3W525S

Model 3W525S Rev. A Balun Transformers 50 to 25 Balanced Description The 3W525S is a low profile balanced to unbalanced transformer designed for pushpull 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*** 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 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 ΘJC dB max Degrees max Watts ºC / Watt ºC 0.40 0.40 180± 5.0 180± 5.0 150 150 11.3 11.3 -55 to +85 -55 to +85 Operating Temp. ***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 Outline Drawing Top View (Near-side) .480±.010 [12.19±0.25] Side View Pin 2 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 .650±.010 [16.51±0.25] .121±.004 [3.07±0.10] .339±.008 [8.62±0.20] GND Denotes Array Number .027±.004 [0.69±0.10] GND .130±.008 Pin 3 [3.30±0.20] Pin 3 .035±.004 TYP [0.89±0.10] .038±.008 [0.98±0.20] Dimensions are in Inches [Millimeters] 3W525S Mechanical Outline 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 3W525S Rev. A Typical Performance: 1700 MHz. to 2600 MHz. Return Loss 3W525S Amplitude Balance 3W525S 0 0.5 0.4 -5 -10 0.2 Return Loss [dB] Amplitude Balance [dB] 0.3 0.1 0 -0.1 -0.2 -20 -25 -30 -0.3 -35 -0.4 -0.5 1700 -15 1800 1900 2000 2100 2200 2300 2400 2500 -40 1700 2600 1800 1900 2000 Frequency [MHz] -170 -0.05 -172 -0.1 -174 Phase Balance [Degrees] Insertion Loss [dB] 2200 2300 2400 2500 2600 2400 2500 2600 Phase Balance 3W525S Insertion Loss 3W525S 0 -0.15 -0.2 -0.25 -0.3 -0.35 -0.4 -0.45 -0.5 1700 2100 Frequency [MHz] -176 -178 -180 -182 -184 -186 -188 1800 1900 2000 2100 2200 2300 2400 2500 2600 -190 1700 1800 1900 Frequency [MHz] 2000 2100 2200 2300 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 50 Transmission Line .121 [3.07] Multiple plated thru holes to ground .070 [1.78] .210 [5.32] .390 [9.91] .130 [3.30] .380 [9.65] .049 [1.24] .034 TYP [0.86] Dimensions are in Inches [Millimeters] 3W525S 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