218.50 MHz SAW Filter • • • • • 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) SF218 Absolute Maximum Rating (Ta=25°C) Parameter Rating Unit CW RF Power Dissipation P +10 dBm DC Voltage VDC Between Any Two Pins VDC ±30 V Operating Temperature Range TA -10 ~ +60 °C Storage Temperature Range Tstg -40 ~ +85 °C Electronic Characteristics Parameter Sym Minimum Typical Maximum Unit fC NS 218.50 NS MHz Insertion Loss IL - 3.5 4.5 dB 3dB Passband BW3 2.0 - 3.0 MHz Passband Ripple ∆α - - 1.5 dB Ultimate Rejection (fC ± 4.0MHz) αrel 35 - - dB Frequency Aging |fA| - - 10 ppm/yr - 1.0 - - MΩ Nominal Frequency (at 25°C) (Center frequency between 3dB point) Absolute Value during the First Year DC Insulation Resistance Between any Two Pins NS = Not Specified Notes: 1. The frequency fC 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 50Ω test system with VSWR ≤ 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, fC. 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. Phone: +86 (10) 5820-3910 © 2007 by Vanlong Technology Co., Ltd. Fax: +86 (10) 5820-3915 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 [email protected]. Email: [email protected] Web: http://www.vanlong.com SF218 218.50 MHz SAW Filter Package Dimensions (TO-39) Electrical Connections Terminals 1 2 3 Connection Input/Output Output/Input Case Ground Package Dimensions Dimensions A B C D E F G Marking SF218 218.50 Nom. (mm) 9.35 3.40 3.00 0.45 5.08 2.54 Tol. (mm) ±0.10 ±0.10 ±0.20 ±0.10 ±0.10 ±0.20 0.45 Test Circuit Ink Marking Color: Black or Blue From 50Ω source To 50Ω load Typical Frequency Response Phone: +86 (10) 5820-3910 © 2007 by Vanlong Technology Co., Ltd. Fax: +86 (10) 5820-3915 Email: [email protected] Web: http://www.vanlong.com SF218