1.scope saw filter series have broad line up products meeting all broadcast standard including ntsc,pal and secam systems. these filters are composed of two interdigital transducers on a single -crystal. piezoelectrical chip. they are used in electronic equipments such as tv and so on. 2.construction 2.1 dimension and materials type : IF389B2M 0: year(0,1,2,3,4,5,6,7,8,9) b:product in this quarter(a:1~3,b:4~6,c:7~9,d:10~12)
2.2. circuit construction, measurement circuit 3.characteristics standard atmospheric conditions unless otherwise specified , the standard rang of atmospheric conditions for making measurements and tests is as follows; ambient temperatur e : 15?? to 35?? relative humidity : 25% to 85% air pressure : 86kpa to 106kpa operating temperature rang operating temperature rang is the rang of ambient temperatures in which the filter can be operated continuously. - 10?? ~ +60?? storage tempera ture rang storage temperature rang is the rang of ambient temperatures at which the filter can be stored without damage. conditions are as specified elsewhere in these specifications. - 40?? ~ +70?? reference temperature +25?? 3.1 maximum rating dc voltage vdc 12 v between any terminals ac voltage vpp 10 v between any terminals
3.2 electrical characteristics source impedance zs=50|? load impedance zl=2k|?//3pf t a =25?? items freq min typ max insertion attenuation reference level 37.40mhz 16.0 17.0 19.0 db 38.90mhz 4.3 5.8 7.3 db 34.47mhz -0.5 0.7 1.9 db 32.40mhz 16.6 18.6 20.6 db 33.40mhz 17.2 19.2 - db 30.90mhz 42.0 58.0 db 40.40mhz 40.0 50.0 db relative attenuation 41.40mhz 40.0 50.0 db 25.00~30.90mhz 35.0 45.0 db sidelobe 40.40~45.00mhz 34.0 42.0 db reflected wave signal suppression 1.2|s?6.0|s after main pulse (test pulse 250ns, carrier frequency 37.4mhz) 40.0 50.0 db feedthrough signal suppression 1.2|s?1.1|s before main pulse (test pulse 250ns, carrier frequency 37.4mhz) 42.0 52.0 - db group delay predistortion (reference frequenc y 38.90 mhz) 36.50 mhz 34.47 mhz - - - 70 20 - - ns ns impedance at 37.40 mhz: input: zin = rin // cin output zout=rout // cout - - 2.0//12.1 3.0 //2.8 - - k|?//pf k|?//pf temperature coefficient -72 ppm/k 3.3 environmental performance characte ristics item test condition allowable change of absolute level at center frequency(db) high temperature test 70?? 1000h < 1.0 low temperature test - 40?? 1000h < 1.0 h umidity test 40?? 90- 95% 1000h < 1.0 thermal shock - 20??==25??==80?? 20 cycle 30m 10m 30m < 1.0 solder temperature test sold temp.260?? for 10 sec. < 1.0 soldering more then 95% of total
immerse the pins melt solder at 260??+5/- 0?? for 5 sec. area of the pins should be covered with solder 3.4 mechanical test item test condition allowable change of absolute level at center frequency(db) vibration test 600- 3300rpm amplitude 1.5mm 3 directions 2 h each <1.0 drop test on maple plate from 1 m high 3 times <1.0 lead p ull test pull with 1 kg force for 30 seconds <1.0 lead bend test 90 o bending with 500g weigh 2 times <1.0 3.5 voltage discharge test item test condition allowable change of absolute level at center frequency(db) surge test between any two electrode <1.0
3.6 frequency response
time domain response:
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