Shoulder LTM455DU Center frequency shall be defied as the central value of the band with at 6 db Datasheet

SHOULDER ELECTRONICS LIMITED
CERAMIC FILTER Data Sheet
PRODUCT 产 品:
CERAMIC
MODEL NO 型 号:
LTM…U
PREPARED 编 制:
Fengyu
CHECKED 审 核:
York
APPROVED 批 准:
Lijiating
DATE
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日 期:
FILTER
2008-01-25
Page: 1
SHOULDER ELECTRONICS LIMITED
1. LTM 455(450)…U SERIES
Part
Number
Center
Insertion
Pass Band
6dB
40dB
Stop Band Att.
I/O
Frequency
Loss
Ripple
Bandwidth
Bandwidth
±100 KHz
Impedance
min
max
min
(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。)
: 450KHz±1.5KHz. MAX.
B. BAND WIDTH AT 6 dB
:
±10.0 KHzMIN.(TO 450KHz)
C. BAND WIDTH AT 40 dB
:
±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 : 1.5KΩ
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.
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SHOULDER ELECTRONICS LIMITED
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
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 MOISTURE
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
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Page: 3
SHOULDER ELECTRONICS LIMITED
6-4
6-5
6-6
6-7
6-8
FILTER INTO THE ROOM CONDITIONS FOR 1 TO 2 HOURS PRIOR TO
THE MEASUREMENT. IT SHALL FULFILL THE SPECIFICATIONS IN
TABLE 1.
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.
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 INTO THE ROOM CONDITIONS FOR 1 TO 2 HOURS. THE
FILTER SHALL MEET THE SPECIFICATIONS IN TABLE 1.
MECHANICAL SHOCK
DROP THE FILTER 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 1.5 mm AT 10 TO 55 Hz. 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 INITIAL
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 SHALLSATISFY
ALL THE INITIAL ELECTRICAL CHARACTERISTICS.
TABLE 1
ITEM
CENTRE FREQUENCY(f。)
BAND WIDTH(6 dB)
SELECTIVITY(40dB)
STOP BAND ATTENUATION
RIPPLE
INSERTION LOSS
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SPECIFICATION
450±1.5 KHz Max
±10.0 KHz Min
±20 KHz Max
30 dB Min
2.5 dB Max
4 dB Max
Page: 4
SHOULDER ELECTRONICS LIMITED
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