www.rfm.com e-mail: info@rfm.com page 1 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 electrical characteristics characteristic sym notes min typ max units center frequency f c 1 69.5 70.0 70.5 mhz minimum insertion loss il min 1 10.6 11.0 db 1 db bandwidth bw 1 18.1 10.2 mhz 3 db bandwidth bw 3 1 9.1 10.7 mhz 30 db bandwidth bw 30 1 12.35 13.20 mhz attenuation referenced to il min: 50 to 62.5 mhz 3 38 40 db 62.5 to 63 mhz 3 34 40 77 to 77.5 mhz 3 26 33.5 77.5 to 90 mhz 3 35 38 passband ripple, f c 3.0 mhz 1, 2, 3 0.65 1.0 db p-p phase ripple, f c 4.5 mhz 12.5 20 deg group delay ripple, f c 4.5 mhz 170 200 ns p-p operating temperature 1 -20 +80 c balanced source impedance 50 ohm balanced load impedance 50 ohm frequency temperature coefficient -94 ppm/c impedance matching to 50 ? external source/load l-c networks case style sm13365-12 13.3 x 6.5 mm nominal footprint lid symbolization (yy = year, ww = week) rfm sf2185a1 yyww ? precision if saw filter balanced 50 ohm operation 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 260c for 30 s 70.00 mhz saw filter SF2185A-1 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: preliminary
www.rfm.com e-mail: info@rfm.com page 2 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 SF2185A-1 filter response SF2185A-1 passband amplitude and group delay ripple
www.rfm.com e-mail: info@rfm.com page 3 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 SF2185A-1 balanced input impedance SF2185A-1 balanced output impedance
www.rfm.com e-mail: info@rfm.com page 4 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 pcb pad layout SF2185A-1 balanced tuning component values
www.rfm.com e-mail: info@rfm.com page 5 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 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 6 of 6 ?2009 by rf monolithics, inc. SF2185A-1 - 7/1/09 tape and reel details
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