1. application this specification is applie d to ceramic discriminator : cdbc450c 54 used for quadrature detection w ith ic : ta31142f (toshiba ) 2. specification no.: qj/a5 ? 25 ? 0512 model name part name customer?s part no. customer?s draving no. cdbc4 50c54 3. dimensions : ( mm ) 4. maximum ratings 4.1 withstanding voltage : d.c. 5ov. 1 minute (between each terminal) 4.2 insulation resistance : 100 m min. at d.c. 100v (between each terminal) 4.3 input signal level : 5db (50 termination ) 4.4 operating temperature range : - 20 to + 80 4.5 storage temperature range : -40 to +85 material list case polybutenetelephthalate (mixture of glass fiber) terminal phosphor bronze ag clad base sealing epoxy resin CDBC450C54 ceramic discriminator shenzhen luguang electronic technology co.,l td .
5. electrical characteristics ( 0 to + 40 ) item requirements 5-1 receiver audio 3db bandwitdth (from 450khz) 4.0 khz min. 5-2 receiver audio output voltage (at 450khz) 40 20 mv 5-3 distortion (at 450 khz) 3.0% max. 5-4 withstanding voltage 50v d.c. for 1 minute 5-5 test method input signal condition input level : 80db frequency deviation : 4.0khz modulation frequency : 1 khz 1) recoverd audio input the above si gnal and sweep the carrier frequency 3db bandwidth around 450 khz and find out the maximum audio output fre quency. then sweep the carrier frequency again a nd find two frequencies which are observed -3db attenuation points from the maximum point . higher frequency point is called (f1) and lower called (f2), (f1-455khz)is defined as upper 3db bandwidth and (455khz-f2) defined as lower 3 db bandwidth. 2) receiver audio receiver audio output voltage shall be measured output voltage when carrier frequency is adjusted to 450khz. 3) distortion carrier fre quency is adjusted to 450khz. and then ,distortion shall be measured with 1 khz modulation frequency. 6. prysical and enviro nmental characteristics test item condition of test requirements 6-1 lead strength lead pulling lead bending after force 1.0kg is applied 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 5. 6-2 vibration filter shall be measured after being applied vibration o f CDBC450C54 ceramic discriminator shenzhen luguang electronic technology co.,l td .
amplitude of 1.5mm with 600 to 3,300 r.p.m. band o f vibration frequency to each of 3 perpendicular directions for 2 hour . 6-3 random drop filter shall be measured after 3 times random dropping from the height of 30cm on concrete floor 6-4 temperature characteristics filter shall be measured within -20 to +80 temperature range. 6-5 humidity filter shall be measured after being placed in a chamber with 90 to 95% r. h. at 40 2 for 100 hours and then being placed in natural condition for 2 hour. the measured values shall meet table 1. 6-6 resistance to soldering heat lead terminals are immersed up to 1.5mm from filter?s body in soldering bath of 260 5 for 5 0.5 seconds and then filter shall be meas ured after being placed in natural condition for 2 hour. 6-7 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 2 hour. 6-8 life test low temperature filter shall be measured after being placed in a chamber with -20 for 100 hours and then being placed in natural condition for 2 hours. 6-9 thermal shock after temperature cycling of -20 30 minutes to +80 30 minutes was performed 5 times. filter shall be returned to room temperature. and filter shall be measured after being placed in natural condition for 2 hours. item requrements receiver audio 3db bandwidth (from 450khz) 4.0 khz min. receiver audio output voltage (at 450khz) 40 20 mv distortion ( at 450khz) 4.0 % max. withstanding voltage 50v d. c. for 1 minute. table 1. CDBC450C54 ceramic discriminator shenzhen luguang electronic technology co.,l td .
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