RF1284

www.DataSheet4U.com ® RF1284 319.508 MHz SAW Filter Ideal Front-End Filter for European Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS) Pb The RF1284 is a low-loss, compact and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 319.508 MHz receivers. Recevier designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. 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. 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). Quartz construction provides excellent frequency stability over a wide temperature range. TO39-3 Case Electrical Characteristics Characteristic Center Frequency at 25°C Insertion Loss 3 dB Bandwidth Rejection at fc - 21.4 MHz (Image) at fc - 10.7 MHz (LO) Ultimate Temperature Operating Case Temperature Turnover Temperature Turnover Frequency Frequency Temperature Coefficent Frequency Aging Impedance @ fc Absolute Value during the First Year Input ZIN=RIN//CIN Output ZOUT=ROUT//COUT Lid Symbolization (in addition to Lot and/or Date Codes) TC TO fO FTC IfAI ZIN ZOUT 5 1 1 3, 4 -40 15 25 ...