
[1.78]
.380
[9.65]
.049
[1.24]
.130 [3.30]
.390 [9.91]
.210 [5.32]
Multiple
plated thru holes
to ground
.034 TYP
[0.86] 2 Places
25 Transmission Line
Referenced to GND
50 Transmission Line
Amplitude Balance 3W525S
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
1700 1800 1900 2000 2100 2200 2300 2400 2500 2600
Frequency [MHz]
Amplitude Balance [dB]
Return Loss 3W525S
-40
-35
-30
-25
-20
-15
-10
-5
0
1700 1800 1900 2000 2100 2200 2300 2400 2500 2600
Frequency [MHz]
Return Loss [dB]
Insertion Loss 3W525S
-0.5
-0.45
-0.4
-0.35
-0.3
-0.25
-0.2
-0.15
-0.1
-0.05
0
1700 1800 1900 2000 2100 2200 2300 2400 2500 2600
Frequency [MHz]
Insertion Loss [dB]
Phase Balance 3W525S
-190
-188
-186
-184
-182
-180
-178
-176
-174
-172
-170
1700 1800 1900 2000 2100 2200 2300 2400 2500 2600
Frequency [MHz]
Phase Balance [Degrees]
