shenzhen luguang electronic technology co.,l td . 1. application this specification is applied to ceramic discirminator: CDBM455C28 used for quadrature detection with ic: ta31142f(toshiba) 2. model name 3. dimensions: ( mm ) 4. packaging the products should be packaged for [roducting from the accident which could be caused during transportation or preservation. and part name. quantity and inspection lot no. shall be give n to the each minimun packaging unit part name customer?s part no., customer?s draving no., CDBM455C28 material list case polybutcnetelephthalate (mixture of glass fiber) terminal phosphor bronze ag clad CDBM455C28 ceramic discriminator
shenzhen luguang electronic technology co.,l td . 5. maximum ratings 5.1 withstanding voltage d.c. 5ov. 1 minute (betwccn cach terminal) 5.2 insulation resistance 100 m min. at d.c.100v (between each terminal) 5.3 input signal level 5db (50 termination) 5.4 operating temperature range -20 to +80 5.5 storage temperature range -40 to +80 6. electrical characteristics ( 0 to + 40 ) item requirements 6-1 recoverd audio 3db bandwitdth (from 455khz) 4.0 khz min 6-2 recoverd audio output voltage (at 455khz) 40 20 mv 6-3 distortion(at 455khz) 3.0% max 6-4 withstanding voltage 50v d.c. for 1 inute 6-5 test method input signal condition input level : 80db frequency deviation : 4.0khz modulation frequency : 1 khz 1) recoverd audio input the above signal and sweep the carrier frequcncy 3db bandwidth around 455khz and find out the maximum audio output frequcncy. then sweep the carrier frequency again and find two frequencies which are obscrvcd -3db attenuation points from the maximum point. higher frequency point is called (f1) and lowcr called (f2), (f1-455khz)is defined as upper 3db bandwidth and (455khz-f2) defined as upper 3db bandwidth. 2) recoverd audio recoverd audi o output voltage shall be measured output voltage when carrier frequency is adjusted to 455khz. 3) distortion carrier fr equency is adjusted to 455khz. and then, distorion shall be measured with 1 khz modulation frequency. 6-6 test circuit it is shown in fig 1 CDBM455C28 ceramic discriminator
shenzhen luguang electronic technology co.,l td . 7. prysical and environmental characteristics test item condition of test requirements 7-1 lead strength lead pulling lead bending after force 1.0kg is applie d to each lead in axial direction. filter shall be measured. when force of 0.5kg is applied to each lead in axial direction the lead shall be folded up to 90 from the axial direction and folded back to the axial direction. no mechanical damage and the measured values shall meet item 6. 7-2 vibration filter shall be measured after being applied vibration of amplitude of 1.5mm with 600 to 3,300 r.p.m. band of vibration frequency to each of 3 perpendicular directions for 1 hour. the measured values shall meet table 1. 7-3 random drop filter shall be measured after 3 times random dropping from the height of 30cm on concrete floor 7-4 temperaturc characteristics filter shall be measured within -20 to +80 temperature range. 7-5 humidity filter shall be measured after being placed in a chamber with 90 to 95%r.h.at 402 for 100 hours and then being placed in natural condition for 1 hour. 7-6 resiatance to soldering hoat lead terminals are imme rsed up to 1.5mm from filter?s body in soldering bath of 2605 for 50.5 seconds and then filter shall be measured after being placed in natural condition for 1 hour. 7-7 life test (high temperature) filter shall be measured after being placed in chamber with 80 for 100 hours and then being placed in natural condition for 1 hour. 7-8 life test (low temperature) filter shall be measured after being placed in a chamber with -30 for 100 hours and then being placed in natural condition for 1 hours. 7-9 thermal shock after temperature cycling of -55 (30 minutes) to +85 (30 minutes) was performed 5 times filter shall be returned to room temperature.and filter shall be measured after being placed in natura l coudition for 1 hours. CDBM455C28 ceramic discriminator
shenzhen luguang electronic technology co.,l td . table 1. item requrements recoverd audio 3db bandwidth (from 455khz) 4.0 khz min recoverd audio output voltage (at 455khz) 40 20 mv distortion (at 455khz) 3.0 % max withstanding voltage 50v d.c.for 1 minute. test circuit for ceramic discriminator CDBM455C28 ceramic discriminator
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