RF1210B ® • • • • • Ideal Front-End Filter for European Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Surface-Mount Ceramic Case with 52 mm2 Footprint Complies with Directive 2002/95/EC (RoHS) 303.825 MHz SAW Filter The RF1210B is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 303.825 MHz receivers. Receiver designs using this filter include superhet with 10.7 MHz or 500 kHz IF, direct conversion and superregen. Typical applications of these receivers are wireless remote-control and security devices operating in the USA under FCC Part 15, Australia, Japan and Korea. 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. Our new patent pending solder seal process utilizes a Faraday shield lid, which improves out of band rejection. SM8558-8 Case Electrical Characteristics Characteristic Center Frequency at 25°C Absolute Frequency Tolerance from 303.825 MHz Insertion Loss 3 dB Bandwidth Rejection Sym Notes fc 1, 2 IL 1 1, 2 at fc - 21.4 MHz (Image) at fc - 10.7 MHz (LO) Maximum Units 303.905 MHz ±80 kHz 1.7 3.0 dB 500 700 800 kHz 40 50 1 15 40 Ultimate Temperature Typical 303.745 ∆fc BW3 Minimum dB 80 Operating Case Temp. TC -35 Turnover Temperature TO 22 Turnover Frequency fO Freq. Temp. Coefficient FTC Frequency Aging Absolute Value during the First Year |fA| External Impedance Series Inductance L Shunt Capacitance C 3, 4 5 1 Lid Symbolization (in addition to Lot and/or Date Codes) +85 37 52 °C fc MHz 0.032 ppm/°C2 ≤10 ppm/yr 82 nH 9 pF RFM RF1210B 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 and bandwidth are dependent on the impedance matching component values and quality. 2. The frequency fc is defined as the midpoint between the 3dB frequencies. 3. Unless noted otherwise, 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 RF1210B-083101 Page 1 of 2 303.825 MHz SAW Filter Absolute Maximum Ratings Rating Value Units +13 dBm Incident RF Power DC Voltage between any 2 pins (Observe ESD Precautions) Case Temperature5 Soldering Temperature Electrical Connections Pin ±30 VDC -40 to +85 °C 260 °C (10 seconds / 5 cycles max.) Case Design Connection 1 Input 2 Ground 3 Output Return 4 Case Ground 5 Output 6 Ground 7 Input Return 8 Case Ground Dimensions Typical Test Circuit 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. Millimeters Min Max Inches Min Max A 8.71 0.343 B 6.04 0.238 C 2.03 0.080 D 0.79 Nominal 0.031 Nominal E 1.14 Nominal 0.045 Nominal F 1.98 Nominal 0.078 Nominal G 0.79 Nominal 0.031 Nominal H 6.91 0.040 K 4.24 0.167 M 0.81 0.032 N 2.54 Nominal 0.100 Nominal P 1.91 Nominal 0.075 Nominal E-mail: [email protected] http://www.rfm.com RF1210-083101 Page 2 of 2