LT390AW ceramic filter shenzhen luguang electronic technology co.,ltd. 1. scope this specification shall cover the char acteristics of the ceramic filter with 390khz. 2. part no.: LT390AW 3. electrical specifications 3-1 center frequency(fo) .390khz2.0khz max. 3-2 band width at 6db 25.0khz min.(to 390khz) 3-3 band width at 50db 50.0khz max.(to 390khz) 3-4 stop band attenuation 45db min. (at 390100khz max.) 3-5 ripple 2.0db max.(at 39010.0khz) 3-6 insertion loss 3.0db 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. 30 sec.(3904.0khz) 3-10 dielectric withstanding volta ge 100v.dc(1 minute) 3-11 insulation resistance(dc 10v) min.100m ? 3-12 input / output impedance 1.0k ? 10% note 1) center frequency shal l be defined as the center of the band width 6db. note 2) temperature coefficient of center frequency shall be defin ed as the average of the center frequen cy shift throughout the specified temperature range. 4. measurement 4-1 measuring condition the reference temperature shall be 252 . unless the result is doubtful, the measurement shall be performed in the temperature range of 5 to 35 . 4-2 measuring circuit rg + r1 = r2 = i nput / output impedance (1) input (2)(3)(4) ground (5) output
LT390AW ceramic filter shenzhen luguang electronic technology co.,ltd. 5. dimension (unit : mm) (1) input (2)(3)(4) ground (5) output *material instruction components materials, finish/specifications 1 terminal phosphor bronze/silver-plating 2 insulation resin epoxy resin(black) 3 case pbt 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 r oom conditions for 1 hour prior to the measurement. it shall fulfill the el ectrical 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 el ectrical 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 elec trical specifications in section 3. 6-4 solder heat ? resistance the filters shall be assembled to t he 1mm ?through-hole? p.c. board and placed in a solder solution (su 63% & pb 37%) at 250 10 twice for duration of 3 seconds. after removal fr om the solder solution chamber, the filters may be cleaned with chloroform an d left for more that 24 hours at the room temperature. it shall fulfill the electrical s pecifications 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
LT390AW ceramic filter shenzhen luguang electronic technology co.,ltd. 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 r oom conditions for 1 hour prior to the measurement. it shall fulfill the el ectrical specifications in section 3. 6-8 lead fatigue 6-8-1 pulling test weight 3kg along to the directi on of lead without a sudden shock. the filter shall show no evidence of damage and shall satisfy all the initial characteristics. 6-8-2 bending test lead shall be subject to withstand agai nst 90bending in the direction of thickness. this operation shall be done towards both directions. the filter shall show no evidence of damage and shall satisfy all the initial electrical characteristics.
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