visit us at www.anaren.com usa/canada: toll free: europe: asia: (315) 4328909 (800) 4116596 +44 2392232392 +86 51262749282 model b0205f50 200ahf rev a ultra low profile 1608 balun 50 to 200 balanced description the B0205F50200AHF is a low profile subm iniature balanced to unbalanced transformer designed for differential input locatio ns on data conversion devices (a to d converters). in an easy to use surface mount pack age covering 200 mhz to 500 mhz and superior cmrr performance, this transformer is optimized to offer improved sfdr management during operation of the da ta converter device. the B0205F50200AHF is ideal for high volume manufacturi ng and is higher performance and smaller form factor than traditional wire wound transformers. the B0205F50200AHF has an unbalanced port impedance of 50 and a 200 balanced port impedance. this transformation enables single ended signals to be applied to differential ports on the data converter devices. t he output ports have equal amplitude (3db) with 180 degree phase differential . the B0205F50200AHF is available on tape and reel for pick and place high volume manufacturing. detailed electrical specifications: specifications subject to change without notice. room (25 c) parameter min. typ. max unit frequency 200 500 mhz unbalanced port impedance 50 balanced port impedance 200 return loss 13.9 17.7 db insertion loss* 1.3 1.6 db amplitude balance 0.1 0.4 db phase balance 1.3 3.1 degrees cmrr 38.2 db power handling 2 watts features: ? 125 C700 mhz (il 3db bw) ? 200 C 500 mhz (il 1db bw) ? 0.83 mm height profile ? 50 ohm to 2 x 100 ohm ? excellent cmrr ? input to output dc isolation ? surface mountable ? tape & reel ? nonconductive top surface ? rohs compliant ? halogen free operating temperature 55 +85 oc * insertion loss stated at room temperature (insert ion loss is approximately 0.1 db higher at +85 oc) outline drawing mechanical outline dimensions are in millimeters 2 1 input nc pin designation 3 4 5 open gnd gnd 7 6 balanced port 1 nc pin designation 89 10 gnd gnd balanced port 2 .89 .08 4.10 .10 2.10 .10 4x .955 4x .350 4x .280 10x .300 10x .220 2x .350 orientation marker orientation marker 1 2 3 4 5 8 7 6 10 9 top view (nearside) side view bottom view (farside)
visit us at www.anaren.com usa/canada: toll free: europe: asia: (315) 4328909 (800) 4116596 +44 2392232392 +86 51262749282 model B0205F50200AHF rev. a typical broadband performance: 0 8.0 ghz. return loss input 36 33 30 27 24 21 18 15 12 9 6 3 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency [mhz] [db] insertion loss 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency [mhz] [db] amplitude balance 2 1.5 1 0.5 0 0.5 1 1.5 2 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency [mhz] [db] phase balance 20 15 10 5 0 5 10 15 20 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency [mhz] deg cm rr 50 47 44 41 38 35 32 29 26 23 20 17 14 11 8 5 2 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency [mhz] [db]
visit us at www.anaren.com usa/canada: toll free: europe: asia: (315) 4328909 (800) 4116596 +44 2392232392 +86 51262749282 model b0205f50 200ahf rev a typical performance: 100 mhz. to 600 mhz. return loss input 36 33 30 27 24 21 18 15 12 9 6 3 0 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 frequency [mhz] [db] insertion loss 3.6 3.3 3 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 frequency [mhz] [db] amplitude balance 2 1.5 1 0.5 0 0.5 1 1.5 2 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 frequency [mhz] [db] phase balance 20 15 10 5 0 5 10 15 20 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 frequency [mhz] deg cmrr 50 45 40 35 30 25 20 15 10 5 0 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 frequency [mhz] [db]
visit us at www.anaren.com usa/canada: toll free: europe: asia: (315) 4328909 (800) 4116596 +44 2392232392 +86 51262749282 model B0205F50200AHF rev. a application in adc frontend: modern analogtodigital converter (adc) system oft en uses differential architecture to suppress the e venorder harmonics, minimize noise interference and keep dyn amic range high. the performance of adc system is h eavily influenced by amplitude and phase imbalances arisin g from the adc frontend, especially in high frequen cy applications. anarens multilayer balun b0205f5020 0ahf offers superb amplitude and phase balance perf ormance over wide frequency range, translating to excellent sfdr performance of the adc system. B0205F50200AHF is a ferrite free design eliminating related intermodul ation and other nonlinear effects. B0205F50200AHF has impendence transforming ratio of 1:4 with voltage gain of 6db higher than 1:1 balun, which reduces the input driv e requirement. anarens highly repeatable manufacturing process re sults in little part to part variation, ensuring co nsistent performance in production. a typical adc front end application is shown below. in conjunction with many high speed adc ics, bandw idth of 100mhz to 250mhz can be obtained for 1db ripple of gain flatness. r1 and r2, in shunt with the input impedance of adc, supply the balun with required differential lo ad. the series resistors, r5 and r6 are used to lim it the amount of charge injection from the unbuffered adc back into the analog input. optional rc circuits, r3, r4, c4 and c5 further improve sdfr in many circumstances by supplying an additional current path to neutralize the charge in jection. these values are also chosen to limit or extend the adc a pplication bandwidth. a low frequency solution can be realized by adding additional tuning components c6, l1 and l2. the 1 db ripple of gain flatness is achieved for if band of 50mhz to 1 10mhz. adc frontend schematic for if 100 mhz to 250mhz using B0205F50200AHF adc frontend schematic for if 50mhz to 110mhz using B0205F50200AHF
visit us at www.anaren.com usa/canada: toll free: europe: asia: (315) 4328909 (800) 4116596 +44 2392232392 +86 51262749282 model b0205f50 200ahf rev a mounting configuration: in order for xinger surface mount components to wor k optimally, the proper impedance transmission line s must be used to connect to the rf ports. if this condition is not satisfied, insertion loss, isolation and vs wr may not meet published specifications. all of the xinger components are constructed from o rganic ptfe based composites which possess excellen t electrical and mechanical stability. xinger compone nts are compliant to a variety of rohs and green st andards and ready for pbfree soldering processes. pads are gol d plated with a nickel barrier. to supply common mode voltage offset to the analog todigital converter, dc blocking capacitors are needed at the balanced port (pins 6 & 8). an example of the pcb footprint used in the testing of these parts is shown below. in specific designs , the transmission line widths need to be adjusted to the unique dielectric coefficients and thicknesses as well as varying pick and place equipment tolerances. circuit pattern footprint pad (s) solder resist 1.01 2x 4.02 .29 6x .21 4x .36 10x .29 10x 3x transmission line plated thru hole(s) to ground 1.66 2x .89 4x part orientation (top view) mounting footprint dimensions are in millimeters
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