? rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 1 of 2 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. RF1295C-071904 electrical characteristics characteristic sym notes minimum typical maximum units center frequency at 25c nominal frequency f nom 1, 3, 4, 5 451.35 mhz insertion loss il 3, 6 2.5 5.0 db 3 db bandwidth passband bw 3 2, 3, 6 700 1000 khz rejection at f c - 21.4 mhz (image) 3 35 45 db at f c - 10.7 mhz (lo) 15 30 ultimate 80 temperature operating case temperature t c 2, 6 -40 +85 c turnover temperature t o 15 25 40 c turnover frequency f o f nom mhz frequency temperature coefficent ftc 0.032 ppm/c 2 frequency aging absolute value during the 1 st year |fa| 2 <10 ppm/yr external impedance series inductance l 6 27 nh shunt capacitance c 1 6 5.6 pf shunt capacitance c 2 6 8.2 pf lid symbolization (y=year, ww=week, d=day of week) 482 // ywws standard reel quantity reel size 7 inch 9 500 pieces/reel reel size 13 inch 3000 pieces/reel ? ideal front-end filter for 451.35 mhz wireless receivers ? low-loss coupled-resonator quartz design ? simple external impedance matching ? complies with directive 2002/95/ec (rohs) the RF1295C is a low-loss, compact, and economical surface acoustic wave (saw) filter designed to pro- vide front-end selectivity in 451.35mhz receivers. recevier 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 operating in europe under etsi i-ets 300 220. 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 advanced saw design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching (not included). 451.35 mhz saw filter RF1295C 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 bandwidth are dependent on the imped- ance 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. typ- ically, 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. 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. 9. tape and reel standard per ansi / eia 481. pb
451.35 mhz saw filter rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-9148 e-mail: info@rfm.com page 2 of 2 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. RF1295C-071904 absolute maximum ratings rating value units input power level 10 dbm dc voltage 12 vdc storage temperature -40 to +85 c soldering temperature (10 seconds / 5 cycles max.) 260 c pin connection 1 input 2 input return 3 ground 4 case ground 5 output 6 output return 7 ground 8 case ground matching circuit to 50 w w electrical connections a 1 2 3 b 7 6 5 4 c d 7 6 5 4 e f g 1 2 3 8 8 dimension mm inches min nom max min nom max a 4.8 5.0 5.2 0.189 0.197 0.205 b 4.8 5.0 5.2 0.189 0.197 0.205 c 1.3 1.5 1.7 0.050 0.060 0.067 d 1.98 2.08 2.18 0.078 0.086 e 1.07 1.17 1.27 0.042 0.046 0.050 f 0.50 0.64 0.70 0.020 0.025 0.028 g 2.39 2.54 2.69 0.094 0.100 0.106 case dimensions 1 2 3 8 input output 7 6 5 4
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