? rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 1 of 3 rfm europe phone: 44 1963 251383 fax: 44 1963 251510 http://www.rfm.com ?1999 by rf monolithics, inc. the stylized rfm logo are registered trademarks of rf monolithics, inc. RF1211C-090503 electrical characteristics item minimum typical maximum note center frequency @ 25c f c (mhz) - 315 - 1, 2 minimum i.l. (314.82~315.22 mhz) (db) il min - 1.8 5.0 1 pass band (relative to il min ) 314.77~315.2 mhz (db) - 1.5 3.0 1 314.71~315.26 mhz (db) - 2.0 6.0 pass bandwidth (relative to il min ) bw 3 (khz) 800 900 - 1 attenuation: (relative to il min ) (db) 1 10~270 mhz (db) 45 55 - 270~309 mhz (db) 30 35 - 309~313.94 mhz (db) 15 20 - 316~335 mhz (db) 10 15 - 335~400 mhz (db) 35 42 - 400~1000 mhz (db) 45 60 - impedance at f c ; input z in =r in //c in 344 w // 4.9 pf 1 output z out =r out //c out 344 w // 4.9 pf turnover to (deg.c) 25 typ. 3, 4 frequency aging absolute value during the first year 10 ppm/yr typical lid symbolization (in addition to lot and/or date codes) 410 ywws standard reel quantity reel size 7 inch 500 pieces/reel reel size 13 inch 3000 pieces/reel ? ideal front-end filter for domestic wireless receivers ? low-loss, coupled-resonator quartz design ? simple external impedance matching ? complies with directive 2002/95/ec (rohs) the RF1211C is a low-loss, compact, and economical surface-acoustic-wave (saw) filter designed to pro- vide front-end selectivity in 315.0 mhz receivers. receiver designs using this filter include superhet with 10.7mhz or 500khz if, direct conversion and superregen. typical applications of these receivers are wire- less remote-control and security devices (especially for automotive keyless entry) operating in the usa under fcc part 15, in canada under rss-210, and in italy this coupled-resonator filter (crf) uses selective null placement to provide suppression, typically greater than 40db, of the lo and image spurious responses of superhet receivers with 10.7mhz if. rfm?s ad- vanced saw design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching. 315.0 mhz saw filter RF1211C sm5050-8 case 5 x 5 caution: electrostatic sensitive device. observe precautions for handling. notes: 1. unless noted otherwise, all measurements are made with the filter installed in the specified test fixture which is connected to a 50 w test system with vswr 1.2:1. the test fixture l and c are adjusted for minimum insertion loss at the filter center frequency, f c . note that insertion loss and band- width and passband shape are dependent on the impedance matching component values and quality. 2. the frequency f c is defined as the midpoint between the 3db frequencies. 3. where noted specifications apply over the entire specified operating temperature range. 4. the turnover temperature, t o , is the temperature of maximum (or turnover) frequency, f o . the nominal frequency at any case temperature, t c , may be calculated from: f=f o [1-ftc(t o -t c ) 2 ]. 5. frequency aging is the change in fc with time and is specified at +65c or less. aging may exceed the specification for prolonge d temperatures above +65c. typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years. 6. the design, manufacturing process, and specifications of this device are subject to change without notice. 7. one or more of the following u.s. patents apply: 4,54,488, 4,616,197, and others pending. 8. all equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. pb
315.0 mhz saw filter rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 2 of 3 rfm europe phone: 44 1963 251383 fax: 44 1963 251510 http://www.rfm.com ?1999 by rf monolithics, inc. the stylized rfm logo are registered trademarks of rf monolithics, inc. RF1211C-090503 frequency characteristics: ch1 s 21 log mag 1 db/ ref -5 db start 314.000 000 mhz stop 316.000 000 mhz cor hld prm 10 dec 2002 09:53:46 1 2 3 4 1_: 0 db 0.000 000 mhz max ref=1 bw: .952 466 mhz cent: 314.970538 mhz q: 330.69 1_ loss: -2.1279 db ch1 s 21 log mag 10 db/ ref 0 db center 315.000 000 mhz span 50.000 000 mhz cor hld prm 10 dec 2002 10:26:15 1 2 3 4 1_: 0 db 0.000 000 mhz max ref=1 bw: .950 662 mhz cent: 314.971399 mhz q: 331.32 1_ loss: -2.1413 db
315.0 mhz saw filter rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 3 of 3 rfm europe phone: 44 1963 251383 fax: 44 1963 251510 http://www.rfm.com ?1999 by rf monolithics, inc. the stylized rfm logo are registered trademarks of rf monolithics, inc. RF1211C-090503 a 1 2 3 b 7 6 5 4 c d 7 6 5 4 e f g 1 2 3 8 8 absolute maximum ratings rating value units input power level 10 dbm dc voltage 12 vdc storage temperature 5 -40 to +85 c soldering temperature (10 seconds / 5 cycles max.) 260 c pin connection 1 input 2 input ground 3 to be grounded 4 case ground 5 output 6 output ground 7 to be grounded 8 case ground matching circuit to 50 w w electrical connections dimension mm inches min nom max min nom max a 4.8 5.0 5.2 0.1968 b 4.8 5.0 5.2 0.1968 c 1.7 0.0669 d 2.08 0.0818 e 1.17 0.046 f 0.64 0.0252 g 2.39 2.54 2.69 0.100 case dimensions 1 2 3 8 input output 7 6 5 4 10pf 47nh 12pf 56nh
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