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http://www.shoulder.cn shoulder electronics limited page: 1 shoulder electronics limited ceramic filter data sheet product ? : ceramic filter model no : lt u(w)c 455 prepared : fengyu checked : york approved ? : lijiating date : 2008-01-25
1. ltuc 455 series center frequency insertion loss min ripple max 6db bandwidth min 40db bandwidth max stop band att. fo 10 khz min i/o impedance part number (khz) (db) (db) (khz) (khz) (db) (ohm) LTUC455D 4551.5 4 2.0(fn 7.0 khz) 10.0 20.0 27 1500 ltuc455e 4551.5 6 2.0(fn 5.5 khz) 7.5 15.5 27 1500 ltuc455f 4551.5 6 2.0(fn 4.5 khz) 6.0 12.5 27 1500 ltuc455g 4551.5 6 2.0(fn 3.5 khz) 4.5 10.0 25 1500 dimension: http://www.shoulder.cn shoulder electronics limited page: 2
2. ltwc 455 series center frequency insertion loss min ripple max 6db bandwidth min 40db bandwidth max stop band att. fo 10 khz min i/o impedance part number (khz) (db) (db) (khz) (khz) (db) (ohm) ltwc455d 4551.5 4 2.0(fn 7.0 khz) 10.0 20.0 50 1500 ltwc455e 4551.5 4 2.0(fn 5.5 khz) 7.5 15.5 50 1500 ltwc455f 4551.5 6 2.0(fn 4.5 khz) 6.0 12.5 47 1500 ltwc455g 4551.5 6 2.0(fn 3.5 khz) 4.5 10.0 47 1500 dimension: http://www.shoulder.cn shoulder electronics limited page: 3
3. part numbering : LTUC455D 4. electronical specifications a. centre frequency (f ) : 455khz 1.5khz. max. b. band width at 6 db : 10.0 khz min.(to 455khz) c. band width at 40 db : 20.0 khz max.(to 455khz) d. stop band attenuation : 27 db min.(at f 100khz) e. ripple : 2.0 db max. f. insertion loss : 6.0 db max (at the smallest loss) g. temprature coefficient of center frenquency : 50ppm/ max.(-20 to +80 ) h. input/output impedance : 1.5k note : a) center frequency shall be defied as the central value of the band with at 6 db b) temperature coefficient of center frequency shall be defined as the average of the central frequecy. 5. measurement a. environmental condition measurement shall be carried out at the reference temperature of 25 2 . it shall be possibly done at 5 to 35 unless it is questionable. b. measuring circuit #s.s.g. (standard signal generation) r.f.v.m. (radio frequency voltage meter) rg+r1=r2=1.5 k c<=50 pf 6. environmental characteristics 6-1 high temperature exposure subject the filter to +80 for 96 hours. then release the f ilter into the room conditions for 1 to 2 hours http://www.shoulder.cn shoulder electronics limited page: 4
prior to the measurement. it shall fulfill the specifications in table 1. 6-2 moisture keep the filter at 40 and 95% rh for 96 hours.then release the filter into the room conditions for 1 to 2 hours prior to the measurement. it shall fulfill the specifications in table 1. 6-3 low temperature exposure subject the filter to -20 for 96 hours. then release the filter into the room conditions for 1 to 2 hours prior to the measurement. it shall fulfill the specifications in table 1. 6-4 temperature cycling subject the filter to a low temperature of -55 for 30 minutes. followsing by a high temperature of +85 for 30 minutes. then release the filter into the room conditions for 1 to 2 hours prior to the mesurement. it shall meet the specifications in table 1. 6-5 resistance to solder heat dip the filter terminals no closer than 1.5mm into the solder bath at 270 10 for 10 1 sec. then release the filter into the room conditions for 1 to 2 hours. the filter shall meet the specifications in table 1. 6-6 mechanical shock drop the filter randomly onto the concrete floor from the height of 30cm 3 times.the filter shall fulfill the specifications in table 1. 6-7 vibration subject the filter to the vibration for 1 hour each in x,y and z axes with the amplitude of 1.5 mm at 10 to 55 hz. the filter shall fulfill the specifications in table 1. 6-8 lead fatigue 6-8-1 pulling test weight al ong with the direction of lead without an shock 3 kg. the filter shall satisfy all the initial characteristics. 6-8-2 bending test lead shall be subject to withstand against 90 bending in the derection of thickness. this operation shall be done toward both direction. the filter http://www.shoulder.cn shall show no evidence of damage and shallsatisfy shoulder electronics limited page: 5
all the initial electrical characteristics. table 1 item specification centre frequency(f ) 455 1.5 khz max band width(6 db) 10.0 khz min selectivity(40db) 20.0 khz max stop band attenuation 27 db min ripple 2.0 db max insertion loss 6.0 db max 7standard refkow solderi ng conditions 7-1.reflow filter is soldered twice within the following temoerature conditions. 7-2.soldering iron electrode is directly soldered with the tip of soldering iro n at +3505 for 3.00.5 seconds. http://www.shoulder.cn shoulder electronics limited page: 6
8. dimensions of car rier tape. 9. dimensions of reel http://www.shoulder.cn shoulder electronics limited page: 7

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