RO3112C * * * * Ideal for European 433.420 MHz Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) Pb The RO3112C is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 433.92 MHz. This SAW is designed specifically for remote-control and wireless security transmitters operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100. Absolute Maximum Ratings Rating Value Units Input Power Level 0 dBm DC voltage 12 VDC -40 to +85 C 260 C Storage Temperature Soldering Temperature (10 seconds / 5 cycles max.) 433.420 MHz SAW Resonator SM5050-8 Case 5X5 Electrical Characteristics Characteristic Center Frequency (+25 C) Sym fC Absolute Frequency Tolerance from 433.420 MHz fC Quality Factor Unloaded Q QU 50W Loaded Q QL Temperature Stability Turnover Temperature TO Turnover Frequency fO Insertion Loss Frequency Aging IL 1.2 Units 433.495 MHz 75 kHz 1.5 dB 40 C 8700 25 fC 6,7,8 Absolute Value during the First Year |fA| 0.032 10 1 5 1.0 RM Motional Inductance LM Motional Capacitance CM Shunt Static Capacitance CO LTEST 5, 7, 9 ppm/C2 ppm/yr M 11.9 37.9 H 3.6 fF 5, 6, 9 3.8 pF 2, 7 35.4 nH Lid Symbolization (in addition to Lot and/or Date Codes) Standard Reel Quantity Maximum 920 FTC Motional Resistance Typical 433.345 10 Frequency Temperature Coefficient Test Fixture Shunt Inductance 2,3,4,5 Minimum 2,5,6 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model Notes 657 // YWWS Reel Size 7 Inch 500 Pieces/Reel Reel Size 13 Inch 3000 Pieces/Reel CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. 3. 4. 5. 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 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 approximately equal to the resonator fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25C2C. www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. 6. 7. 8. 9. The design, manufacturing process, and specifications of this device are 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 approximately equal to 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 the two terminals measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with "NC" pads unconnected. Case parasitic capacitance is approximately 0.05 pF. Transducer parallel capacitance can by calculated as: CP CO - 0.05 pF. Page 1 of 2 RO3112C - 3/26/08 Power Test Electrical Connections Pin The SAW resonator is bidirectional and may be installed with either orientation. The two terminals are interchangeable and unnumbered. The callout NC indicates no internal connection. The NC pads assist with mechanical positioning and stability. External grounding of the NC pads is recommended to help reduce parasitic capacitance in the circuit. NC 1 NC 2 Terminal 3 NC 4 NC 5 NC 6 Terminal 7 NC 8 NC 50 Source at F C 1 2 3 8 NC 7 4 6 NC Typical Low-Power Transmitter Application 200k +9VDC Modulation Input C1 1 47 L1 A NC 5 Typical Application Circuits D 7 7 Low-Loss Matching Network to 50 NC NC 8 1 P INCIDENT P REFLECTED E C B 8 Connection (Antenna) 2 6 6 2 3 5 5 3 G 1 7 3 4 6 5 C2 4 4 2 8 ROXXXXC Bottom View F RF Bypass 470 Typical Local Oscillator Application Case Dimensions +VDC Dimension A B C D E F G Output 200k Min mm Nom 4.8 4.8 5.0 5.0 2.39 2.08 1.17 0.64 2.54 Max Min Inches Nom 5.2 5.2 1.7 0.189 0.189 0.197 0.197 0.094 0.082 0.046 0.025 0.100 2.69 C1 +VDC L1 Max 0.205 0.205 0.067 1 2 3 8 7 4 6 5 C2 ROXXXXC Bottom View RF Bypass 0.106 Equivalent LC Model Typical Test Circuit 0.05 pF* The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Co = Cp + 0.05 pF Cp Electrical Test Rm Lm *Case Parasitics Cm Temperature Characteristics 7 From 50 Network Analyzer 6 1 8 4 2 fC = f O , T C = T O To 50 Network Analyzer 0 3 0 -50 -50 -100 -100 -150 -150 (f-fo ) / fo (ppm) 5 The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. -200 -80 -60 -40 -20 -200 0 +20 +40 +60 +80 T = T C - T O ( C ) www.RFM.com E-mail: info@rfm.com (c)2008 by RF Monolithics, Inc. Page 2 of 2 RO3112C - 3/26/08