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www.rfm.com e-mail: info@rfm.com page 1 of 5 ?2008 by rf monolithics, inc. SF2148B - 7/9/09 1. unless noted otherwise, all specifications apply over the operating temperature range with filter soldered to the specified d emonstration board with impedance matching to 50 ? and measured with 50 ? network analyzer. 2. unless noted otherwise, all frequency specifications are referenced to the nominal center frequency, fc. 3. the design, manufacturing process, and specifications of this filter are subject to change. 4. either port 1 or port 2 may be used for either input or output in the design. however, impedances and impedance matching may vary between port 1 and port 2, so that the filter must always be installed in one direction per the circuit design. 5. us and international patents may apply. electrical characteristics characteristic sym notes min typ max units nominal center frequency f c 1 138.24 mhz insertion loss at f c il 10.5 db 1 db passband, 128.24 to 148.24 mhz bw 1 1, 2 20 mhz amplitude ripple over 20 mhz passband 1db p-p group delay ripple over 20 mhz passband gd p-p 50 ns p-p rejection: 1, 2, 3 dbc 0 to 108.24 mhz 54 108.24 to 117.52 mhz 50 122.88 mhz 45 220.4 to 271.12 mhz 50 271.12 to 1000 mhz 40 1 db compression 12 dbm input ip3 35 dbm operating temperature range t a 1-40 +85c input/output impedance 200 ohms balanced or 50 ohms unbalanced case style 6 smp-03-s 7 x 5 mm nominal footprint lid symbolization (yy=year, ww=week, s=shift) see note 4 rfm SF2148B yywws smp-03-s ? designed for td-scdma applications low insertion loss 5.0 x 7.0 mm surface-mount case complies with directive 2002/95/ec (rohs) absolute maximum ratings rating value units maximum incident power in passband +10 dbm maximum dc voltage between any two terminals 30 vdc storage temperature range in tape and reel -40 to +85 c maximum soldering profile 265 c for 10 s 138.24 mhz saw filter SF2148B pb caution: electrostatic sensitive device. observe precautions for handling. notes: preliminary
www.rfm.com e-mail: info@rfm.com page 2 of 5 ?2008 by rf monolithics, inc. SF2148B - 7/9/09 SF2148B broadband response SF2148B passband response

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www.rfm.com e-mail: info@rfm.com page 3 of 5 ?2008 by rf monolithics, inc. SF2148B - 7/9/09 SF2148B group delay deviation & amplitude ripple ch1 s21 del 20 ns/ ref 640 ns ce nter 13 8 . 240 0 00 mhz spa n 2 4 . 000 0 00 mhz c smo c h 2 s 21 l og 1 db/ ref -9.9 68 db c 5 sep 20 08 09:24:48 1 2 2 : -7 . 2 586 n s 20 . 00 0 00 0 mh z re f= 1 ch1 markers me an : 6 42 . 55 n s s . d ev : 7 . 126 6 n s p- p : 3 2 . 3 29 ns 1 2 2 : - . 01 590 d b 20 . 00 0 00 0 mh z re f= 1 ch2 markers mean : -9 . 3101 db s . dev : . 13420 db p- p : . 70 180 db sf21 48 b, unit # 50 de mo full full ch 1 s1 1 1 u fs center 138 . 240 0 00 mhz span 10 0 . 000 000 mh z cor ch 2 s2 2 1 u f s cor 4 sep 2008 16:02:18 1 1: 47 . 832 -8 . 2207 140 . 05 p f 138 . 240 000 mhz 1 1: 31 . 293 23 . 648 27 . 2 26 nh 138 . 240 000 mhz SF2148B, unit #50 demo full full SF2148B input/output impedance plots
www.rfm.com e-mail: info@rfm.com page 4 of 5 ?2008 by rf monolithics, inc. SF2148B - 7/9/09 tape and reel specifications ?b ? nominal size quantity per reel inches millimeters 7 178 500 13 330 2000 user direction of feed component orientation and dimensions pin #1 see detail "a" 1 3 . 0 2 0 . 2 2.0 12.0 1 0 0 r e f . " b " r e f . 16.0 carrier tape dimensions tolerance ao 5.5 mm 0.1mm bo 7.5 mm 0.1mm ko 2.0 mm 0.1mm pitch 8.0 mm 0.1mm w 16.0 mm 0.2mm
www.rfm.com e-mail: info@rfm.com page 5 of 5 ?2008 by rf monolithics, inc. SF2148B - 7/9/09 smp-03-s case 12-terminal ceramic surface-mount case 5 x 7 mm nominal footprint case dimensions dimension mm inches min nom max min nom max a 6.80 7.00 7.20 0.268 0.276 0.283 b 4.80 5.00 5.20 0.189 0.197 0.205 c 1.65 2.00 0.065 0.079 d 0.80 e 2.41 2.54 2.67 0.095 0.100 0.105 h 0.87 1.1 1.13 0.034 0.039 0.044 j 2.54 k 2.87 3.00 3.13 0.113 0.118 0.123 p 1.14 1.27 1.40 0.045 0.050 0.055 materials solder pad plating 0.3 to 1.0 m gold over 1.27 to 8.89 m nickel lid plating 2.0 to 3.0 m nickel body al 2 o 3 ceramic pb free pb electrical connections input 1, 10 output 6, 5 ground 2, 3, 4, 7, 8, 9, 11, 12

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