303.825 mhz saw filter phone: +86 10 6301 4184 fax: +86 10 6301 9167 email: sales@vanlong.com web: http://www.va nlong.com ? april 2004 by vanlong technology co., ltd. SF303 ? designed to provide front-end selectivity in 303.825 mhz ? low-loss, coupled-resonator quartz design ? simple external impedance matching ? rugged, hermetic, low profile to-39 package absolute maximum rating (ta=25 c) parameter rating unit cw rf power dissipation p +10 dbm dc voltage v dc between any two pins v dc 30 v operating temperature range t a -10 ~ +60 c storage temperature range t stg -40 ~ +85 c electronic characteristics parameter sym minimum typical maximum unit nominal frequency (at 25 c) (center frequency between 3db point) f c ns 303.825 ns mhz insertion loss il - 3.0 4.5 db 3db passband bw 3 - 600 800 khz at f c - 21.4 mhz (image) - 40 50 - db at f c - 10.7 mhz (lo) - 20 30 - db rejection ultimate - - 60 - db operating temperature range t c -10 - +60 c turnover temperature t o 25 - 55 c turnover frequency f o - f c - mhz temperature stability frequency temperature coefficient ftc - 0.032 - ppm/c 2 frequency aging absolute value during the first year |f a | - - 10 ppm/yr dc insulation resistance between any two pins - 1.0 - - m ? ns = not specified notes: 1. the frequency f c is defined as the midpoint between the 3db frequencies. 2. unless noted otherwise, all measurements are made with the filter installed in the specified test fixture that is connected to a 50 ? 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, bandwidth, and passband shape are dependent on the impedance matching component values and quality. 3. unless noted otherwise, specifications apply over the entire specified operating temperature range. 4. frequency aging is the change in f c with time and is specified at +65 c or less. aging may exceed the specification for prolonged temperatures above +65 c. typically, aging is greatest the first year after manufacture, decreasing in subsequent years. 5. turnover temperature, t 0 , is the temperature of maximum (or turnover) frequency, f 0 . the nominal frequency at any case temperature, t c , may be calculated from: f = f 0 [1 - ftc ( t 0 - t c ) 2 ]. 6. the specifications of this device are based on the test circuit shown above and subject to change or obsolescence without notice. 7. all equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. 8. our liability is only assumed for the surface acoustic wave (saw) component(s) per se, not for applications, processes and circuits implemented within components or assemblies. 9. for questions on technology, prices and delivery please contact our sales offices or email to sales@vanlong.com. SF303
303.825 mhz saw filter phone: +86 10 6301 4184 fax: +86 10 6301 9167 email: sales@vanlong.com web: http://www.va nlong.com ? april 2004 by vanlong technology co., ltd. SF303 package dimensions (to-39) marking test circuit typical frequency response electrical connections terminals connection 1 input/output 2 output/input 3 case ground package dimensions dimensions nom. (mm) tol. (mm) a 9.35 0.10 b 3.40 0.10 c 3.00 0.20 d 0.45 0.10 e 5.08 0.10 f 2.54 0.20 g 0.45 c = 15 pf* ls1 = ls2 = 70 nh SF303 303.825 ink marking color: black or blue
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