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RF1211B Datasheet(PDF) 1 Page - RF Monolithics, Inc |
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RF1211B Datasheet(HTML) 1 Page - RF Monolithics, Inc |
1 / 2 page ® RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com Page 1 of 2 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 http://www.rfm.com ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. RF1211B-030102 Electrical Characteristics Characteristic Sym Notes Minimum Typical Maximum Units Nominal Frequency fc 1, 2 315.00 MHz Tolerance from 315.0 MHz ∆fc ±80 dB Insertion Loss IL 1 1.7 3.0 dB 3 dB Bandwidth BW3 1, 2 500 700 800 kHz Rejection at fc - 21.4 MHz (Image) 1 40 50 dB at fc - 10.7 MHz (LO) 15 40 Ultimate 80 Temperature Operating Case Temp. TC 3, 4 -40 +85 °C Turnover Temperature TO 22 37 52 °C Turnover Frequency fO fc MHz Freq. Temp. Coefficient FTC 0.032 ppm/°C2 Frequency Aging Absolute Value during the First Year |fA| 5 ≤10 ppm/yr External Impedance Series Inductance L 1 86 nH (Pin 1), 82 nH (Pin 2) Shunt Capacitance C 9 pF Lid Symbolization (in addition to Lot and/or Date Codes) RFM RF1211B SM8558-8 Case • Ideal Front-End Filter for Domestic Wireless Receivers • Low-Loss, Coupled-Resonator Quartz Design • Simple External Impedance Matching • Surface-Mount Ceramic Case with 52 mm2 Footprint • Complies with Directive 2002/95/EC (RoHS) The RF1211B is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to pro- vide front-end selectivity in 315.0 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 wire- less remote-control and security devices (especially for automotive keyless entry) operating in the USA under FCC Part 15, in Canada under RSS-210, and in Italy 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 ad- vanced SAW design and fabrication technology is utilized to achieve high performance and very low loss with simple external impedance matching (not included). Our new patent pending solder seal process utilizes a Faraday shield lid, which improves out of band rejection. 315.0 MHz SAW Filter RF1211B 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 system with VSWR ≤ 1.2:1. The test fixture L and C are adjusted for minimum insertion loss at the filter center frequency, f c. 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 +65°C or less. Aging may exceed the specification for prolonged temperatures above +65°C. 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. |
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Similar Description - RF1211B |
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