www.rfm.com e-mail: info@rfm.com page 1 of 2 ?2008 by rf monolithics, inc. RF1391C - 3/21/08 electrical characteristics characteristic sym notes minimum typical maximu m units center frequency at 25c absolute frequency f c 1, 2 433.42 mhz tolerance from 433.42 mhz d f c -120/+200 khz insertion loss il 1 3.0 5.0 db 3 db bandwidth bw 3 1, 2 500 600 750 khz rejection at f c - 21.4 mhz (image) 1 40 50 db at f c - 10.7 mhz (lo) 30 40 ultimate 80 temperature operating case temp. t c 3, 4 -40 +85 c turnover temperature t o 15 25 35 c turnover frequency f o f c mhz freq. temp. coefficient ftc 0.032 ppm/c 2 frequency aging absolute value during the first year |fa| 5 10 ppm/yr impedance @ fc input z in = r in //c in z in 1 212 w // 3.1 pf output z out = r out //c out z out 212 w // 3.1 pf lid symbolization (y=year ww=week s=shift) 415 ywws standard reel quantity 7 inch reel 500 pieces/reel standard reel quantity 13 inch reel 3000 pieces/reel ? ideal front-end filter for wireless receivers ? low-loss, coupled-resonator quartz design ? simple external impedance matching ? complies with directive 2002/95/ec (rohs) the RF1391C is a low-loss, compact, and economical surface-acoustic-wave (saw) filter designed to provide front-end selectivity in 433.42 mhz receivers. receiver designs using this filter include superhet with 10.7 mhz or 500 khz if, direct conversion and superregen. typical applications of these receivers are wireless 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 40 db, of the lo and image spurious responses of superhet receivers with 10.7 mhz if. rfms advanced saw design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching. 433.42 mhz saw filter RF1391C 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 prolo nged 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 sa le. pb
www.rfm.com e-mail: info@rfm.com page 2 of 2 ?2008 by rf monolithics, inc. RF1391C - 3/21/08 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 ground 2 input 3 to be grounded 4 case ground 5 output 6 output ground 7 to be grounded 8 case ground matching circuit to 50 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 1.7 0.067 d 2.08 0.082 e 1.17 0.046 f 0.64 0.025 g 2.39 2.54 2.69 0.094 0.100 0.106 case dimensions pin connection 1 input 2 input ground 3 ground 4 case ground 5 output ground 6output 7 ground 8 case ground optional 1 2 3 8 7 6 5 4 input 33 nh 4.3 pf output 4.3 pf 33 nh 1 2 3 8 input output c=4.3 pf l=33 nh 7 6 5 4 c=4.3 pf l=33 nh
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