www.rfm.com e-mail: info@rfm.com page 1 of 4 ?2010 by rf monolithics, inc. SF2218D - 7/27/10 electrical characteristics characteristic sym notes min typ max units nominal center frequency f c 1 425 mhz insertion loss, 425 mhz il 1 5.0 db 3 db bandwidth bw 3db 10 19 mhz passband amplitude ripple, 420 to 430 mhz 1 1.0 2.1 db p-p attenuation referenced to 0 db: 275 to 300 mhz 245 db 299 to 335 mhz 240 334 to 360 mhz 245 359 to 385 mhz 235 386 to 400 mhz 220 400 to 410 mhz 240 455 to 484 mhz 220 485 to 494 mhz 235 495 to 575 mhz 240 single-ended source impedance 50 ohm balanced load impedance 100 ohm operating temperature range -20 +70 c case style sm3838-8 3.8 x 3.8 mm nominal footprint lid symbolization (y=year, ww=week, s=shift) rfm 956 ywws 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. rejection is measured as attenuation referenced to 0 db. rejection in final user application is dependent on pcb layout and e xternal impedance matching design. see application note no. 42 for details. 3. the design, manufacturing process, and specifications of this filter are subject to change. 4. tape and reel standard ansi / eia 481. 5. 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. 6. us and international patents may apply. 7. rfm, stylized rfm logo, and rf monolithics, inc. are registered trademarks of rf monolithics, inc. ? low insertion loss 3.8 x 3.8 mm surface-mount case single-ended input and differential output complies with directive 2002/95/ec (rohs) absolute maximum ratings rating value units maximum incident power in passband +10 dbm maximum dc voltage on any non-ground terminal 3 vdc storage temperature range in tape and reel -40 to +85 c suitable for lead-free soldering - maximum soldering temperature 260c for 30 s 425 mhz saw filter SF2218D pb caution: electrostatic sensitive device. observe precautions for handling. notes: preliminary sm3838-8
www.rfm.com e-mail: info@rfm.com page 2 of 4 ?2010 by rf monolithics, inc. SF2218D - 7/27/10 SF2218D frequency response
SF2218D measurement circuit ch1 s2 1 log 1 db/ r ef -3. 283 d b centr 425 . 000 mhz span 30 . 000 mhz cor ch2 s2 1 log 10 db/ ref -1 .743 db center 425 . 000 0 00 m hz sp an 150 . 000 000 mhz cor ch 3 s21 log 1 db/ ref 0 db cen tr 425 . 000 m hz span 30 . 000 mhz co r 22 jul 2 010 10:06:01 1 2 3 3 : - . 53720 db 10 . 0 00 0 00 mh z ref=2 ch 1 markers m ean : -3 . 71 04 db s . de v : . 25 930 d b p- p : 1 . 090 7 db 1 2 3 4 5 5 : -49 . 2 79 d b 500 . 000 000 mhz ch 2 mar ke rs 1:-49 . 021 db 350 . 000 mhz 2:-44 . 140 db 395 . 005 mhz 3:-40 . 533 db 455 . 000 mhz 4:-50 . 169 db 485 . 000 mhz 1 2 3 4 1 : 0 . 0000 db 0 . 0 00 0 00 mh z ref=1 ch 3 mar ke rs bw : 1 9 . 3 08118 mhz cent : 426 . 7649 62 mhz q : 22 . 1 03 1_ loss : -3 . 9080 db SF2218D new d esign test f ixtu re resp resp
www.rfm.com e-mail: info@rfm.com page 3 of 4 ?2010 by rf monolithics, inc. SF2218D - 7/27/10 8-terminal ceramic surface-mount case 3.8 x 3.8 mm nominal footprint sm3838-8 case top view bottom view 0.066 0.055 typ. (1.68) (1.40) 0 . 0 2 9 t y p . ( o . 7 4 ) 0 . 0 5 0 t y p . ( 1 . 2 7 ) 0 . 0 0 2 ( 0 . 0 5 ) 0 . 0 9 0 ( 2 . 2 9 ) 0 . 0 3 3 ( 0 . 8 4 ) pcb footprint case dimensions dimension mm inches min nom max min nom max a 3.6 3.8 4.0 0.142 0.150 0.157 b 3.6 3.8 4.0 0.142 0.150 0.157 c 1.05 1.20 1.35 0.041 0.047 0.053 d 0.95 1.10 1.25 0.037 0.043 0.049 e 0.90 1.00 1.10 0.035 0.040 0.043 f 0.50 0.60 0.70 0.020 0.024 0.028 g 2.39 2.54 2.69 0.090 0.100 0.110 h 1.40 1.75 2.05 0.055 0.069 0.080 electrical connections connection terminals port 1 single-ended input 2 port 2 balanced output 5, 7 ground all others dot indicates pin 1 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 1 2 3 b 7 6 5 4 c h 7 6 5 4 e f g 1 2 3 8 8 d 956 yyww
www.rfm.com e-mail: info@rfm.com page 4 of 4 ?2010 by rf monolithics, inc. SF2218D - 7/27/10 tape and reel specifications ?b? nominal size quantity per reel inches millimeters 7 178 500 pcs 13 330 3,000 pcs component orientation see detail "a" 1 3 . 0 2 0 . 2 2.0 12.0 1 0 0 r e f . " b " r e f . detail ?a?
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