saw bandpass filter 251908B part no. 251908B 1. features z if bandpass filter z high attenuation z single-ended operation z dip package z maximum storage temperature range : -40 ~ 85 z electrostatics sensitive device (esd) 2. package dimension 2.50.2 12.70.2 0.450.05 2.50.2 7.60.2 6.0max 5.5max 20.30.5 12.70.5 itf 05a001 251908B package : d2012 pin configuration 1 input 5 output 2, 4 ground 3, 6 case ground dimensions shown are nominal in millimeters base : fe(spcc), au plating over ni plated cap : cu & cr alloy, ni plated termination : kovar, au plated rev. date 2005-03-07 i t f co., ltd. 102-901, bucheon technopark 364, samjeong-dong, ojeong-gu, bucheon-city, gyounggi-do, korea 421-809 rev. nm5008-cs01 1/5
saw bandpass filter 251908B 3. specifications fo = 140.0 mhz terminating source impedance : 50 and matching network terminating load impedance : 50 and matching network minimum typical maximum center frequency mhz 139.85 140.0 140.15 insertion loss db - 27.0 28.0 1db bandwidth mhz - 19.1 - 3db bandwidth mhz 19.4 19.55 - 10db bandwidth mhz - 20.2 20.3 40db bandwidth mhz 21.1 21.3 amplitude ripple (fo +/- 9.375 mhz) db - 0.8 1.2 group delay variation (fo +/- 9.375 mhz) nsec - 30 100 absolute delay usec - 3.2 - ultimate rejection db 50 52 - temperature coefficient of frequency ppm/c 2 - -23 - notes : 1) all specifications are based on the matching schematic shown below 2) all specifications are measured by agilent network an alyzer and full 2 port calibration at room temperature 3) all attenuation measurements are m easured relative to insertion loss part no. 251908B rev. date 2005-03-07 i t f co., ltd. 102-901, bucheon technopark 364, gyounggi-do, korea 421-809 rev. nm5008-cs01 2/5 samjeong-dong, ojeong-gu, bucheon-city,
saw bandpass filter 251908B part no. 251908B 4. matching schematic ( actual matching values may vary due to pcb layout and parasitics ) output 50 l4 l3 l2 input 50 l1 l1 = 82nh, l2 = 68 nh l3 = 68nh, l4 = 68 nh 5. marking configuration itf 1) 05a001 2) 251908B 3) 1) manufacturer name 2) lot number 3) part number rev. date 2005-03-07 i t f co., ltd. 102-901, bucheon technopark 364, samjeong-dong, ojeong-gu, bucheon-city, gyounggi-do, korea 421-809 rev. nm5008-cs01 3/5
saw bandpass filter 251908B part no. 251908B 6. typical performance ( at +25 ) ch1 s21 log 10 db/ ref -27.05 db start 113 . 500 000 mhz stop 166 . 500 000 mhz rev. date 2005-03-07 i t f co., ltd. 102-901, bucheon technopark 364, samjeong-dong, ojeong-gu, bucheon-city, gyounggi-do, korea 421-809 rev. nm5008-cs01 4/5 cor 5 mar 2005 13:04:59 1 2 3 4 1: 0. 0000 db 0. 000 000 mhz ref=1 ch1 markers 4 mhz mhz q: 6. 6316 1_loss : -27 . 192 db bw: 21. 10742 cent : 139 . 974967 ch1 s21 log 1 db/ ref -27.05 db cor ch2 s21 del 100 ns/ ref 3.193 us center 140 . 000 000 mhz span 23. 000 000 mhz cor smo 5 mar 2005 13:08:29 1 2 3 4 1: 0. 0000 db 0. 000 000 mhz ref=1 ch1 markers bw: 19. 604835 mhz cent : 139 . 985512 mhz q: 7. 1404 1_loss : -27 . 131 db 2 3 3: -5 . 5957 ns 18. 750 000 mhz ref=2 ch2 markers mean : 3. 2032 us s. dev : 4. 8163 ns p-p : 25. 210 ns
saw bandpass filter 251908B part no. 251908B ch1 ch1 s21 log 10 db/ ref -27.16 db start . 010 000 mhz stop 500 . 000 000 mhz 5 mar 2005 13:12:17 1 2 3 1: 0. 0000 db 0. 000 000 mhz ref=1 ch1 markers 2: -64 . 595 db 140 . 000 mhz 3: -60 . 002 db 280 . 000 mhz rev. date 2005-03-07 i t f co., ltd. 102-901, bucheon technopark 364, samjeong-dong, ojeong-gu, bucheon-city, gyounggi-do, korea 421-809 rev. nm5008-cs01 5/5 s2 1 log 1 db/ ref -27.05 db cor ch2 s2 1 log 1 db/ ref -27.39 db center 140 . 000 000 mhz span 23. 000 000 mhz cor 5 mar 2005 13:07:53 1 2 3 4 1: 0. 0000 db 0. 000 000 mhz ref=1 ch1 markers bw: 19. 198583 mhz cent : 139 . 988173 mhz q: 7. 2916 1_loss : -27 . 128 db 2 3 3: . 04010 db 18. 750 000 mhz ref=2 ch2 markers mean : -27 . 263 db s. dev : . 10730 db p-p : . 45230 db ch1 s11 1 u fs cor ch2 s22 1 u fs center 140 . 000 000 mhz span 53. 000 000 mhz cor 5 mar 2005 13:11:25 1 1: 24. 696 -3 . 4697 327 . 64 pf 140 . 000 000 mhz 2 2: 47. 131 -63 . 705 17. 845 pf 140 . 000 000 mhz ch1 s1 1 swr 5 / ref 2.038 start 113 . 500 000 mhz stop 166 . 500 000 mhz cor ch2 2 swr 5 / ref 3.431 cor s2 5 mar 2005 13:11:18 1 1: 2. 0374 140 . 000 000 mhz 2 2: 3. 4299 140 . 000 000 mhz
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