www.rfm.com e-mail: info@rfm.com page 1 of 5 ?2009 by rf monolithics, inc. SF2157A - 7/10/09 electrical characteristics characteristic sym notes min typ max units center frequency f c 1 156 mhz 1 db bandwidth bw 1 1 20.0 22.0 mhz 3 db bandwidth bw 3 1 21.0 24.0 mhz 40 db bandwidth bw 40 12730mhz insertion loss il 1 10.0 12.0 db attenuation relative to il 1, 2, 3 db 0 to123 mhz 45 50 190 to 1000 mhz 45 50 passband ripple, 146 to 166 mhz 1, 2, 3 1.0 1.8 db p-p absolute group delay, 156 mhz 1.13 1.50 s group delay ripple, 146 to 166 mhz 30 100 ns p-p operating temperature range 1 -40 +85 c source impedance 50 ohm vswr to source through matching network 1.4:1 2:1 load impedance 50 ohm vswr to load through matching network 1.4:1 2:1 frequency temperature coefficient -94 ppm/k impedance matching to 50 ? unbalanced external l-c case style sm13365-12 13.3 x 6.5 mm nominal footprint lid symbolization (yy = year, ww = week) rfm SF2157A yyww ? designed for wimax applications low insertion loss if filter hermetic 13.3 x 6.5 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 -50 to +125 c suitable for lead-free soldering - maximum soldering profile 260 c for 30 s 156 mhz saw filter SF2157A sm13365-12 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. rejection is measured as attenuation below the minimum il point in the passband. rejection in final user application is depen dent on pcb layout and external impedance matching design. see application note no. 42 for details. 4. part to part absolute delay measurement records the absolute delay mean across 1 db passband. 5. "lrip" or "l" after the part number indicates "low rate initial production" and "eng" or "e" indicates "engineering prototype s.? 6. the design, manufacturing process, and specifications of this filter are subject to change. 7. 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. 8. us and international patents may apply. pb caution: electrostatic sensitive device. observe precautions for handling. notes:
www.rfm.com e-mail: info@rfm.com page 2 of 5 ?2009 by rf monolithics, inc. SF2157A - 7/10/09 s 11 , s 22 and s 21 filter plots ch1 s11 1 u fs c entr 15 6 . 000 m h z spa n 2 00 . 00 0 mh z cor ch2 s2 1 lo g 10 db/ re f -1 0.4 8 d b start 56 . 000 000 mhz stop 256 . 000 000 mhz cor ch3 s22 1 u fs ce ntr 156 . 0 00 m hz s pan 2 00 . 000 m h z co r 10 jul 2009 10:39:53 1 1: 43 . 275 3. 1289 3 . 19 22 nh 156 . 000 000 mhz 1 2 3 4 1 : 0 . 0 000 db 0 . 00 0 000 m h z ma x ref=1 ch2 markers b w : 22 . 54 85 81 mh z ce nt : 156 . 0 12 593 mh z q : 6 . 91 90 1_ loss : -9 . 979 2 db 1 1 : 4 4 . 238 1 0 . 535 10 . 74 8 nh 156 . 000 000 mhz sf21 57 a 1 d b bw full full
www.rfm.com e-mail: info@rfm.com page 3 of 5 ?2009 by rf monolithics, inc. SF2157A - 7/10/09 filter passband vswr ch1 s1 1 sw r 1 / ref -1 c en ter 156 . 0 00 00 0 mh z spa n 4 0 . 000 0 00 mh z c ch3 s2 2 sw r 1 / ref -2 c 10 jul 20 09 10:38:25 1 2 3 4 4 : 2 . 653 0 17 6 . 000 000 mhz ch1 markers 1: 1. 1732 156 . 000 mhz 2: 1. 2604 166 . 000 mhz 3: 1. 2529 146 . 000 mhz 1 2 3 4 4 : 2 . 803 5 17 6 . 000 000 mhz ch3 markers 1: 1. 2930 156 . 000 mhz 2: 1. 0149 166 . 000 mhz 3: 1. 4610 146 . 000 mhz sf2 157a vswr full
www.rfm.com e-mail: info@rfm.com page 4 of 5 ?2009 by rf monolithics, inc. SF2157A - 7/10/09 filter amplitude and group delay ripple
ch1 s2 1 log 1 d b/ r ef -1 0.4 2 d b center 1 56 . 00 0 000 m hz sp an 40 . 00 0 000 m hz c c h3 s2 1 del 1 00 ns/ ref 1.1 84 us c sm o 10 jul 2009 10:45:36 1 2 3 3 : . 326 40 db -20 . 00 0 0 00 m hz ref=2 ch1 markers me an : -1 0 . 3 53 db s . de v : . 19 270 db p-p : . 7 17 70 db 1 2 3 3 : -12 . 970 ns -20 . 000 000 mhz ref=2 ch3 markers mean : 1. 2027 us s . de v : 4 . 4047 ns p-p : 26 . 24 5 ns sf2 157a ri pple full
www.rfm.com e-mail: info@rfm.com page 5 of 5 ?2009 by rf monolithics, inc. SF2157A - 7/10/09 sm13365-12 case case dimensions electrical connections dimension mm inches min nom max min nom max a 13.08 13.31 13.60 0.515 0.524 0.535 b 6.27 6.50 6.80 0.247 0.256 0.268 c 1.91 2.00 0.075 0.079 d 1.50 0.059 e 0.79 0.031 h 1.0 0.039 p 2.54 0.100 connection term inals input 11 output 5 case ground all others 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 12-terminal ceramic surface-mount case 13.3 x 6.5 mm nominal footprint
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