LTWC455E Ceramic Filter 1. SCOPE This specification shall cover the characteristics of the ceramic filter with 455KHz. 2. PART NO.: LTWC455E 3. ELECTRICAL SPECIFICATIONS 3-1 Center frequency(fo) 455KHz±1.5KHz max. 3-2 Band Width at 6dB ±7.50KHz min.(to 455KHz) 3-3 Band Width at 50dB ±15.0KHz max.(to 455KHz) 3-4 Stop Band Attenuation 3-5 Ripple 3-6 Insertion Loss 50dB min. (at 455±100KHz max.) 2.0dB max.(at 455±5.0KHz) 6.0dB max.(at the smallest loss) 3-7 Temperature Coefficient ±50ppm/℃ max. of Center Frequency (-20℃ to +80℃) 3-8 Spurious Response 0.1-1.0MHz min. 25dB 3-9 Group Delay Time Deviation max. 30μsec.(455±4.0KHz) 3-10 Dielectric withstanding Voltage 100V.DC(1 minute) 3-11 Insulation Resistance(DC 10V) min.100MΩ 3-12 Input / Output Impedance 1.5KΩ 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℃. http://www.luguang.cn mail:[email protected] LTWC455E Ceramic Filter 4-2 Measuring Circuit 5. DIMENSION (Unit : mm) http://www.luguang.cn mail:[email protected] 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. http://www.luguang.cn mail:[email protected] 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 http://www.luguang.cn mail:[email protected]