RF3171 Ideal Front-End Filter for Wireless Receiver in the UK and USA Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching 418.0 MHz Rugged TO39 Hermetic Package Pb Complies with Directive 2002/95/EC (RoHS) 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. Muratas 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 Characteristic Sym Notes Minimum Typical Maximum Units Nominal Frequency f 417.920 418.080 MHz c 1, 2 Tolerance from 418.0 MHz fc 80 dB Insertion Loss IL 1 1.8 3.5 dB 3 dB Bandwidth BW 500 600 800 1, 2 kHz 3 Rejection at f - 21.4 MHz (Image) 40 50 C at f - 10.7 MHz (LO) 1 15 30 dB C Ultimate 80 Temperature Operating Case Temp. T -35 +85 C C Turnover Temperature T 15 25 35 C O 3, 4 Turnover Frequency f f MHz O C 2 Freq. Temp. Coefficient FTC 0.032 ppm/C Frequency Aging Absolute Value during the First Year fA 5 10 ppm/yr Impedance F Z =R //C 392 // 2.84 pF C IN IN IN 1 Z =R //C 476 // 3.17 pF OUT OUT OUT Lid Symbolization (in addition to Lot and/or Date Codes) RFM RF3171 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 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 . Note that insertion loss, bandwidth, and passband shape c are dependent on the impedance matching component values and quality. 2. The frequency f is defined as the midpoint between the 3dB frequencies. c 3. Unless noted otherwise, specifications apply over the entire specified operating temperature range. 4. The turnover temperature, T , is the temperature of maximum (or turnover) frequency, f . The nominal frequency at any case temperature, T , may be O o c 2 calculated from: f = f 1 - FTC (T -T ) . o o c 5. Frequency aging is the change in fc with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years. 6. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending. 8. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. Copyright Murata Manufacturing Co., Ltd. All rights reserved. April 2015 RF3171 (R) 11/17/17 Page 1 of 2 www.murata.comAbsolute Maximum Ratings Rating Value Units Incident RF Power +13 dBm DC Voltage Between Any Two Pins (Observe ESD Precautions) 30 VDC 5 -45 to +85 C Case Temperature Soldering Temperature (10 seconds / 5 cycles max.) 260 C Typical Filter Response Typical filter responses are shown below. The actual response is 0 dependent on external impedance matching and circuit layout. Illustrated dB -1 frequencies and minimum rejection for LO and IMAGE are shown only for superhet receivers with 10.7 MHz IF. -2 0 -3 -10 -4 LO Min 3dB -20 Passband -5 o -30 at 25 C -6 -40 Image -7 -50 -8 -60 150 KHz/div Frequency -70 -80 Case Design 5 MHz/div Frequency C G B H Electrical Connections F E A Bottom View Pin Connection D Pin 1 (3 places) Pin 2 1 Input or Output 2 Output or Input J Pin 3 (2 places) 45 3 Case Ground Millimeters Inches Typical Demonstration Circuit Dimensions Min Max Min Max A 9.40 0.370 L L B 3.18 0.125 1 2 C 2.50 3.50 0.098 0.138 From 50 To 50 3 CC D 0.46 Nominal 0.018 Nominal Network Network Analyzer Analyzer E 5.08 Nominal 0.200 Nominal F 2.54 Nominal 0.100 Nominal G 2.54 Nominal 0.100 Nominal H 1.02 0.040 J 1.40 0.055 Copyright Murata Manufacturing Co., Ltd. All rights reserved. April 2015 www.murata.com RF3171 (R) 11/17/17 Page 2 of 2 Amplitude Response Amplitude Response