LTWC455E
Ceramic Filter
1.
SCOPE
This specification shall cover the characteristics of the ceramic filter with
455KHz.
2.
3.
PART NO.:
LTWC455E
ELECTRICAL SPECIFICATIONS
455KHz±1.5KHz max.
±7.50KHz min.(to 455KHz)
±15.0KHz max.(to 455KHz)
50dB min. (at 455±100KHz max.)
2.0dB max.(at 455±5.0KHz)
6.0dB max.(at the smallest loss)
±50ppm/℃ max.
(-20℃ to +80℃)
0.1-1.0MHz min. 25dB
max. 30μsec.(455±4.0KHz)
100V.DC(1 minute)
min.100MΩ
1.5KΩ
3-1 Center frequency(fo)
3-2 Band Width at 6dB
3-3 Band Width at 50dB
3-4 Stop Band Attenuation
3-5 Ripple
3-6 Insertion Loss
3-7 Temperature Coefficient
of Center Frequency
3-8 Spurious Response
3-9 Group Delay Time Deviation
3-10 Dielectric withstanding Voltage
3-11 Insulation Resistance(DC 10V)
3-12 Input / Output Impedance
Note 1) Center frequency shall be defined as the center of the band width 6dB.
Note 2) Temperature coefficient of center frequency shall be defined as the
average of the center frequency shift throughout the specified
temperature range.
4. MEASUREMENT
4-1 Measuring Condition
The reference temperature shall be 25±2℃. Unless the result is doubtful,
the measurement shall be performed in the temperature range of 5 to 35℃.
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LTWC455E
Ceramic Filter
6.ENVIRONMENTAL CHARACTERISTICS
6-1 Humidity
Keep the filter at 40℃ ± 2℃ and 90 to 95% RH for minimum 8 hours.
Then, release the filter into the room conditions for 1 hour prior to the
measurement. It shall fulfill the electrical specifications in section 3.
6-2 Vibration
Subject the filter to the vibration for 1 hour each in X, Y and Z axes with the
amplitude of 1.0mm at 10 to 55Hz. It shall fulfill the electrical specifications
in section 3.
6-3 Mechanical Shock
Drop the filter randomly onto a concrete floor from the height of 30cm 3
times. It shall fulfill the electrical specifications in section 3.
6-5 High Temperature Exposure
Put subject filter to chamber at 80 ± 5℃ for 96 ± 4 hours. Then, release
the filter into the room condition for 1 hour prior to the measurement. It
shall meet the electrical specifications in section 3.
6-6 Low Temperature Exposure
Put subject filter to –20 ± 5℃ for 96 ± 4 hours. Then, release the filter into
the room conditions for 1 hour prior to the measurement. It shall fulfill the
electrical specifications in section 3.
6-7 Temperature Cycling
Subject filter is put into low temperature of -40℃ for 30 minutes, followed
by a high temperature of +85℃ for 30 minutes. Cycling shall be repeated 5
times with a time interval of 15 minutes under room conditions. Then,
release the filter into the room conditions for 1 hour prior to the
measurement. It shall fulfill the electrical specifications in section 3.
6-8 Lead Fatigue
Weight 3Kg along to the direction of lead without a sudden shock. The filter
shall show no evidence of damage and shall satisfy all the initial characteristics.
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mail:lge@luguang.cn
LTWC455E
Ceramic Filter
7. Standard Reflow Soldering Condition
(1)Reflow
Filter is soldered once within the following temperature Condition and then being
placed in natural condition for 24 hours.
(2)Soldering Iron
Electrode is directly contacted with the tip of soldering iron of +260±5℃ for 3±1
seconds, and then being placed in natural condition for 24 hours.
8.PACKAGE FORM
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