RF1283 • • • • Ideal Front-End Filter for European Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package The RF1283 is a low-loss, compact, and economical surface-acoustic-wave (SAW) filter designed to provide front-end selectivity in 433.92 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 Europe under ETSI I-ETS 300 220, in Germany under FTZ 17 TR 2100, in the United Kingdom under DTI MPT 1340 (for automotive only), in France under PTT Specifications ST/PAA/TPA/AGH/1542, and in Scandinavia. 433.92 MHz SAW Filter 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 execellent frequency stablility over a wide temperature range. TO39-3 Case Electrical Characteristics Center Frequency at 25°C Characteristic Absolute Frequency Tolerance from 433.92 MHz Insertion Loss 3 dB Bandwidth Rejection Sym fC ∆fC Notes 2, 3, 4, 5, 6 IL 2, 4, 7 BW3 2, 3, 4, 7 Minimum 433.840 at fC - 21.4 MHz (Image) at fC - 10.7 MHz (LO) 2 Maximum 434.00 Units MHz ±80 kHz 3 5.0 dB 400 500 700 kHz 40 50 15 30 Ultimate Temperature Typical dB 80 Operating Case Temp. TC -35 Turnover Temperature TO 20 Turnover Frequency fO 4, 7, 8 +85 25 30 °C °C fC MHz 0.032 Freq. Temp. Coefficient FTC Frequency Aging Absolute Value during the First Year |fA| <±10 ppm/°C2 ppm/yr External Impedance Series Inductance L1 33 nH L2 39 Shunt Capacitance C1 1 2, 7 C2 Lid Symbolizaation (in addition to Lot and/or Date Codes) 6.8 pF 8.2 RFM RF1283 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 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. 2. Unless noted otherwise, all measurements are made with the filter installed in the specified test fixture, which is connected to a 50Ω test system with VSWR ≤ 1.2:1. The test fixture’s 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 optimum impedance matching component values are dependent on circuit parasitic losses. 3. The frequency fC is defined as the midpoint between the 3dB frequencies. 4. Unless noted otherwise, specifications apply over the entire specified operating temperature range. 5. One or more of the following U.S. Patents apply: 4,454,488; 4,616,197; and others 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 center frequency at any case temperature, TC, 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 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com RF1283-101599 Page 1 of 2 433.92 MHz SAW Filter 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 Temperature 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 0 -10 LO Amplitude Response -20 -30 -40 -2 -3 -4 Min 3dB Passband at 25 oC -5 -6 Image -50 -7 -60 -8 150 KHz/div Frequency -70 -80 Case Design 5 MHz/div Frequency C G B Electrical Connections H Bottom View Pin Connection 1 2 3 Input or Output Output or Input Case Ground F E A Pin 1 Pin 2 D (3 places) Pin 3 J (2 places) 45° Typical Test Circuit Millimeters L From 50 Ω SOURCE 1 C Min 2 3 Inches Dimensions L C To 50 Ω LOAD 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 ©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: [email protected] http://www.rfm.com RF1283-101599 Page 2 of 2