RFM products are now Murata products. 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. Characteristic Center Frequency at 25C Sym Absolute Frequency Tolerance from 319.500 MHz Insertion Loss 3 dB Bandwidth Rejection fC fC Notes 1, 2 IL 1 BW3 1, 2 Minimum Maximum Units 319.588 MHz 80 kHz 2.0 3.0 dB 500 600 800 kHz 40 50 15 40 1 Ultimate Temperature Typical 319.428 at fc - 21.4 MHz (Image) at fc - 10.7 MHz (LO) TO39-3 Case dB 80 Operating Case Temperature TC Turnover Temperature TO Turnover Frequency fO -40 15 3, 4 +85 25 35 C C fC MHz 0.032 ppm/C2 Frequency Temperature Coefficent FTC Frequency Aging Absolute Value during the First Year IfAI 5 10 ppm/yr Impedance @ fc Input ZIN=RIN//CIN ZIN 1 1570//6.84pf nH ZOUT 1 1490//7.02pf pF Output ZOUT=ROUT//COUT 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. (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 Page 1 of 6 www.murata.com 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 -2 Amplitude Response 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 Pin Bottom View Connection 1 Input or Output 2 Output or Input 3 Case Ground G B Pin 1 H F Pin 2 E A D (3 places) Pin 3 J (2 places) 45 Typical Test Circuit L From 50 Network Analyzer L 1 C 2 3 C Dimensions To 50 Network Analyzer Millimeters Min A 9.30 B 3.18 C 2.50 Max 0.366 0.125 0.098 0.138 0.46 Nominal E 5.08 Nominal 0.200 Nominal F 2.54 Nominal 0.100 Nominal G 2.54 Nominal 0.100 Nominal J Page 2 of 6 3.50 Min D H (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 Max Inches 0.018 Nominal 1.02 1.40 0.040 0.055 www.murata.com 19 Apr 2007 09:49:09 CH1 S11 1 : 53 . 895 1 U FS 9 . 0879 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 : 49 . 963 1 U FS 8 . 5449 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 319 . 500 (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 000 MHz SPAN Page 3 of 6 30 . 000 000 MHz www.murata.com 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 U FS 10 . 461 1 : 54 . 975 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 CENTER 319 . 500 (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 000 MHz SPAN Page 4 of 6 30 . 000 000 MHz www.murata.com 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/ 1 : 0 . 0000 REF -2.9 dB dB 0 . 000 000 MHz RF1284 DEMO DEVICE #100 THRU CAL. CH1 Max 1 BW : Cor cent : MHz 319 . 544482 MHz 2 Q: 484 . 97 1_ loss Resp CH2 3 S21 LOG 10 dB/ Markers REF=1 . 658896 : -1 . 8522 dB 4 REF -2.9 dB 1 : -2 . 1396 dB 319 . 500 000 MHz 1 Cor Resp CH2 CENTER 319 . 500 (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 000 MHz SPAN Page 5 of 6 30 . 000 000 MHz www.murata.com L2 L1 J1 56NH C1 12PF C2 1PF PCB, IND, CAP, CAP, RF1284 DEMO 400-0455-001 501-0966-560, 1008CS 56NH 501-1275-010, 0805, 1PF 501-1275-120, 0805, 12PF (c)2010-2015 by Murata Electronics N.A., Inc. RF1284 (R) 4/6/15 J2 56NH C3 1PF C4 12PF L1, L2 C2, C3 C1, C1 Page 6 of 6 www.murata.com