1. scope the 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: BF43A2D 3 . 8 1 . 2 5 14.5 2.54 0.54 5 . 8 3 . 5 1 2 3 4 5 pin configuration 1 input 2 input-ground 3 chip carrier-ground 4 output 5 output hd
2.2. circuit construction, measurement circuit 3.characteristics st andard atmospheric conditions unless otherwise specified , the standard rang of atmospheric conditions for making measurements and tests is as follows; ambient temperature : 15c to 35c 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. - 10c ~ +60c storage temperature 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. - 40c ~ +70c reference temperature +25c 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 ohm load impedance z l =2k ohm//3pf t a =25c item freq min typ max center frequency fo - 43.75 - mhz insertion attenuation reference level 43.81mhz 12.8 14.8 16.8 db b 3db - 6.0 - mhz pass bandwidth b 30db - 7.6 - mhz 41.28mhz - 0.3 - db 46.34mhz - 1.3 0.2 1.7 db 40.81mhz 1.1 2.7 4.3 db 46.81mhz 1.1 2.7 4.3 db 39.81mhz 36.0 50.0 - db relative attenuation 47.81mhz 35.0 48.0 - db 35.06~39.06mhz 36.0 45.0 db 39.06~39.81mhz 34.0 42.0 db 47.81~50.06mhz 34.0 42.0 db si delobe 50.06~55.06mhz 36.0 46.0 db temperature coefficient - 72 ppm/k 3.3 environmental performance characteristics item test condition allowable change of absolute level at center frequency(db) high temperature test 70c 1000h < 1.0 low temperature test - 40c 1000h < 1.0 h umidity test 40c 90- 95% 1000h < 1.0 thermal shock - 20c==25c==80c 20 cycle 30m 10m 30m < 1.0 solder temperature test sold temp.260c for 10 sec. < 1.0 soldering immerse the pins melt solder at 260c+5/- 0c for 5 sec. more then 95% of total 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 pull 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
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