LTM-U SHOULDER | Alldatasheet

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Http://www.shoulder.cn SHOULDER ELECTRONICS LIMITED Page: 1 SHOULDER ELECTRONICS LIMITED CERAMIC FILTER Data Sheet PRODUCT 产 品: CERAMIC FILTER MODEL NO 型 号: LT M…U PREPARED 编 制: Fengyu CHECKED 审 核: York APPROVED 批 准: Lijiating DATE 日 期: 2008-01-25

  1. LTM 455(450)…U SERIES Center Frequency Insertion Loss Pass Band Ripple 6dB Bandwidth min 40dB Bandwidth max Stop Band Att. ±100 KHz min I/O Impedance P a r t Number (KHz) (dB) (dB) (KHz) (KHz) (dB) (Ohm) LTM450BU 450±2.0 4 2 ±15 ±30 30 1500 LTM455BU 455±2.0 4 2 ±15 ±30 30 1500 LTM450CU 450±2.0 4 2 ±12.5 ±24 30 1500 LTM455CU 455±2.0 4 2 ±12.5 ±24 30 1500 LTM450DU 450±1.5 4 2 ±10 ±20 30 1500 LTM455DU 455±1.5 4 2 ±10 ±20 30 1500 LTM450EU 450±1.5 6 2 ±7.5 ±15 30 1500 LTM455EU 455±1.5 6 2 ±7.5 ±15 30 1500 LTM450FU 450±1.5 6 2 ±6 ±12.5 30 2000 LTM455FU 455±1.5 6 2 ±6 ±12.5 30 2000 LTM450GU 450±1.5 6 2 ±4.5 ±10 30 2000 LTM455GU 455±1.5 6 2 ±4.5 ±10 30 2000 LTM450HU 450±1.0 6 2 ±3 ±9 30 2000 LTM455HU 455±1.0 6 2 ±3 ±9 30 2000 LTM450IU 450±1.0 6 2 ±2 ±7.5 30 2000 LTM455IU 455±1.0 6 2 ±2 ±7.5 30 2000 LTM450HTU 450±1.0 6 2 ±3 ±9 35 2000 LTM455HTU 455±1.0 6 2 ±3 ±9 35 2000 2. PART NUMBERING : LTM450DU 3. ELECTRONICAL SPECIFICATIONS A. CENTRE FREQUENCY (f。) : 4 5 0 K H z±1.5KHz. MAX. B. B A N D W I D T H A T 6 d B : ±10.0 KHzMIN.(TO 450KHz) C. B A N D W I D T H A T 4 0 d B : ±20 KHz MAX.(TO 450KHz) D. STOP BAND ATTENUATION : 30 dB MIN.(AT f 。±100KHz) E. RIPPLE : 2.0 dB MAX. F. INSERTION LOSS : 4.0 dB MAX (AT THE SMALLEST LOSS) G. TEMPRATURE COEFFICIENT OF CENTER FRENQUENCY : ±50PPM/℃ Max.(-20 TO +80℃) H. INPUT/OUTPUT IMPEDANCE : 1.5K Ω NOTE : A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL V A L U E O F T H E B A N D W I T H A T 6 d B 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 S H A L L B E D E F I N E D A S T H E A V E R A G E O F T H E C E N T R A L F R E Q U E C Y . 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℃UNLESS IT IS QUESTIONABLE. Http://www.shoulder.cn SHOULDER ELECTRONICS LIMITED Page: 2

B. MEASURING CIRCUIT #S.S.G . (STANDARD SIGNAL GENERATION) R.F.V .M. (RADIO FREQUENCY VOLTAGE METER) Rg+R1=R2=1.5 K Ω C<=50 PF 5. DIMENSIONS(MM) 6. ENVIRONMENTAL CHARACTERISTICS 6-1 HIGH TEMPERATURE EXPOSURE S U B J E C T T H E F I L T E R T O + 8 0℃ FOR 96 HOURS. THEN RELEASE THE F I L T E R I N T O T H E S P E C I F I C A T I O N S I N T A B L E 1 . 6 - 2 M O I S T U R E K E E P T H E F I L T E R A T 4 0℃ AND 95% RH FOR 96 HOURS.THEN RELEASE THE FILTER INTO THE ROOM CONDITIONS FOR 1 TO 2 H O U R S P R I O R T O T H E M E A S U R E M E N T . I T S H A L L F U L F I L L T H E S P E C I F I C A T I O N S I N T A B L E 1 . 6-3 LOW TEMPERATURE EXPOSURE SUBJECT THE FILTER TO -20 ℃ FOR 96 HOURS. THEN RELEASE THE Http://www.shoulder.cn SHOULDER ELECTRONICS LIMITED Page: 3

F I L T E R I N T O T H E R O O M CONDITIONS FOR 1 TO 2 HOURS PRIOR TO T H E M E A S U R E M E N T . I T SHALL FULFILL THE SPECIFICATIONS IN T A B L E 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 F O R 1 T O 2 H O U R S P R I O R T O T H E M E S U R E M E N T . I T S H A L L M E E T T H E 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 D I P T H E F I L T E R T E R M I N A L S N O C L O S E R T H A N 1 . 5 m m I N T O T H E S O L D E R B A T H A T 2 7 0℃ ±10℃ FOR 10 ±1 SEC. 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 . T H E 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 S P E C I F I C A T I O N S I N T A B L E 1 . 6 - 7 V I B R A T I O N S U B J E C T T H E F I L T E R T O 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 F I L T E R S H A L L F U L F I L L T H E S P E C I F I C A T I O N S I N T A B L E 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 ONG WITH THE DIRECTION OF LEAD WITHOUT AN 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 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 ELECTRICAL CHARACTERISTICS. TABLE 1 ITEM SPECIFICATION CENTRE FREQUENCY(f 。) 4 5 0 ±1.5 KHz Max B A N D W I D T H ( 6 d B ) ± 10.0 KHz Min SELECTIVITY(40dB) ± 20 KHz Max S T O P B A N D A T T E N U A T I O N 3 0 d B M i n RIPPLE 2.5 dB Max I N S E R T I O N L O S S 4 d B M a x Http://www.shoulder.cn SHOULDER ELECTRONICS LIMITED Page: 4