RF1284 * * * * * 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 319.508 MHz SAW Filter 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 25C Sym Absolute Frequency Tolerance from 319.500 MHz Insertion Loss 3 dB Bandwidth Rejection fC fC Notes 319.428 IL 1 1, 2 at fc - 21.4 MHz (Image) 1 Units 319.588 MHz 80 kHz 2.0 3.0 dB 600 800 kHz 40 50 15 40 dB 80 Operating Case Temperature TC -40 Turnover Temperature TO 15 Turnover Frequency fO Frequency Temperature Coefficent FTC Frequency Aging Absolute Value during the First Year IfAI Impedance @ fc Input ZIN=RIN//CIN Output ZOUT=ROUT//COUT Maximum 500 Ultimate Temperature Typical 1, 2 BW3 at fc - 10.7 MHz (LO) Minimum 3, 4 +85 25 35 C C fC MHz 0.032 ppm/C2 5 10 ppm/yr ZIN 1 1570//6.84pf nH ZOUT 1 1490//7.02pf pF Lid Symbolization (in addition to Lot and/or Date Codes) RFM // RF1284 // YYWWS## CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. 7. 8. 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. The frequency fc is defined as the midpoint between the 3dB frequencies. Where noted, specifications apply over the entire specified operating temperature range. 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]. 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. www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. Page 1 of 6 RF1284 - 3/21/08 Absolute Maximum Ratings Rating Value Units Incident RF Power +13 dBm DC Voltage Between Any Two Pins (Observe ESD Precautions) 30 VDC -40 to +85 C 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 dB -1 Amplitude Response -2 0 -10 LO Amplitude Response -20 -30 -3 -4 Min 3dB Min 3dB Passband Passband at 25C o -5 at 25 C -6 -40 Image -7 -50 -8 -60 150 KHz/div Frequency -70 -80 5 MHz/div Frequency Case Design C Electrical Connections G B Bottom View Pin Connection 1 Input or Output 2 Output or Input 3 Case Ground H F Pin 1 Pin 2 E A D (3 places) Pin 3 J (2 places) 45 Typical Test Circuit L From 50 Network Analyzer L 1 C Millimeters 2 3 C To 50 Network Analyzer Min Max A 9.30 B 3.18 C D 2.50 3.50 0.46 Nominal Min Max 0.366 0.125 0.098 0.138 0.018 Nominal E 5.08 Nominal 0.200 Nominal F 2.54 Nominal 0.100 Nominal G 2.54 Nominal 0.100 Nominal H J www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. Inches Dimensions 1.02 1.40 0.040 0.055 Page 2 of 6 RF1284 - 3/21/08 19 Apr 2007 09:49:09 CH1 S11 1 U FS 9 . 0879 1 : 53 . 895 4 . 5270 nH 319 . 500 000 MHz 4 . 2565 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #98 FULL 2 PORTS CAL. 1 Cor Full CH2 S22 1 U FS 8 . 5449 1 : 49 . 963 Cor 1 Full 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 BW : Cor cent : MHz 319 . 535654 MHz 2 Q: 474 . 66 1_ loss Resp CH2 3 S21 LOG 10 dB/ Markers REF=1 . 673195 : -1 . 7450 dB 4 REF -2.9 dB 1 : -1 . 9228 dB 319 . 500 000 MHz 1 Cor Resp CH2 CENTER www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 319 . 500 000 MHz SPAN 30 . 000 000 MHz Page 3 of 6 RF1284 - 3/21/08 19 Apr 2007 09:50:51 CH1 S11 1 : 44 . 488 1 U FS 12 . 287 6 . 1207 nH 319 . 500 000 MHz 5 . 2110 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #99 FULL 2 PORTS CAL. 1 Cor Full CH2 S22 1 : 54 . 975 1 U FS 10 . 461 Cor 1 Full 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. CH1 Max 1 BW : Cor cent : Markers REF=1 . 677150 MHz 319 . 494904 MHz 2 Q: 471 . 82 1_ loss Resp CH2 LOG 10 dB/ dB 4 3 S21 : -1 . 6733 REF -2.9 dB 1 : -1 . 8845 dB 319 . 500 000 MHz 1 Cor Resp CH2 www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. CENTER 319 . 500 000 MHz SPAN 30 . 000 000 MHz Page 4 of 6 RF1284 - 3/21/08 19 Apr 2007 09:52:20 CH1 S11 1 : 57 . 795 1 U FS 15 . 191 7 . 5674 nH 319 . 500 000 MHz 6 . 8679 nH 319 . 500 000 MHz RF1284 DEMO DEVICE #100 FULL 2 PORTS CAL. 1 Cor Full CH2 S22 1 : 52 . 545 1 U FS 13 . 787 Cor 1 Full 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 BW : Cor cent : Markers REF=1 . 658896 MHz 319 . 544482 MHz 2 Q: 484 . 97 1_ loss : -1 . 8522 dB Resp 3 CH2 S21 LOG 10 dB/ 4 1 : -2 . 1396 REF -2.9 dB dB 319 . 500 000 MHz 1 Cor Resp CH2 CENTER www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 319 . 500 000 MHz SPAN 30 . 000 000 MHz Page 5 of 6 RF1284 - 3/21/08 L2 L1 J1 J2 56NH C1 12PF C2 1PF PCB, IND, CAP, CAP, 400-0455-001 501-0966-560, 1008CS 56NH 501-1275-010, 0805, 1PF 501-1275-120, 0805, 12PF www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. RF1284 DEMO 56NH C3 1PF C4 12PF L1, L2 C2, C3 C1, C1 Page 6 of 6 RF1284 - 3/21/08