LTM450IW LUGUANG | Alldatasheet
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- THIS SPECIFICATION SHALL CO VER THE CHARACTERISTICS OF CERAMIC FIL TER WITH 450KHz,INTENED FOR USE IN TR ANSCEIVERS,ETC. 2. PART NUMBER: LTM450IW 3. ELECTRONICAL SPECIFICATIONS A. CENTRE FREQUENCY(f 。) : 450 KHz±1.0KHz B. BAND WIDTH AT 6 dB : ±2.0 KHz MIN.(TO 450KHz) C. BAND WIDTH AT 50 dB : ±7.5 KHz MAX.(TO 450KHz) D. STOP BAND ATTENUATION : 40 dB MIN.(AT f 。±100KHz) E. RIPPLE : 2.0 dB MAX.( AT f 。±5.0KHz) 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 : 2.0 K Ω NOTE : A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL V ALUE OF THE BAND WTTH AL 6 dB B ) T E M P R A T U R E C O E F F I C I E N T O F C E N T E R F R E Q U E N C Y SHALL BE DEFINED AS THE A VERAGE OF THE CENTRAL FREQUECY . 4. 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 ℃ CUNLESS IT IS QUESTIONABLE. B. MEASURING CIRCUIT # S.S.G . (STANDARD SIGNAL GENERATION) LTM450IW Ceramic Filter http://www.luguang.cn mail:lge@luguang.cn
R.F.V .M. (RADIO FREQUENCY VOLTAGE METER) Rg+R1=R2=2.0KΩ C﹤=50PF 5. DIMENSIONS(mm) 6. ENVIRONMENTAL CHARACTERISTICS 6-1 HIGH TEMPERATURE EXPOSURE SUBJECT THE FITTER TO +80 ℃ FOR 96 HOURS. THEN RELEASE THE FILTER INTO THE SPECIFICATIONS IN TABLE 1. 6-2 MOISURE K E E P T H E F I L T E R A T 4 0℃ AND 95%RHFOR 96 HOURS.THEN R E L E A S E T H E F I L T E R I N T O T H E R O O M C O N D I T I O N S F O R 1 T O 2 HOURS PRIOR TO THE MEASUREMEN T. IT SHALL FULFILL THE SPECIFICATIONS IN TABLE 1. 6-3 LOW TEMPERATURE EXPOSURE S U B J E C T T H E F I L T E R T O - 2 0℃ FOR 96 HOURS. THEN RELEASE THE F I L T E R I N T O T H E R O O M C O N D I T I O N S F O R 1 T O 2 H O U R S P R I O R T O THE MEASUREMENT. IT SHALL FULFILL THE SPECIFIC ATIONS IN T A B L E 1 . LTM450IW Ceramic Filter http://www.luguang.cn mail:lge@luguang.cn
S U B J E C T T H E F I L T E R T O A L O W T E M P E R A T U R E O F - 5 5℃ 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 S P E C I F I C A T I O N S I N T A B L E 1 . 6 - 5 R E S I S T A N C E T O S O L D E R H E A T DIP THE FILTER TERMINALS NO CLOSER THAN 1.5mm INTO THE S O L D E R B A T H A T 2 7 0℃ ±10 ℃ FOR 10 ±1 SEC. THEN RELEASE THE FILTER IN TO THE ROOM CONDITIONS FOR 1 TO 2 HOURS. THE F I L T E R S H A L L M E E T THE SPECIFICATIONS IN TABLE 1. 6-6 MECHANICAL SHOCK D R O P T H E F I L T E R R A N D O MLY ONTO THE CONCRETE FLOOR FROM T H E H E I G H T O F 3 0 c m 3 T IMES.THE FILTER SHALL FULFILL THE S P E C I F I C A T I O N S I N T A B L E 1 . 6-7 VIBRATION SUBJECT THE FILTER TO THE VIBRATION FOR 1 HOUR EACH IN X,Y AND Z AXES WITH THE AMPLITUDE OF 1.5mm AT 10 TO 55Hz. THE FILTER SHALL FULFILLTHE SPECIFICATIONS IN TABLE 1. 6-8 LEAD FATIGUE 6 - 8 - 1 P U L L I N G T E S T W E I G H T A L O N G W I T H T H E D I R E C T I O N O F L E A D W I T H O U T A N S H O C K 3 K G . T H E F I L T E R S H A L L S A T I S F Y A L L T H E I N I T I A L L C H A R A C T E R I S T I C S . 6 - 8 - 2 B E N D I N G T E S T LEAD SHALL BE SUBJECT TO WITHSTAND AGAINST 90 ℃ BENDING IN THE DERECTION OF THICKNESS. THIS OPERATION S H A L L B E D O N E T O W A R D B O T H D I R E C T I O N . T H E F I L T E R S H A L L S H O W N O E V I D E N C E O F D A M A G E A N D S H A L L S A T I S F Y ALL THE INITIAL ELECTRIC AL CHARACTERISTICS. TABLE 1 I T E M S P E C I F I C A T I O N CENTRE FREQUENCY(f。) 450±1.0 KHz Max BAND WIDTH(6 dB) ±2.0 KHz Min SELECTIVITY(50 dB) ±7.5 KHz Max S T O P B A N D A T T E N U A T I O N 4 0 d B M i n RIPPLE 2.0 dB Max INSERTION LOSS 6.0 dB Max LTM450IW Ceramic Filter http://www.luguang.cn mail:lge@luguang.cn