Model 3A625 Rev B
Balun Transformers 50Ω to 25Ω Balanced
Description The 3A625 is a low profile balanced to unbalanced transformer designed for push- pull amplifiers in an easy to use surface mount package for W-LAN and MMDS applications. These compact Xinger surface mount baluns are ideal for high volume manufacturing and are more reliable and repeatable than traditional baluns. The 3A625 has an unbalanced port impedance of 50Ω and balanced port impedances of 25Ω to ground with a 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 (-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 3A625 is available on tape and reel for pick and place high volume manufacturing.
ELECTRICAL SPECIFICATIONS*** Unbalanced Balanced Features: Return Insertion Frequency Port Port 2.3 – 2.7 GHz Loss Loss** 180 Transformer Impedance Impedance*
50 Ohm to 2 x 25 Ohm GHz Ohms Ohms dB min dB max Low Insertion Loss 2.3 – 2.7 50 25 15 0.35 High Power Even Order Suppression Amplitude Phase Power JC Operating Input to Output DC Isolation Balance Balance Handling Temp. Surface Mountable dB max Degrees max Watts ºC / Watt ºC Tape & Reel
Convenient Package 0.40 180 5.0 150 15.8 -55 to +85 ***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) Side View Bottom View (Far-side)
.027±.004 [0.69±0.10] .076±.008 ±.010 ±.008 .480 [1.93±0.20] .062 [12.19±0.25] [1.56±0.20] Pin 2 Pin 2 Pin 1
.027±.004 .121±.004 [3.07±0.10] Pin 1 .650±.010 [0.69±0.10] [16.51±0.25] GND .339±.008 [8.62±0.20] GND .130±.008 [3.30±0.20]
Denotes Pin 3 .035±.004 TYP Pin 3 Array Number [0.89±0.10] .038±.008 [0.98±0.20] Dimensions are in Inches [Millimeters] 3A625 Rev A Mechanical Outline
Available on Tape USA/Canada: (315) 432-8909 and Reel For Pick and Toll Free: (800) 544-2414 Place Manufacturing. Europe: +44 2392-232392
Model 3A625 Rev B
Typical Performance: 2000 MHz. to 3000 MHz. Return Loss 3A625 Amplitude Balance 3A625 0.5 0 Unbalanced Port 0.4 Balanced Port -5 0.3
0.2 -10 0.1
0 -15
-0.1 Return Loss [dB] Loss Return -20 Amplitude Balance[dB] -0.2
-0.3 -25 -0.4
-0.5 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 -30 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 Frequency[MHz] Frequency[MHz] Insertion Loss 3A625 Phase Balance 3A625 0 -170
-0.05 -172
-0.1 -174
-0.15 -176
-0.2 -178
-0.25 -180
-0.3 -182 Insertion Loss[dB] Phase Balance[deg] -0.35 -184
-0.4 -186
-0.45 -188
-0.5 -190 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 Frequency[MHz] 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 .121 [3.07] plated thru holes to ground .070 [1.78]
.210 [5.32] .380 .390 [9.91] [9.65] .130 [3.30]
.049 [1.24] .034 TYP 2 Places [0.86] 25 Transmission Line Referenced to GND Dimensions are in Inches [Millimeters] 3A625 Rev A Mounting Footprint
USA/Canada: (315) 432-8909 Available on Tape and Toll Free: (800) 544-2414 Reel For Pick and Place Manufacturing. Europe: +44 2392-232392