RF3171

RF3171 Ideal Front-End Filter for Wireless Receiver in the UK and USA Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Complies with Directive 2002/95/EC (RoHS) Pb 418.0 MHz SAW Filter The RF3171 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 418.0 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz direct conversion and superregen. Typical applications of these receivers are wireless remote-control and security devices operating in the USA under FCC Part 15. 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 Nominal Frequency Tolerance from 418.0 MHz Insertion Loss 3 dB Bandwidth Rejection at fC - 21.4 MHz (Image) at fC - 10.7 MHz (LO) Ultimate www.DataSheet.net/ Sym fc ∆fc IL BW3 Notes 1, 2 1 1, 2 1 Minimum 417.920 Typical Maximum 418.080 ±80 Units MHz dB dB kHz dB 1.8 500 40 15 -35 15 25 fC 0.032 ≤10 392 // 2.84 pF 476 Ω // 3.17 pF RFM RF3171 600 5...