3W525

Model 3W525 Rev. B Balun Transformers 50 to 25 Balanced The 3W525 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 3W525 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 3W525 is available on tape and reel for pick and place high volume manufacturing. Description • • • • • • • • • • Features: ELECTRICAL SPECIFICATIONS*** Frequency GHz 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 Unbalanced Port Impedance Ohms Balanced Port Impedance* Ohms Return Loss dB min Insertion Loss** dB max 1.8 – 2.5 1.805-2.170 Amplitude Balance dB max 50 50 Phase Balance Degrees max 25 25 Power Handling Watts 15 15 ΘJC ºC / Watt 0.38 0.35 Operating Temp. ºC 0.40 0.40 180± 5.0 180± 5.0 150 150 11.3 11.3 -55 to +85 -55 to +85 Outline Drawing Top View (Near-side) .480±.010 [12.19±0.25] ***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 Side View .076±.008 [1.93±0.20] Pin 2 Bottom View (Far-side) .027±.004 [0.69±0.10] .062±.008 [1.56±0.20] Pin 1 Pin 2 Pin 1 GND Denotes Array Number .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] Pin 3 Pin 3 .035±.004 TYP [0.89±0.10] .038±.008 [0.98±0.20] Dimensions are in Inches [Millimeters] 3W525 Rev A 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 3W525 Rev. B Typical Performance: 1700 MHz. to 2600 MHz. Amplitude Balance 3W525 0.5 0.4 0.3 Return Loss 3W525 0 -5 -10 Amplitude Balance [dB] Return Loss [dB] 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1700 -15 -20 -25 -30 -35 -40 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 1800 1900 2000 2100 2200 2300 2400 2500 2600 Frequency [MHz] Frequency [MHz] Phase Balance 3W525 -170 -172 Insertion Loss 3W525 0 -0.05 Insertion Loss [dB] -0.15 -0.2 -0.25 -0.3 -0.35 -0.4 -0.45 -0.5 1700 Phase Balance [Degrees] 1800 1900 2000 2100 2200 2300 2400 2500 2600 -0.1 -174 -176 -178 -180 -182 -184 -186 -188 -190 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 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 50 Multiple plated thru holes to ground Transmission Line .121 [3.07] .070 [1.78] .210 [5.32] .390 [9.91] .130 [3.30] .380 [9.65] .049 [1.24] .034 TYP [0.86] 2 Places 25 Transmission Line Referenced to GND Dimensions are in Inches [Millimeters] 3W525 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.