LT421AW LUGUANG | Alldatasheet
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SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD. 1. THIS SPECIFICATION SHALL CO VER THE CHARACTERISTICS OF CERAMIC FILTER WITH 421KHz,INTEN ED FOR USE IN TRANSCEIVERS,ETC. 2. PART NUMBER : LT421AW 3. ELECTRONICAL SPECIFICATIONS A. CENTRE FREQUENCY (f。) : 4 2 1 K H z±1.0KHz. MAX. B. B A N D W I D T H A T 6 d B : ±10 KHzMIN.(TO 421KHz) C. B A N D W I D T H A T 5 0 d B : ±20 KHz MAX.(TO 421KHz) D. STOP BAND ATTENUATION : 45 dB MIN.(AT f 。±100KHz) E. RIPPLE : 2.0 dB MAX.(AT f 。±5.0KHz) 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 : 1.5 K 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) TEMPRATURE COEFFICIENT OF CENTER FREQUENCY SHALL BE DEFINED AS THE AVERAGE OF THE CENTRAL 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℃. I T S H A L L B E P O S S I B L Y D O N E 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 Ω C<=50 PF
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD. 5. DIMENSIONS(MM) 6. ENVIRONMENTAL CHARACTERISTICS 6-1 HIGH TEMPERATURE EXPOSURE SUBJECT THE FILTER TO +80 ℃ FOR 96 HOURS. THEN RELEASE THE F ILTER INTO THE SPECIFICATIONS IN TABLE 1. 6 - 2 M O I S U R E KEEP THE FILTER AT 40 ℃ AND 95% RH FOR 96 HOURS.THEN RELEASE THE FILTER INTO THE R OOM CONDITIONS FOR 1 TO 2 H O U R S P R I O R T O T HE MEASUREMENT. IT 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 . 6-3 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 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 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
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD. 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 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 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 SUBJECT THE FILTER TO TH E 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 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 ONG WITH THE DIRECTION OF LEAD WITHOUT AN S H O C K 3 K G . T H E FILTER SHALL SATISFY ALL THE INITIALL 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 SHALL BE DON E TOWARD BOTH DIRECTION. THE FILTER SHALL SHOW NO EVIDENCE OF DAMAGE AND SHALL SATISFY ALL THE INITIAL ELECTRICAL CHARACTERISTICS. TABLE 1 ITEM SPECIFICATION CENTRE FREQUENCY(f 。) 4 2 1 ±1.0 KHz Max B A N D W I D T H ( 6 d B ) ±10 KHz Min SELECTIVITY(50dB) ±20 KHz Max S T O P B A N D A T T E N U A T I O N 4 5 d B M i n RIPPLE 2.0 dB Max I N S E R T I O N L O S S 4 d B M a x