PDF RF1284 Data sheet ( Hoja de datos )

Número de pieza	RF1284
Descripción	SAW Filter
Fabricantes	RF Monolithics
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No Preview Available ! www.DataSheet4U.com ® • 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 319.508 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 ad- vanced 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 stabil- ity over a wide temperature range. RF1284 319.508 MHz SAW Filter TO39-3 Case Electrical Characteristics Characteristic Center Frequency at 25°C Absolute Frequency Tolerance from 319.500 MHz Insertion Loss 3 dB Bandwidth Rejection Temperature at fc - 21.4 MHz (Image) at fc - 10.7 MHz (LO) Ultimate Operating Case Temperature Turnover Temperature Turnover Frequency Frequency Temperature Coefficent Frequency Aging Absolute Value during the First Year Impedance @ fc Input ZIN=RIN//CIN Output ZOUT=ROUT//COUT Lid Symbolization (in addition to Lot and/or Date Codes) Sym fC ∆fC IL BW3 TC TO fO FTC IfAI ZIN ZOUT Notes 1, 2 1 1, 2 1 3, 4 5 1 1 Minimum Typical Maximum 319.428 319.588 ±80 2.0 3.0 500 600 800 40 50 15 40 80 -40 +85 15 25 35 fC 0.032 ≤10 1570Ω//6.84pf 1490Ω//7.02pf RFM // RF1284 // YYWWS## Units MHz kHz dB kHz dB °C °C MHz ppm/°C2 ppm/yr nH pF 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, 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 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. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RF1284-073007 Page 1 of 6 1 page 319.508 MHz SAW Filter CH1 S11 1 U FS RF1284 DEMO DEVICE #100 FULL 2 PORTS CAL. 1 : 57 . 795 15 . 191 19 Apr 2007 09:52:20 7 . 5674 nH 319 . 500 000 MHz 1 Cor Full CH2 S22 1 U FS 1 : 52 . 545 13 . 787 6 . 8679 nH 319 . 500 000 MHz Cor 1 Full CENTER 319 . 500 000 MHz SPAN 2 . 000 000 MHz CH1 S21 LOG 1 dB/ REF -2.9 dB RF1284 DEMO DEVICE #100 THRU CAL. Cor Resp 3 1 2 19 Apr 2007 09:52:50 1 : 0 . 0000 dB 0 . 000 000 MHz BW : CH1 Markers Max REF=1 . 658896 MHz cent : 319 . 544482 MHz Q: 484 . 97 1_ loss : -1 . 8522 dB 4 CH2 S21 LOG 10 dB/ REF -2.9 dB Cor Resp 1 : -2 . 1396 dB 319 . 500 000 MHz 1 CH2 CENTER 319 . 500 000 MHz SPAN 30 . 000 000 MHz RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RF1284-073007 Page 5 of 6 5 Page

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