visit us at www.anaren.com usa/canada: tollfree: europe: asia: (315)4328909 (800)4116596 +442392232392 +8651262749282 model b d 0 205 f 50 5 0 ahf reva ultralowprofile1608balun 50to50balanced description the BD0205F5050AHF is a low profile subminia ture balanced to unbalanced transformerdesignedfordifferentialinputlocatio nsondataconversiondevicessuch asatodanddtoaconverters.inaneasytouse surfacemountpackagecovering 75mhzto1000mhzandwithcmrrperformancesover 2xthatoftheincumbent wire wound products, this transformer is optimized to offer improved sfdr managementduringoperationofthedataconverterd evice.theBD0205F5050AHF isidealforhighvolumemanufacturingandishighe rperformanceandsmallerform factor than traditional wire wound transformers. th e BD0205F5050AHF has an unbalanced port impedance of 50 and a 50 balanced port impedance. this transformationenablessingleendedsignalstobea ppliedtodifferentialportsonthe data converter devices. the output ports have equal amplitude (3db) with 180 degree phasedifferential. the BD0205F5050AHF is av ailable on tape and reel for pickandplacehighvolumemanufacturing. detailedelectricalspecifications: specificationssubjecttochangewithoutnotice. room(25 c) parameter min. typ. max min. typ. max unit frequency 70 1000 200 500 mhz unbalancedportimpedance 50 50 ohm balancedportimpedance 50 50 ohm returnloss 4 4.6 11 13 db insertionloss* 3.0 3.4 0.9 1.1 db amplitudebalance 0.2 0.6 0.2 0.6 db phasebalance 1 3 1 3 degrees cmrr 36 36 db powerhandling 2 2 watts features: ? 70C1000mhz(il3dbbw) ? 200500mhz(il1dbbw) ? 0.83mmheightprofile ? 50ohmto2x25ohm ? excellentcmrr(36dbtypical) ? inputtooutputdcisolation ? surfacemountable ? tape&reel ? nonconductivetopsurface ? rohscompliant ? halogenfree operatingtemperature 55 +85 55 +85 oc *insertionlossstatedatroomtemperature(insert ionlossisapproximately0.1dbhigherat+85oc) outlinedrawing 4x.96 4x.35 4x.28 10x.30 10x.22 2x.35 orientation marker orientation marker 1 2 3 4 5 8 7 6 10 2 1 unbalanced open pin designation 3 4 5 gnd gnd gnd 7 6 balancedport1 open pin designation 89 10 gnd gnd balancedport2 .84 .08 4.10 .10 2.10 .10 9 topview(nearside) sideview bottomview(farside) mechanicaloutline dimensionsareinmillimeters
visit us at www.anaren.com usa/canada: tollfree: europe: asia: (315)4328909 (800)4116596 +442392232392 +8651262749282 model b d 0 2 0 5 f 50 5 0 ahf rev.a typicalbroadbandperformance:08.0ghz. returnlossinput 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] insertionloss 3.6 3.3 3 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 frequency[mhz] [db] amplitudebalance 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] phasebalance 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: tollfree: europe: asia: (315)4328909 (800)4116596 +442392232392 +8651262749282 model b d 0 205 f 50 5 0 ahf reva typicalperformance:0mhz.to1000mhz. returnlossinput 36 33 30 27 24 21 18 15 12 9 6 3 0 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 frequency[mhz] [db] insertionloss 3.6 3.3 3 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 frequency[mhz] [db] amplitudebalance 2 1.5 1 0.5 0 0.5 1 1.5 2 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 frequency[mhz] [db] phasebalance 20 15 10 5 0 5 10 15 20 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 frequency[mhz] deg cmrr 72 66 60 54 48 42 36 30 24 18 12 6 0 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 frequency[mhz] [db]
visit us at www.anaren.com usa/canada: tollfree: europe: asia: (315)4328909 (800)4116596 +442392232392 +8651262749282 model b d 0 2 0 5 f 50 5 0 ahf rev.a applicationinadcfrontend: modern analogtodigital converter (adc) system oft en uses differential architecture to suppress the e venorder harmonics.theperformanceofadcsystemisheavily influencedbyamplitudeandphaseimbalancesarisi ngfromthe adcfrontend,especially inhighfrequency applicat ions.anarensmultilayerbalunBD0205F5050AHF off erssuperb amplitudeandphasebalanceperformanceoverwidef requencyrange,translatingtoexcellentsfdrperfo rmanceof the adc system. BD0205F5050AHF is a ferrite free de sign eliminating related intermodulation and other nonlinear effects. BD0205F5050AHF provides wideband impedance match, resulting in improvement of gain flatness a t high frequencies,whichinturnreducesinputdriverequ irement.anarenshighlyrepeatablemanufacturingp rocessresults inlittleparttopartvariation,ensuringconsiste ntperformanceinproduction. theschematicofatypicaladcfrontendapplicatio nisshownbelow.inconjunctionwithmanyhighspe edadcics,a bandwidthof70mhzto250mhzcanbeobtainedfor1 dbrippleofgainflatness.differentialloadr1an dr2are33 ohm,slightlyhigherthanthetheoretical25ohm,t oincreasethevoltagegainandreducetherequired inputdrive,while keepingacceptablereturnloss.optionalseriesre sistors,r5,r6,r7andr8areusedtolimittheam ountofcharge injectionfromtheunbufferedadcbackintotheana loginput.optionalrccircuits,r3,r4,c4andc5 furtherimprove sdfrinmanycircumstancesbysupplyinganaddition alcurrentpathtoneutralizethechargeinjection. typical adc frontend schematic using BD0205F5050AHF
visit us at www.anaren.com usa/canada: tollfree: europe: asia: (315)4328909 (800)4116596 +442392232392 +8651262749282 model b d 0 205 f 50 5 0 ahf reva mountingconfiguration: inorderforxingersurfacemountcomponentstowor koptimally,theproperimpedancetransmissionline smustbe usedtoconnecttotherfports.ifthiscondition isnotsatisfied,insertionloss,isolationandvs wrmaynotmeet publishedspecifications. all of the xinger components are constructed from o rganic ptfe based composites which possess excellen t electricalandmechanicalstability.xingercompone ntsarecomplianttoavarietyofrohsandgreenst andardsand readyforpbfreesolderingprocesses.padsaregol dplatedwithanickelbarrier. an example of the pcb footprint used in the testing of these parts is shown below. in specific designs , the transmissionlinewidthsneedtobeadjustedtothe uniquedielectriccoefficientsandthicknessesas wellasvarying pickandplaceequipmenttolerances. mountingfootprint dimensionsareinmillimeters circuitpattern footprintpad(s) solderresist 1.012x 4.02 .296x .214x .3610x .2910x 3x transmission line platedthru hole(s)to ground 1.662x .894x partorientation(topview)
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