RF1327-1 * * * * Ideal Front-End Filter Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package The RF1327-1 is a low-loss, compact and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity receivers. Receiver designs using this filter include superhet with 10.7 MHz, direct conversion and superregen. Typical applications of these FSK receivers are wireless remote-control and security devices. 927.778 MHz SAW Filter This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater than 40 dB. 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 Sym Notes Minimum Typical Maximum Units Nominal Frequency fC 2, 4, 5, 6 927.578 927.778 927.978 MHz Insertion Loss IL 3, 4, 7 3 dB Passband BW3 2, 3, 4, 7 3 dB Reject Band BW3 2, 3, 4, 7 Rejection at fC - 21.4 MHz (Image) at fC - 10.7 MHz (LO) Ultimate Temperature 5.0 dB kHz 80 40 50 15 30 4 80 Operating Case Temperature TC -40 Turnover Temperature TO 15 Turnover Frequency fO 25 kHz dB +85 C 40 C fC MHz Frequency Temperature Coefficient FTC 3, 7, 8 0.032 ppm/C2 Frequency Aging Absolute Value during the First Year IfAI 3 10 ppm/yr External Impedance Series Inductance L 10 nH Shunt Capacitance C 3.3-3.9 pF 1, 7 Lid Symbolization (in addition to Lot and/or Date Codes) RFM RF1327-1 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. Typical test circuit is shown for TO-39 RF filters. 2. Passband and reject bands are specified in reference to fC. 3. All characteristics are specified over the operating temperature range and typical aging for 10 years. 4. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture. Note that insertion loss, bandwidth, and passband shape are dependent on the impedance matching component values and quality. Demonstration circuits are available for confirmation of device performance. 5. One or more of the following U.S. Patents apply: 4,454,488; 4,616,197; and other pending. 6. All equipment designs utilizing this product must be approved by the appropriate government agency prior to manufacture or sale. 7. The design, manufacturing process, and specifications of this device are subject to change without notice. 8. The turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fo. The nominal frequency at any case temperature, TC, outside the operating temperature range may be calculated from: f = fo [1 - FTC (TO - TC)2]. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)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 RF1327-1-090600 Page 1 of 2 927.778 MHz SAW Filter Absolute Maximum Ratings Rating Incident RF Power DC Voltage Between Any Two Pins (Observe ESD Precautions) Case Temperature Value Units +13 dBm 30 VDC -40 to +85 C Typical Filter Response Typical filter responses are shown below. Illustrated frequencies and minimum rejection for LO and IMAGE are shown only for superhet receivers with 10.7 MHz IF. 0 dB -1 0 -10 LO Amplitude Response Amplitude Response -20 -30 -40 Image -50 -2 -3 -4 Min 3dB Passband at 25 oC -5 -60 -6 -70 -7 -8 -80 5 MHz/div Frequency 150 KHz/div Frequency Electrical Connections Case Design Bottom View Pin 1 2 3 C Connection Input or Output Output or Input Case Ground G B Pin 1 Pin 2 H Pin 3 F E A D (3 places) Typical Test Circuit J (2 places) L From 50 Network Analyzer L 1 C Millimeters Inches Dimensions 2 3 45 C To 50 Network Analyzer Min A 3.50 Max 0.366 3.18 2.50 0.125 0.098 0.138 D 0.46 Nominal 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 RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. Min 9.30 B C Max 1.02 1.40 0.040 0.055 E-mail: info@rfm.com http://www.rfm.com RF1327-1-090600 Page 2 of 2