RF3210 • • • • • Ideal Front-End Filter for 303.825 MHz Wireless Receivers Low-Loss, Coupled-Resonator Quartz Design Simple External Impedance Matching Rugged TO39 Hermetic Package Pb Complies with Directive 2002/95/EC (RoHS) 303.825 MHz SAW Filter The RF3210 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 superheterodynes with 10.7 MHz or 500 kHz IF’s, direct conversions and superregeneratives. This coupled-resonator filter (CRF) uses selective null placement to provide suppression, typically greater than 40 dB, of the LO and image responses of superhet receivers with 10.7 MHz IF’s. 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 fC Center Frequency at 25°C Center Frequency Tolerance from 303.825 MHz ∆fC Notes 1, 2 Insertion Loss IL 1 3 dB Passband BW3 1, 2 Rejection Minimum 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 35 Ultimate Temperature Frequency Aging Impedance @ fC dB 60 Operating Case Temp. TC Turnover Temperature TO Freq. Temp. Coefficient FTC Absolute Value during the First Year |fA| Input: ZIN = RIN || CIN ZIN Output: ZOUT = ROUT || COUT Typical 303.745 ZOUT -40 3, 4 5 1 Lid Symbolization (in addition to Lot and/or Date Codes) 10 +85 25 40 °C 0.032 ppm/°C2 ≤10 ppm/yr 80.3 Ω || 8.34 pF 91.4 Ω || 9.15 pF RFM RF3210 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 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, 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. Unless noted otherwise, 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 +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. 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: [email protected] ©2009 by RF Monolithics, Inc. Page 1 of 2 RF3210 - 6/19/09 Absolute Maximum Ratings Rating Incident RF Power DC Voltage Between Any Two Pins (Observe ESD Precautions) Case Temperature 5 Value Units +13 dBm ±30 VDC -40 to +85 °C 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 0 dB -10 LO -2 Amplitude Response Amplitude Response -20 -30 -40 Image -50 -3 -4 Minimum 3dB Passband at 25 oC -5 -6 -60 -7 -70 -8 -80 100 KHz/div Frequency 5 MHz/div Frequency Case Design Electrical Connections C Bottom View Pin Connection Pin 1 1 2 3 G B Pin 2 Input or Output H F E A Output or Input Pin 3 D (3 places) Case Ground J (2 places) 45° Typical Test Circuit Millimeters L From 50 Ω Network Analyzer L 1 C Min 2 3 C To 50 Ω Network Analyzer Max A 9.40 B 3.18 C 2.50 3.50 Min Max 0.370 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 www.RFM.com E-mail: [email protected] ©2009 by RF Monolithics, Inc. Inches Dimensions 1.02 1.40 0.040 0.055 Page 2 of 2 RF3210 - 6/19/09