RF1284 Datasheet | RF Monolithics

.. ® 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 plies with Directive 2002/95/EC (Ro HS) Pb The RF1284 is a low-loss, pact 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 k Hz IF, direct conversion and superregen. This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater than 40 d B, 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 d B 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 f O FTC If AI ZIN ZOUT 5 1 1 3, 4 -40 15 25 f C 0.032 ≤10 1570Ω//6.84pf 1490Ω//7.02pf RFM // RF1284 // YYWWS## 1 Absolute Frequency Tolerance from 319.500 MHz Sym f C ∆f C IL BW3 Notes 1, 2 1 1, 2 500 40 15 2.0 600 50 40 80 +85 35 °C °C MHz ppm/°C2 ppm/yr n H p F d B Minimum 319.428 Typical Maximum 319.588 ±80 3.0 800 Units MHz k Hz d B k Hz 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 Ω test...