RO3112 * * * * * Ideal for European 433.92 MHz Superhet Receiver LOs Very Low Series Resistance Quartz Stability Rugged, Hermetic, Low-Profile TO39 Case Pb Complies with Directive 2002/95/EC (RoHS) 433.42 MHz SAW Resonator The RO3112 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at approximately 433.42 MHz. The RO2112 is designed for IC based 433.92 MHz superhet receivers with 500 kHz IF (Philips UAA3201T). Applications include remote-control and wireless security devices operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100. Absolute Maximum Ratings Rating Value Units CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm DC Voltage Between Any Two Pins (Observe ESD Precautions) 30 VDC -40 to +85 C 260 C Case Temperature Soldering Temperature (10 seconds / 5 cycles max.) Electrical Characteristics Characteristic Center Frequency (+25 C) Sym Absolute Frequency fC Insertion Loss Quality Factor Temperature Stability Frequency Aging 2, 3, 4, 5 fC Tolerance from 433.420 MHz IL Unloaded Q QU 50 Loaded Q QL Turnover Temperature TO Turnover Frequency fO 1.3 |fA| 25 MHz 75 kHz 1.5 dB 40 C fc kHz 0.037 ppm/C2 ppm/yr 10 1 5 Units 433.495 940 6, 7, 8 Absolute Value during the First Year Maximum 7500 10 FTC Typical 433.345 5, 6, 7 Frequency Temperature Coefficient 1.0 M 14.5 5, 7, 9 39.6 H 3.4 fF CO 5, 6, 9 3.5 pF CP 5, 6, 7, 9 3.2 pF LTEST 2, 7 39 nH Motional Resistance RM Motional Inductance LM Motional Capacitance CM Pin 1 to Pin 2 Static Capacitance Transducer Static Capacitance Test Fixture Shunt Inductance Minimum 2, 5, 6 DC Insulation Resistance between Any Two Pins RF Equivalent RLC Model Notes TO39-3 Case Lid Symbolization (in Addition to Lot and/or Date Codes) RFM RO3112 CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 6. 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 center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLATOR or fTRANSMITTER is less than the resonator fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197 and others pending. Typically, equipment designs utilizing this device require emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25C2C. The design, manufacturing process, and specifications of this device are www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 7. 8. 9. subject to change without notice. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 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]. Typically, oscillator TO is 20C less than the specified resonator TO. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance CO is the static (nonmotional) capacitance between pin1 and pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes case parasitic capacitance with a floating case. For usual grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pF to CO. Page 1 of 2 RO3112 - 3/26/08 Electrical Connections Temperature Characteristics Pin Bottom View Connection Pin 1 1 Terminal 1 2 Terminal 2 3 Case Ground Pin 2 The curve shown on the right accounts for resonator contribution only and does not include oscillator temperature characteristics. fC = f O , T C = T O 0 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) This one-port, two-terminal SAW resonator is bidirectional. The terminals are interchangeable with the exception of circuit board layout. Pin 3 -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 T = T C - T O ( C ) Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO at FC. Equivalent LC Model The following equivalent LC model is valid near resonance: Electrical Test: 1 2 2 1 Network Analyzer Network Analyzer Co= Cp + 0.25 pF* Cp *Case Parasitics R 3 M L M C M 0.5 pF* 0.5 pF* 3 Power Test: 1 P INCIDENT Low-Loss Matching Network to 50 50 Source at P REFLECTED F C Case Design C G B 3 2 H F -P P INCIDENT REFLECTED CW RF Power Dissipation = E A D (3 places) Typical Application Circuits J (2 places) Typical Low-Power Transmitter Application: Modulation Input 200k MPS-H10 +9VDC Millimeters 47 C1 1 L1 Min A C2 3 RF Bypass Typical Local Oscillator Application: Output +VDC L1 +VDC 2 Min 3.50 Max 0.370 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 C1 Max 9.40 B C 470 Inches Dimensions (Antenna) 2 ROXXXX Bottom View 1 45 J 1.02 1.40 0.040 0.055 C2 ROXXXX Bottom View 3 RF Bypass www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 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