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www.rfm.com e-mail: info@rfm.com page 1 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 electrical characteristics characteristic sym notes min typ max units nominal center frequency f c 1 140 mhz insertion loss il max 189db insertion loss variation over temperature 1 1 db 3 db bandwidth 12227 mhz passband amplitude ripple, matching network a, 129 to 151 mhz 1 0.8 1.2 db p-p passband amplitude ripple, matching network b, 129 to 151 mhz 1 0.6 1.0 db p-p passband amplitude ripple, matching network c or d, 130 to 150 mhz 0.9 1.0 db p-p absolute attenuation (referenced to il max ) 10 to 116 mhz 33540 db 165 to 700 mhz 33540 db absolute group delay in passband 1 300 350 ns passband group delay ripple, matching network a or b, 129 to 151 mhz 1 40 80 ns p-p input impedance, unbalanced matching network 1 50 ohm input impedance, balanced matching network 1 200 ohm input return loss through any matching network 1 6 14 db output impedance, unbalanced matching network 1 50 ohm output impedance, balanced matching network 1 200 ohm output return loss through any matching network 1 6 14 db operating temperature range -40 +85 c case style sm3838-8 3.8 x 3.8 mm nominal footprint lid symbolization (y=year, ww=week, s=shift) rfm 872 ywws sm3838-8 ? 22 mhz filter bandwidth 3.8 x 3.8 x 1.4 mm surface-mount package 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 3 vdc storage temperature range in tape and reel -40 to +85 c suitable for lead-free soldering - maximum soldering profile 260c for 30 s 140 mhz saw filter SF2181D 1. unless noted otherwise, all specifications apply over the operating temper- ature range with filter soldered to the specified demonstration 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 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. pb caution: electrostatic sensitive device. observe precautions for handling. notes:
www.rfm.com e-mail: info@rfm.com page 2 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 SF2181D, using matching network a ch1 s11 1 u fs centr 140 . 000 mhz span 120 . 000 mhz cor ch2 s21 lo g 10 db/ re f -9 db center 140 . 0 00 00 0 mhz span 1 20 . 00 0 000 m hz cor ch3 s22 1 u fs centr 14 0 . 0 00 m hz span 1 20 . 00 0 mhz cor 25 ma r 2009 14 :5 7:42 1 1: 39 .156 13 . 82 4 15 . 716 nh 140 . 000 000 mhz 1 2 3 4 1 : 0 . 0000 db 0 . 000 000 mhz max ref=1 ch 2 m ar k er s bw : 27 . 8 427 21 mhz cent : 139 . 796687 mhz q: 5 . 0 209 1_ loss : -8 . 0949 db ch2 pass 1 1: 36 . 951 10 . 041 11 . 4 15 nh 1 40 . 00 0 000 m h z sf2 181d sb an d bs full full ch2 s2 1 lo g 10 d b/ re f -9 db start 10 . 000 000 mhz stop 1 000 . 000 000 mhz 25 mar 2009 15:11:22 1 2 3 4 4 : -11 . 35 8 db 1 53 . 7 09 559 m hz ch2 markers 1:-8 .6923 db 12 8 . 800 m hz 2 : -51 . 908 d b 11 6 . 000 m hz 3 : -49 . 108 d b 16 6 . 000 m hz ch2 pass
www.rfm.com e-mail: info@rfm.com page 3 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 ch 1 s11 log 5 db / ref -8 db c ch 3 s22 log 5 db / ref -1 0 d b c en te r 1 40 . 00 0 000 m h z s pan 40 . 0 00 00 0 mh z c 25 mar 2009 15:01:36 1 1 : -14 . 18 4 db 140 . 0 00 00 0 mh z 1 1 : -14 . 52 4 db 140 . 0 00 00 0 mh z SF2181D sb and bs return loss ful l ch1 s2 1 del 50 ns/ re f 400 n s center 140 . 0 00 00 0 mhz span 40 . 0 00 00 0 mhz c sm o ch3 s21 log 1 db/ ref -8.884 db c 25 ma r 2 00 9 15: 00 :32 1 2 3 3 : 21 . 791 ns -22 . 000 000 mhz ref = 2 ch1 markers me an : 3 14 . 06 n s s . dev : 6 . 7905 ns p-p : 3 2 . 7 59 n s 1 2 3 3 : 1 . 0845 db -22 . 000 000 mhz ref = 2 ch3 markers mean : -8 . 9407 db s . dev : . 21580 db p-p : 1 . 1 586 d b sf2 181d sb an d bs ri ppl e full SF2181D, using matching network a
www.rfm.com e-mail: info@rfm.com page 4 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 c h 1 s 11 1 u fs c en tr 14 0 . 000 m h z spa n 120 . 0 00 m hz cor ch2 s2 1 lo g 10 db/ r ef -10. 08 d b c en ter 140 . 0 00 00 0 mh z span 1 20 . 00 0 000 m h z cor ch3 s22 1 u fs c entr 14 0 . 000 m h z span 1 20 . 0 00 mh z cor 4 mar 2009 12:08:18 1 1: 54 .145 16 . 40 0 18 . 644 nh 140 . 000 00 0 mhz 1 2 3 4 1: 0. 0000 db 0. 000 000 mhz max re f=1 ch 2 m ar k er s bw : 27 . 937441 mhz cent : 140 . 011470 mhz q: 5 . 0116 1 _ loss : -9 . 1 503 d b ch2 pass 1 1: 46 . 453 -7 . 60 74 149 . 4 4 pf 140 . 000 000 mhz sf21 81d bs full full ch1 s2 1 del 5 0 n s/ ref 400 ns center 1 40 . 00 0 000 m hz sp an 40 . 00 0 000 m hz c smo ch2 s21 log 1 db/ ref -10.08 db c 4 ma r 200 9 12:0 9:57 1 2 3 2 : -16 . 670 ns 22 . 000 000 mhz ref=3 ch1 markers mean : 317 . 60 ns s . de v : 5 . 36 07 ns p-p : 25 . 14 8 ns 1 2 3 3 : - . 33590 db 22 . 000 000 mhz ref=2 ch2 markers me an : -9 . 47 40 db s . de v : . 13 630 db p-p : . 6 24 10 db ch2 pass sf2 181d bs full full SF2181D, using matching network b
