218.50 mhz saw filter phone: +86 (10) 5820-3910 fax: +86 (10) 5820-3915 email: sales@vanlong.com web: http://www. vanlong.com ? 2007 by vanlong technology co., ltd. SF218 ? ideal for use in 218.50 mhz ? low-loss, coupled-resonator quartz design ? simple external impedance matching ? rugged, hermetic, low profile to-39 package ? complies with directive 2002/95/ec (rohs compliant) 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 218.50 ns mhz insertion loss il - 3.5 4.5 db 3db passband bw 3 2.0 - 3.0 mhz passband ripple ? - - 1.5 db ultimate rejection ( f c 4.0mhz) rel 35 - - db 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. the specifications of this device are based on the test circuit shown above and subject to change or obsolescence without notice. 5. all equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. 6. 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. 7. for questions on technology, prices and delivery please contact our sales offices or email to sales@vanlong.com. SF218
218.50 mhz saw filter phone: +86 (10) 5820-3910 fax: +86 (10) 5820-3915 email: sales@vanlong.com web: http://www. vanlong.com ? 2007 by vanlong technology co., ltd. SF218 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 SF218 218.50 from 50 ? source to 5 0 ? load ink marking color: black or blue
|
