LT455HTU
Ceramic Filter
1. THIS SPECIFICATION SHALL COVER THE CHARACTERISTICS OF
CERAMIC FIL TER WITH 455KHz,INTENED FOR USE IN TRANSCEIVERS,ETC.
2. PART NUMBER:
LT455HTU
3. ELECTRONICAL SPECIFICATIONS
A. CENTRE FREQUENCY(f。)
: 455KHz±1.0KHz
B. BAND WIDTH AT 6 dB
: ±3.0KHzMIN.(TO 455KHz)
C. BAND WIDTH AT 40 dB
: ±9.0KHzMAX.(TO 455KHz)
D. STOP BAND ATTENUATION
: 35 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
:
2.0KΩ
NOTE : A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL
VALUE OF THE BAND WTTH AL 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℃ CUNLESS IT IS QUESTIONABLE.
B.
MEASURING CIRCUIT
#S.S.G.
(STANDARD SIGNAL GENERATION)
R.F.V.M.
(RADIO FREQUENCY VOLTAGE METER)
Rg+R1=R2=2.0KΩ
C﹤=50PF
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
LT455HTU
Ceramic Filter
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
KEEP THE FILTER AT 40℃ AND 95%RHFOR 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 SPECIFIC ATIONS IN
TABLE 1.
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
LT455HTU
Ceramic Filter
6-4
6-5
6-6
6-7
6-8
TEMPERATURE CYCLING
SUBJECT THE FILTER TO ALOW 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.
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 IN TO THE ROOM CONDITIONS FOR 1 TO 2 HOURS. THE
FILTER SHALL MEET THE SPECIFICATIONS IN TABLE 1.
MECHANICAL SHOCK
DROP THE FIL TER RANDOMLY ONTO THE CONCRETE FLOOR FROM
THE HEIGHT OF 30cm 3 TIMES.THE FILTER SHALL FULFILL THE
SPECIFICATIONS IN TABLE 1.
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.
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 FIL TER
SHALL SHOW NOEVIDENCE OF DAMAGE AND SHALL SATISFY
ALL THE INITIAL ELECTRIC AL CHARACTERISTICS.
TABLE 1
ITEM
CENTRE FREQUENCY(f。)
BAND WIDTH(6 dB)
SELECTIVITY(40 dB)
STOP BAND ATTENUATION
RIPPLE
INSERTION LOSS
SPECIFICATION
455±1.0 KHz Max
±3.0 KHz Min
±9.0 KHz Max
35 dB Min
2.0 dB Max
6.0 dB Max
SHENZHEN LUGUANG ELECTRONIC TECHNOLOGY CO.,LTD.
FPGA/CPLD
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