SAW Components Data Sheet B3767

SAW Components B3767 Low-loss Filter 447,725 MHz Data Sheet Ceramic package QCC8B Features n RF low-loss filter for remote control receivers n Package for Surface Mounted Technology (SMT) n Balanced and unbalanced operation possible n Protection layer: Elpas n AEC-Q200 qualified component family Terminals n Ni, gold plated typ. dimensions in mm, approx. weight 0,07 g Pin configuration1) 1 Input Ground (recommended) or Input 2 Input (recommended) or Input Ground 5 Output (recommended) or Output Ground 6 Output Ground (recommended) or Output 4,8 Case - Ground 3,7 to be grounded Type Ordering code Marking and package Packing according to according to B3767 B39451-B3767-Z810 C61157-A7-A46 F61074-V8167-Z000 ElectrostacticSensitiveDevice (ESD) Maximum ratings Operable temperature range T –45/+120 ˚C A Storage temperature range T –45/+120 ˚C stg DC voltage V 6 V DC Source power P 10 dBm source impedance 50 W S 1)The recommended pin configuration usually offers best suppression of electrical crosstalk.The filter characteristics refer to this configuration. 2 Nov 24, 2004

SAW Components B3767 Low-loss Filter 447,725 MHz Data Sheet Characteristics Reference temperature: T = –40 ... +95˚C A Terminating source impedance: Z = 50W and matching network S Terminating load impedance: Z = 50W and matching network L min. typ. max. Center frequency fC — 447,725 — MHz (center frequency between 3 dB points) Minimum insertion attenuation a min including loss in matching elements — 1,9 2,7 dB excluding loss in matching elements — 1,4 2,2 dB Pass band(relative toa ) min 447,60 ... 447,85 MHz — 0,5 2,0 dB 447,58 ... 447,87 MHz — 0,7 3,0 dB 447,56 ... 447,91 MHz — 1,0 6,0 dB Filter bandwidth a £ 3 dB 0,61 0,67 0,73 MHz rel Relative attenuation(relative toa ) a min rel 10,00 ... 427,80 MHz 51 55 — dB 427,80 ... 437,30 MHz 47 51 — dB 437,30 ... 445,52 MHz 29 34 — dB 445,52 ... 445,92 MHz 22 27 — dB 445,92 ... 446,90 MHz 17 21 — dB 448,72 ... 455,80 MHz 18 21 — dB 455,80 ... 500,00 MHz 39 44 — dB 500,00 ... 720,00 MHz 50 55 — dB 720,00 ... 830,00 MHz 45 50 — dB 830,00 ...1000,00 MHz 60 65 — dB 1000,00 ...2500,00 MHz 45 50 — dB Impedancefor pass band matching1) Input: Z =R ||C — 240 ||2,2 — W || pF IN IN IN Output:ZOUT =ROUT ||COUT — 240 ||2,2 — W || pF 1)Impedance for passband matching bases on an ideal, perfect matching of the SAW filter to source-andtoloadimpedance(here50Ohm). AftertheSAWfilterisremovedandinput imped- ance into the input matching / output matching network is calculated. Theconjugatecomplex valueofthesecharacteristicimpedancesaretheinputandoutput imped- ances for flat passband. For more details, we refer to EPCOS application note #4. 3 Nov 24, 2004

SAW Components B3767 Low-loss Filter 447,725 MHz Data Sheet Matching network to 50W (element values depend on pcb layout and equivalent circuit) C = 1,5 pF p1 L = 33 nH s2 L = 33 nH s3 C = 1,5 pF p4 Minimising the crosstalk Foragoodultimaterejectionalowcrosstalkisnecessary.Lowcrosstalkcanberealisedwith a good RF layout. The major crosstalk mechanism is caused by the “ground-loop” problem. Groundingloopsarecreatedifinput-andoutputtransducerGNDareconnectedonthetop-side ofthePCBandfedtothesystemgroundingplanebyacommonviahole.Toavoidthecommon groundpath,thegroundpinoftheinput-andoutputtransducerarefedtothesystemground plane (bottom PCB plane) by their own via hole. The transducers’ grounding pins should be isolated from the upper grounding plane. A common GND inductivity of 0.5nH degrades the ultimate rejection (crosstalk) by 20dB. TheoptimisedPCBlayout,includingmatchingnetworkfortransformationto50Ohm,isshown here.InthisPCBlayoutthegroundingloopsareminimisedtorealise goodultimaterejection. Optimised PCB layout for SAW filters in QCC8B package, pinning 2,5 (top side, scale 1:1) Thebottomsideisacopperplane(systemgroundarea).Theinputandoutputgroundingpins are isolated and connected to the common ground by separated via holes. For good contact of the upper grounding area with the lower side it is necessary to place enough via holes. 4 Nov 24, 2004

SAW Components B3767 Low-loss Filter 447,725 MHz Data Sheet Frequency response Frequency response(wideband) 5 Nov 24, 2004

SAW Components B3767 Low-loss Filter 447,725 MHz Data Sheet Frequency response(ultimate rejection) Published by EPCOS AG Surface Acoustic Wave Components Division, SAW CE AE PD P.O. Box 80 17 09, D-81617 München ª EPCOSAG2004.AllRightsReserved.Reproduction,publicationanddisseminationofthisbro- chure and the information contained therein without EPCOS’ prior express consent is prohibited. Theinformationcontainedinthisbrochuredescribesthetypeofcomponentandshallnotbecon- sidered as guaranteed characteristics. Purchase orders are subject to the General Conditions for theSupplyofProductsandServicesoftheElectricalandElectronicsIndustryrecommendedbythe ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed. This brochure replaces the previous edition. Forquestionsontechnology,pricesanddeliverypleasecontacttheSalesOfficesofEPCOSAGor the international Representatives. Duetotechnicalrequirementscomponentsmaycontaindangeroussubstances.Forinformationon the type in question please also contact one of our Sales Offices. 6 Nov 24, 2004

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