www.rfm.com e-mail: info@rfm.com page 5 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 c h 1 s 11 1 u fs centr 140 . 000 mhz span 120 . 000 mhz cor ch2 s2 1 lo g 10 db/ re f -10.0 8 d b c en ter 140 . 0 00 00 0 mh z span 1 20 . 00 0 000 m h z cor ch3 s22 1 u fs centr 140 . 000 mhz span 120 . 000 mhz cor 3 mar 20 09 16 :28:17 1 1: 37 .842 13 . 59 6 15 . 456 nh 140 . 0 00 00 0 mh z 1 2 3 4 1: 0. 0000 db 0. 000 000 mhz max ref=1 ch 2 m ar ker s bw : 28 . 0 388 90 mhz cen t : 13 9 . 828 48 5 m hz q: 4 . 9869 1_ loss : -7 . 6651 db ch2 pass 1 1 : 46 . 906 -3 . 83 20 296 . 66 pf 140 . 000 000 mhz sf2 181d ss tuning2 full full SF2181D, using matching network c c h1 s2 1 d el 50 ns/ re f 400 n s c sm o ch3 s2 1 lo g 1 d b/ re f -8 db center 140 . 000 000 mhz span 40 . 000 000 mhz c 3 mar 2009 16:29:11 1 2 3 2 : -2 0 . 86 6 ns 2 2 . 000 0 00 m hz ref = 3 ch1 markers me an : 3 16 . 34 n s s . dev : 7 . 2850 ns p-p : 3 7 . 1 07 n s 1 2 3 3 : - . 79690 db 22 . 000 000 mhz ref = 2 ch3 markers mean : -8 . 2446 db s . dev : . 18590 db p-p : . 93 510 d b sf2 181d ss tu ning2 full
www.rfm.com e-mail: info@rfm.com page 6 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 ch 1 s 11 s wr 1 / ref 2 62.1 n c ch3 s22 swr 1 / ref -2 center 14 0 . 000 0 00 m hz spa n 4 0 . 000 0 00 m hz c 3 mar 2009 16:30:1 6 1 1 : 1. 5009 140 . 000 000 mhz 1 1 : 1. 1102 140 . 000 000 mhz sf2181 d ss tuning2 ful l SF2181D, using matching network c
www.rfm.com e-mail: info@rfm.com page 7 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 SF2181D, using matching network d ch1 s11 1 u fs cen tr 14 0 . 000 m h z spa n 120 . 0 00 m hz cor ch2 s2 1 lo g 10 db/ re f -10.0 8 d b c en t er 140 . 0 00 00 0 mh z span 1 20 . 00 0 000 m h z cor ch3 s22 1 u fs centr 140 . 000 mhz span 120 . 000 mhz cor 2 mar 2009 16:31:45 1 1: 53 .998 14 . 09 4 16 . 022 nh 140 . 0 00 00 0 mh z 1 2 3 4 1 : 0 . 0000 db 0 . 000 000 mhz max ref=1 ch 2 m ar ker s bw : 27 . 7 849 17 mh z cent : 139 . 939260 mhz q: 5 . 0365 1 _ loss : -9 . 99 63 db ch2 pass 1 1: 44 . 178 11 . 346 12 . 8 98 nh 140 . 000 000 mhz sf2 181d scalebb full full c h1 s2 1 d el 50 ns/ re f 400 n s c smo ch3 s2 1 lo g 2 d b/ re f -8 db center 140 . 000 000 mhz span 40 . 000 000 mhz c 2 mar 2009 16:36:13 1 2 3 2 : -1 5 . 71 7 ns 2 2 . 000 0 00 m hz ref = 3 ch1 markers me an : 3 15 . 12 n s s . dev : 5 . 0503 ns p-p : 2 2 . 0 30 n s 1 2 3 3 : - . 68400 db 22 . 000 000 mhz ref = 2 ch3 markers m ean : -10 . 458 d b s . dev : . 16230 db p-p : . 73 120 d b balance t o balan ce full
www.rfm.com e-mail: info@rfm.com page 8 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 SF2181D, matching network b, two options SF2181D, matching network a, two options
www.rfm.com e-mail: info@rfm.com page 9 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 SF2181D, matching network c SF2181D, matching network d
www.rfm.com e-mail: info@rfm.com page 10 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10

8-terminal ceramic surface-mount case 3.8 x 3.8 mm nominal footprint sm3838-8 case top view bottom view pcb footprint for 180 degree rotation option
www.rfm.com e-mail: info@rfm.com page 11 of 11 ?2009-2010 by rf monolithics, inc. SF2181D - 2/16/10 tape and reel specifications ?b ? nominal size quantity per reel inches millimeters 7 178 1000 13 330 3000 see detail "a" 1 3 . 0 2 0 . 2 2.0 12.0 1 0 0 r e f . " b " r e f . component orientation and dimensions carrier tape dimensions ao 4.25 mm bo 4.25 mm ko 1.30 mm pitch 8.0 mm w12.0 mm ro.3 (max.) ko section a-a 0.3 0.05 section b-b bo 2.0 4.0 ao pitch bb a r0.5 (max.) a 5 . 5 1 2 . 0 1 . 7 5 1.5 1.50 pin #1 user direction of feed

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