LT421AW [LGE]
Ceramic Filter; 陶瓷滤波器
LGE 
LT421AW
Ceramic Filter
1. THIS
SPECIFICATION
SHALL COVER THE
CHARACTERISTICS OF
CERAMIC FILTER
WITH 421KHz,INTENED FOR USE IN TRANSCEIVERS,ETC.
2. PART NUMBER : LT421AW
3. ELECTRONICAL SPECIFICATIONS
A. CENTRE FREQUENCY (f。)
:
421KHz±1.0KHz. MAX.
B. BAND WIDTH AT 6 dB
:
±10 KHzMIN.(TO 421KHz)
C.
D.
E.
F.
BAND WIDTH AT 50 dB
STOP BAND ATTENUATION :
:
±20 KHz MAX.(TO 421KHz)
45 dB MIN.(AT f。±100KHz)
2.0 dB MAX.(AT f。±5.0KHz)
4.0 dB MAX (AT THE SMALLEST LOSS)
RIPPLE
:
INSERTION LOSS
:
G. TEMPRATURE COEFFICIENT
OF CENTER FRENQUENCY
:
±50PPM/℃ Max.(-20 TO +80℃)
H. INPUT/OUTPUT IMPEDANCE : 1.5 KΩ
NOTE : A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL
VALUE OF THE BAND WITH AT 6 dB
B) TEMPRATURE COEFFICIENT OF CENTER FREQUENCY
SHALL BE DEFINED AS THE AVERAGE 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℃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 KΩ
C<=50 PF
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
LT421AW
Ceramic Filter
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 MOISURE
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
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
LT421AW
Ceramic Filter
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
SPECIFICATIONS IN TABLE 1.
THE
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 FULFILLTHE SPECIFICATIONS IN TABLE 1.
6-8 LEAD FATIGUE
6-8-1 PULLING TEST
WEIGHT ALONG WITH THE DIRECTION OF LEAD WITHOUT AN
SHOCK 3 KG. THE FILTER SHALL SATISFY ALL THE INITIALL
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
SHALL SHOW
NO EVIDENCE OF DAMAGE AND SHALL
SATISFY
ALL THE INITIAL ELECTRICAL CHARACTERISTICS.
TABLE 1
ITEM
SPECIFICATION
421±1.0 KHz Max
±10 KHz Min
±20 KHz Max
45 dB Min
CENTRE FREQUENCY(f。)
BAND WIDTH(6 dB)
SELECTIVITY(50dB)
STOP BAND ATTENUATION
RIPPLE
2.0 dB Max
INSERTION LOSS
4 dB Max
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
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