SAW Filter

www.DataSheet4U.com ® RF1284 319.508 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 319.508 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 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 25°C 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 Impedance @ fc Absolute Value during the First Year Input ZIN=RIN//CIN Output ZOUT=ROUT//COUT Lid Symbolization (in addition to Lot and/or Date Codes) TC TO fO FTC IfAI ZIN ZOUT 5 1 1 3, 4 -40 15 25 fC 0.032 ≤10 1570Ω//6.84pf 1490Ω//7.02pf RFM // RF1284 // YYWWS## 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 319.428 Typical Maximum 319.588 ±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 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, T O, is the temperature of maximum (or turnover) frequency, f o. The nominal frequency at any case temperature, T c, 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 +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. 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 ©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 RF1284-073007 Page 1 of 6 319.508 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 -2 Amplitude Response -3 -4 -5 -6 -7 -8 150 KHz/div Frequency Min 3dB Min 3dB Passband Passband at 25°C 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 Ω Network Analyzer 1 2 3 L To 50 Ω 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 ©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 RF1284-073007 Page 2 of 6 319.508 MHz CH1 S11 1 U FS 1 : 53 . 895 SAW Filter 19 Apr 2007 09:49:09 9 . 0879 4 . 5270 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #98 FULL 2 PORTS CAL. Cor 1 Full CH2 S22 1 U FS 1 : 49 . 963 8 . 5449 4 . 2565 nH 319 . 500 000 MHz Cor Full 1 CENTER 319 . 500 000 MHz SPAN 2 . 000 000 MHz 19 Apr 2007 09:49:37 CH1 S21 LOG 1 dB/ REF -2.9 dB 1 : 0 . 0000 dB 0 . 000 000 MHz RF1284 DEMO DEVICE #98 THRU CAL. CH1 Max 1 Cor 2 cent BW : : Markers REF=1 MHz MHz . 673195 319 . 535654 Q: 474 . 66 1_ loss : -1 . 7450 dB Resp 3 4 CH2 S21 LOG 10 dB/ REF -2.9 dB 1 : -1 . 9228 dB 319 . 500 000 MHz 1 Cor Resp 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: info@rfm.com http://www.rfm.com RF1284-073007 Page 3 of 6 319.508 MHz CH1 S11 1 U FS 1 : 44 . 488 SAW Filter 19 Apr 2007 09:50:51 12 . 287 6 . 1207 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #99 FULL 2 PORTS CAL. 1 Cor Full CH2 S22 1 U FS 1 : 54 . 975 10 . 461 5 . 2110 nH 319 . 500 000 MHz Cor Full 1 CENTER 319 . 500 000 MHz SPAN 2 . 000 000 MHz 19 Apr 2007 09:51:09 CH1 S21 LOG 1 dB/ REF -2.9 dB 1 : 0 . 0000 dB 0 . 000 000 MHz RF1284 DEMO DEVICE #99 THRU CAL. 1 Cor 2 cent CH1 Max BW : : Markers REF=1 MHz MHz . 677150 319 . 494904 Q: 471 . 82 1_ loss Resp : -1 . 6733 dB 3 4 CH2 S21 LOG 10 dB/ REF -2.9 dB 1 : -1 . 8845 dB 319 . 500 000 MHz 1 Cor Resp 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: info@rfm.com http://www.rfm.com RF1284-073007 Page 4 of 6 319.508 MHz CH1 S11 1 U FS 1 : 57 . 795 SAW Filter 19 Apr 2007 09:52:20 15 . 191 7 . 5674 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #100 FULL 2 PORTS CAL. 1 Cor Full CH2 S22 1 U FS 1 : 52 . 545 13 . 787 6 . 8679 nH 319 . 500 000 MHz Cor Full 1 CENTER 319 . 500 000 MHz SPAN 2 . 000 000 MHz 19 Apr 2007 09:52:50 CH1 S21 LOG 1 dB/ REF -2.9 dB 1 : 0 . 0000 dB 0 . 000 000 MHz RF1284 DEMO DEVICE #100 THRU CAL. CH1 Max 1 Cor 2 1_ loss Resp Markers REF=1 MHz MHz BW : cent : . 658896 319 . 544482 Q: 484 . 97 : -1 . 8522 dB 3 4 CH2 S21 LOG 10 dB/ REF -2.9 dB 1 : -2 . 1396 dB 319 . 500 000 MHz 1 Cor Resp 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: info@rfm.com http://www.rfm.com RF1284-073007 Page 5 of 6 319.508 MHz SAW Filter L2 L1 J1 56NH C1 12PF C2 1PF RF1284 DEMO 56NH C3 1PF C4 12PF J2 PCB, IND, CAP, CAP, 400-0455-001 501-0966-560, 1008CS 56NH 501-1275-010, 0805, 1PF 501-1275-120, 0805, 12PF L1, L2 C2, C3 C1, C1 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: info@rfm.com http://www.rfm.com RF1284-073007 Page 6 of 6