filters for industrial applications series/type: b4812 the following products presented in this data sheet are being withdrawn. ordering code substitute product date of withdrawal deadline last orders last shipments b39251b4812z710 2007-09-21 2007-12-31 2008-03-31 for further information please contact your nearest epcos sales office, which will also support you in selecting a suitable substitute. the addresses of our worldwide sales network are presented at www.epcos.com/sales.
2 jul 11, 2003 saw components b4812 246,01 mhz low-loss filter data sheet ceramic package qcc10b features l low-loss if filter for mobile telephone l channel selection in gsm systems l hermetically sealed ceramic smd package l balanced and unbalanced operation possible terminals l gold-plated ni dimensions in mm, approx. weight 0,23 g pin configuration 4 input 5 input ground or balanced input 9 output 10 output ground or balanced output 1, 3, 6, 8 case C ground 2, 7 ground e lectrostatic s ensitive d evice ( esd ) type ordering code marking and package according to packing according to b4812 b39251-b4812-z710 c61157-a7-a49 f61074-v8127-z000 maximum ratings operable temperature range t C 25/+ 85 ?c storage temperature range t stg C 25/+ 85 ?c dc voltage v dc 0v source power p s 10 dbm
3 jul 11, 2003 saw components b4812 246,01 mhz low-loss filter data sheet characteristics reference temperature: t = 25 ?c terminating source impedance: z s = 700 ohm || -2,6 pf terminating load impedance: z l = 700 ohm || -2,6 pf 1) temperature dependence of f c : f c ( t ) = f c ( t 0 )(1 + tc f ( t C t 0 ) 2 ) test matching network to 50 w (element values depend on pcb layout): min. typ. max. nominal frequency f n 246,01 mhz minimum insertion attenuation a min 2,0 3,2 5,0 db (including loss in matching coils) amplitude ripple (p-p) da f n - 67,5 khz ... f n + 67,5 khz 0,6 2,0 db f n - 80,0 khz ... f n + 80,0 khz 0,7 3,0 db group delay ripple (p-p) dt f n - 50,0 khz ... f n + 50,0 khz 0,5 1,5 m s f n - 80,0 khz ... f n + 80,0 khz 1,2 3,0 m s relative attenuation (relative to a min ) a rel f n - 25,00 mhz ... f n - 3,00 mhz 50 60 db f n - 3,00 mhz ... f n - 1,60 mhz 48 60 db f n - 1,60 mhz ... f n - 0,60 mhz 38 50 db f n - 0,60 mhz ... f n - 0,40 mhz 28 40 db f n - 0,40 mhz ... f n - 0,20 mhz 8 14 db f n + 0,20 mhz ... f n + 0,40 mhz 8 14 db f n + 0,40 mhz ... f n + 0,60 mhz 28 40 db f n + 0,60 mhz ... f n + 1,60 mhz 38 50 db f n + 1,60 mhz ... f n + 3,00 mhz 48 60 db f n + 3,00 mhz ... f n + 25,00 mhz 50 60 db impedance at f n input: z in = r in || c in 700 || 2,6 w || pf output: z out = r out || c out 700 || 2,6 w || pf temperature coefficient of frequency 1) tc f C 0,036 ppm/k 2 frequency inversion point t 0 25 ?c c p1 = 1,8 pf l s2 =56nh l s3 =56nh c p4 = 1,8 pf
4 jul 11, 2003 saw components b4812 246,01 mhz low-loss filter data sheet transfer function : transfer function (pass band):
5 jul 11, 2003 saw components b4812 246,01 mhz low-loss filter data sheet published by epcos ag surface acoustic wave components division, saw mc wt p.o. box 80 17 09, 81617 munich, germany ? epcos ag 2003. reproduction, publication and dissemination of this brochure and the informa- t ion contained therein without epcos prior express consent is prohibited. purchase orders are subject to the general conditions for the supply of products and services of t he electrical and electronics industry recommended by the zvei (german electrical and electronic manufacturers association), unless otherwise agreed. t his brochure replaces the previous edition. for questions on technology, prices and delivery please contact the sales offices of epcos ag or t he international representatives. due to technical requirements components may contain dangerous substances. for information on t he type in question please also contact one of our sales offices.
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