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 3A512 rev. a balun 50 ? to 12.5 ? balanced description the 3A512 is a low profile balanced to unbalanced transformer designed for push- pull amplifiers in an easy to use surface mount package for japanese pdc push- pull amplifier and mixer applications. these compact xinger ? surface mount baluns are ideal for high volume manufacturing and are more reliable and repeatable than traditional baluns. the 3A512 has an unbalanced port impedance of 50 ? and balanced port impedances of 12.5 ? to ground with a 25 ? 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 3A512 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 1.4 ? 1.6 50 12.5+j3.5 15 0.30 amplitude balance phase balance power handling jc operating temp. db max degrees max watts oc / watt oc features: ? 1.4 ? 1.6 ghz ? 180 transformer ? 50 ohm to 2 x 12.5 + j3.5 ohm ? low insertion loss ? high power ? even order suppression ? input to output dc isolation ? surface mountable ? tape & reel ? convenient package 0.40 180+ 5.0 250 5.8 -55 to +85 ***specification based on performanc e of unit properly installed on microstrip printed circuit boards with 50 ? nominal impedance. specifications subject to change without notice. **insertion loss specification ex cludes reflection loss. * 50 ? reference to ground outline drawing 3 a 5 1 2 r e v a m e c h a n i c a l o u t l i n e d i m e n s i o n s a r e i n i n c h e s [ m i l l i m e t e r s ] side view .075 .008 [1.91 0.20 ] .750 .010 [19.05 0.25 ] .550 .010 [13.97 0.25 ] pin 2 pin 3 pin 1 top view (near-side) bottom view (far-side) denotes array number gnd pin 2 pin 3 pin 1 .232 .008 [5.91 0.20 ] .112 .004 [2.86 0.10 ] .030 .004 typ [0.76 0.10 ] .100 .004 [2.54 0.10 ] .050 .008 [1.27 0.20 ] .030 .004 [0.76 0.10 ] .035 .008 [0.89 0.20 ] .290 .004 [7.37 0.10 ] .050 .008 [1.27 0.20 ] gnd
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 3A512 rev. a typical performance: 1200 mhz. to 1800 mhz. amplitude balance 3A512 -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 1200 1300 1400 1500 1600 1700 1800 frequency [mhz] amplitude balance [db] return loss 3A512 -50 -40 -30 -20 -10 0 1200 1300 1400 1500 1600 1700 1800 frequency [mhz] return loss [db] insertion loss 3A512 -0.5 -0.4 -0.3 -0.2 -0.1 0 1200 1300 1400 1500 1600 1700 1800 frequency [mhz] insertion loss [db] phase balance 3A512 -190 -185 -180 -175 -170 1200 1300 1400 1500 1600 1700 1800 frequency [mhz] phase balance [degrees] pin configuration: mounting configuration: dimensions are in inches [millimeters] 3A512 rev a mounting footprint 50 transmission line .221 [5.62] .030 typ [0.76] .070 [1.78] .115 [2.92] .450 [11.43] .030 [0.76] .075 [1.90] .075 [1.90] .080 [2.03] 2 places 12.5 transmission line referenced to gnd .340 [8.64] .050 [1.27] multiple plated thru holes to ground to ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part .034 [0.86]
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