www.rfm.com e-mail: info@rfm.com page 1 of 5 ?2009 by rf monolithics, inc. SF2145B - 7/9/09 electrical characteristics characteristic sym notes min typ max units center frequency f c 1 895 mhz source impedance, single ended 50 ? load impedance, single ended 50 ? 1 db bandwidth 18 mhz insertion loss, 894 to 895.5 mhz il 8.5 9.0 db insertion loss variation: any point within 894 to 895.5 mhz measured at a constant temperature with the rf input level varying from +10 to +20 dbm 0.3 ? db amplitude ripple, 894 to 895.5 mhz .35 .75 db average group delay, 894 to 895.5 mhz 804 814 824 ns group delay variation, 894.0 to 895.5 mhz 10 25 ns p-p input / output return loss at f c 10 15 db temperature coefficient -18 ppm/k case style smp-03 7.0 x 5.0 mm nominal footprint lid symbolization (yy=year, ww=week) see note 4 rfm SF2145B yyww smp-03 895 mhz saw filter SF2145B 1. unless noted otherwise, all specifications apply over the operating tem- perature range with filter soldered to the specified demonstration board with impedance matching to 50 ? and measured with 50 ? network ana- lyzer. 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 dependent on pcb layout and external impedance matching design. see application note no. 42 for details. 4. "lrip" or "l" after the part number indicates "low rate initial production" and "eng" or "e" indicates "engineering prototypes." 5. the design, manufacturing process, and specifications of this filter are subject to change. 6. 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. 7. us and international patents may apply. 8. rfm, stylized rfm logo, and rf monolithics, inc., are registered trademarks of rf monolithics, inc. caution: electrostatic sensitive device. observe precautions for handling. notes: ? saw filter, 895 mhz, 15 mhz bw 7.0 x 5.0 mm 10 pin surface-mount case complies with directive 2002/95/ec (rohs) absolute maximum ratings rating value units maximum incident power in passband +20 dbm maximum dc voltage between any two terminals 0 vdc operating temperature range -20 to +70 c pb
www.rfm.com e-mail: info@rfm.com page 2 of 5 ?2009 by rf monolithics, inc. SF2145B - 7/9/09 tesing environment ch1 s11 1 u fs centr 899 . 700 mhz span 50 . 000 mhz cor prm ch2 s21 log 1 db/ ref -10 db center 899 . 700 000 mhz span 50 . 000 000 mhz cor prm ch3 s22 1 u fs centr 899 . 700 mhz span 50 . 000 mhz cor 18 feb 2008 13:27:10 1 1 : 60 . 025 -1 . 6348 108 . 21 pf 899 . 700 000 mhz 1 2 3 4 1 : 0 . 0000 db 0 . 000 000 mhz max ref=1 ch2 markers bw : 26 . 232706 mhz cent : 900 . 034584 mhz q: 34 . 310 1_ loss : -7 . 7333 db 1 1 : 55 . 941 -5 . 0742 34 . 862 pf 899 . 700 000 mhz SF2145B demo device # 49 full full 3 8 note: unmatched filter to 50 ? input / output.
www.rfm.com e-mail: info@rfm.com page 3 of 5 ?2009 by rf monolithics, inc. SF2145B - 7/9/09 ch1 s21 del 100 ns/ ref 800 ns cor smo prm ch2 s21 log 1 db/ ref -10 db ch2 center 899 . 700 000 mhz span 50 . 000 000 mhz cor prm 18 feb 2008 13:26:55 1 2 2 : 667 . 57 ps 1 . 500 000 mhz ref=1 ch1 markers mean : 812 . 88 ns s . dev : 1. 2799 ns p-p : 4 . 4631 ns 1 2 2 : . 11980 db 1 . 500 000 mhz ref=1 ch2 markers mean : -8 . 0196 db s . dev : . 06000 db p-p : . 24780 db SF2145B demo device # 49 resp resp
www.rfm.com e-mail: info@rfm.com page 4 of 5 ?2009 by rf monolithics, inc. SF2145B - 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 carrier tape dimensions ao 5.5 mm bo 7.5 mm ko 2.0 mm pitch 8.0 mm w 16.0 mm 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
www.rfm.com e-mail: info@rfm.com page 5 of 5 ?2009 by rf monolithics, inc. SF2145B - 7/9/09 smp-03 case recommended pcb 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 .47 0.60 .73 0.019 0.024 0.029 e 2.41 2.54 2.67 0.095 0.100 0.105 h 0.87 1.0 1.13 0.034 0.039 0.044 j 4.87 5.00 5.13 0.192 0.197 0.202 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 electrical connections connection terminals input (port 1) 3 output (port 2) 8 case ground 2, 4, 7, 9 to be grounded 1, 2, 4, 5, 6, 7, 9, 10 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 a b c h e p d h j k 10-terminal ceramic surface-mount case 7 x 5 mm nominal footprint
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