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| (R) RF1283 433.92 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 RF1283 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 433.92 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are wireless remote-control and security devices operating in Europe under ETSI I-ETS 300 220. 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 execellent frequency stablility over a wide temperature range. TO39-3 Case Electrical Characteristics 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 Temp. Turnover Temperature Turnover Frequency Freq. Temp. Coefficient Frequency Aging External Impedance Absolute Value during the First Year Series Inductance Shunt Capacitance Lid Symbolizaation (in addition to Lot and/or Date Codes) TC TO fO FTC |fA| L1 L2 C1 C2 1 5 3, 4 -35 20 25 fC 0.032 10 33 39 6.8 8.2 RFM RF1283 pF 1 Characteristic Absolute Frequency Tolerance from 433.92 MHz Sym fC fC IL BW3 Notes 1, 2 1 1, 2 400 40 15 Minimum 433.840 Typical Maximum 434.00 80 3 500 50 30 80 Units MHz kHz dB kHz dB 5.0 700 +85 30 C C MHz ppm/C2 ppm/yr nH 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. Unless noted otherwise, 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 be calculated from: f = fo [1 - FTC (To - Tc)2]. 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. 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 RF1283-082801 Page 1 of 2 433.92 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 Passband at 25 oC Electrical Connections Bottom View Case Design C B G Pin 1 2 3 Connection Input or Output Output or Input Case Ground Pin 1 Pin 2 H Pin 3 F A D (3 places) E Typical Test Circuit J (2 places) 45 L1 From 50 SOURCE 1 2 3 L2 To 50 LOAD Millimeters Dimensions Min A B C D E F G H J 1.40 2.50 Max 9.40 3.18 3.50 0.098 0.46 Nominal 5.08 Nominal 2.54 Nominal 2.54 Nominal 1.02 0.055 Min Inches Max 0.370 0.125 0.138 0.018 Nominal 0.200 Nominal 0.100 Nominal 0.100 Nominal 0.040 C1 C2 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 RF1283-082801 Page 2 of 2 |
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