www.rfm.com e-mail: info@rfm.com page 1 of 5 ?2009 by rf monolithics, inc. sf2185a - 6/11/09 electrical characteristics characteristic sym notes min typ max units center frequency f c 1 69.8 70.0 70.2 mhz minimum insertion loss il min 1 10.6 12.0 db 1 db bandwidth bw 1 19.0 9.7 mhz 3 db bandwidth bw 3 1 9.5 10.0 mhz 35 db bandwidth bw 35 1 11.7 13.0 mhz attenuation referenced to il min 10 to 63 mhz 3 40 45 db 78 to 140 mhz 3 40 45 db passband ripple, f c 4.0 mhz 1, 2, 3 0.6 1.0 db p-p group delay ripple, f c 4.0 mhz 80 160 ns p-p operating temperature 1 -20 +80 c source impedance 50 ohm load impedance 50 ohm frequency temperature coefficient -94 ppm/c impedance matching to 50 ? external source/load l case style sm13365-12 13.3 x 6.5 mm nominal footprint lid symbolization (yy = year, ww = week) rfm sf2185a yyww ? precision if saw 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 in tape and reel -40 to +85 c suitable for lead-free soldering - maximum soldering profile 260 c for 30 s 70.00 mhz saw filter sf2185a 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 depe ndent 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: preliminary
www.rfm.com e-mail: info@rfm.com page 2 of 5 ?2009 by rf monolithics, inc. sf2185a - 6/11/09 sf2185a filter response sf2185a passband amplitude and group delay ripple ch1 s2 1 lo g 10 db/ re f -60 d b center 70 . 000 000 mhz span 50 . 000 000 mhz cor 29 ja n 20 09 14 :3 8:36 1 2 3 4 1 : 0 . 0000 db 0 . 000 000 mhz max ref=1 ch 1 m ar ker s bw : 9 . 1 042 59 mhz cent : 70 . 017709 mhz q: 7 . 6 907 1 _ l oss : -1 0 . 5 92 db ch1 pass sf2 185a full ch1 s21 del 50 ns/ ref 1.6 us c smo ch2 s 21 l og 1 db/ r ef - 10 .74 db start 6 5 . 000 0 00 m hz stop 7 5 . 000 0 00 m hz c 2 9 jan 20 09 1 4:41:4 0 1 2 3 2 : 34 . 33 2 ns 7 . 4 00 0 00 mh z re f= 3 ch1 markers me an : 1 . 6 42 8 u s s . dev : 11 . 132 ns p-p : 5 7 . 4 49 ns ch1 pass 1 2 3 2 : - . 16 420 d b 7 . 4 00 0 00 mh z re f= 3 ch2 markers m ean : -11 . 001 d b s . d ev : . 1 970 0 d b p-p : . 85 240 db sf21 85 a full full
www.rfm.com e-mail: info@rfm.com page 3 of 5 ?2009 by rf monolithics, inc. sf2185a - 6/11/09 tuning component values pcb pad layout
www.rfm.com e-mail: info@rfm.com page 4 of 5 ?2009 by rf monolithics, inc. sf2185a - 6/11/09 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 k output e 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
www.rfm.com e-mail: info@rfm.com page 5 of 5 ?2009 by rf monolithics, inc. sf2185a - 6/11/09 tape and reel details
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