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| (R) RF1284 319.500 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 319.500 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 25C 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 External Impedance Absolute Value during the First Year Series Inductance Shunt Capacitance Lid Symbolization (in addition to Lot and/or Date Codes) TC TO fO FTC IfAI L C 5 1 1 100 10 RFM // RF1284 // DATECODE 3, 4 -40 15 25 fC 0.032 10 1 Absolute Frequency Tolerance from 319.500 MHz Sym fC fC 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 nH pF dB Minimum 319.420 Typical Maximum 319.580 80 3.0 800 Units MHz kHz dB kHz 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, fc. Note that insertion loss, bandwidth, and passband shape are dependent on the impedance matching component values and quality. 2. The frequency fc is defined as the midpoint between the 3dB frequencies. 3. Where noted, specifications apply over the entire specified operating temperature range. 4. The turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, Tc, may 5. 6. 7. 8. be calculated from: f = fo [1 - FTC (To - Tc)2]. 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. The design, manufacturing process, and specifications of this device are subject to change without notice. One or more of the following U.S. Patents apply: 4,54,488, 4,616,197, and others pending. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com RF1284-100705 Page 1 of 2 319.500 MHz Absolute Maximum Ratings Rating Incident RF Power SAW Filter Value +13 30 -40 to +85 Units dBm VDC C DC Voltage Between Any Two Pins (Observe ESD Precautions) Case Temperature5 Typical Filter Response Typical filter responses are shown below. The actual response is dependent on external impedance matching and circuit layout. Illustrated frequencies and minimum rejection for LO and IMAGE are shown only for superhet receivers with 10.7 MHz IF. 0 -10 -20 Amplitude Response -30 -40 -50 -60 -70 -80 5 MHz/div Frequency Image LO 0 dB -1 Amplitude Response -2 -3 -4 -5 -6 -7 -8 150 KHz/div Frequency Min 3dB Min 3dB Passband Passband at 25C o at 25 C Electrical Connections Bottom View Case Design C G Pin 1 2 3 Connection Input or Output Output or Input Case Ground Pin 1 Pin 2 B H Pin 3 A D (3 places) E F Typical Test Circuit J (2 places) 45 L From 50 Network Analyzer 1 2 3 L To 50 Network Analyzer C C Millimeters Dimensions Min A B C D E F G H J 1.40 2.50 Max 9.30 3.18 3.50 Min Inches Max 0.366 0.125 0.098 0.138 0.018 Nominal 0.200 Nominal 0.100 Nominal 0.100 Nominal 0.040 0.055 0.46 Nominal 5.08 Nominal 2.54 Nominal 2.54 Nominal 1.02 RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com http://www.rfm.com RF1284-100705 Page 2 of 2 |
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