RO3101A

RO3101A • • • • • Ideal for European 433.92 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-Mount Ceramic Case Complies with Directive 2002/95/EC (RoHS) Pb The RO3101A 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. 433.92 MHz SAW Resonator Absolute Maximum Ratings Rating CW RF Power Dissipation (See: Typical Test Circuit) DC voltage Between Terminals (Observe ESD Precautions) Case Temperature Soldering Temperature (10 seconds / 5 cycles max.) Value +0 ±30 -40 to +85 260 Units dBm VDC °C °C SM5035-4 Electrical Characteristics Characteristic Center Frequency (+25 °C) Insertion Loss Quality Factor Temperature Stability Unloaded Q 50 Ω Loaded Q Turnover Temperature Turnover Frequency Frequency Temperature Coefficient Frequency Aging RF Equivalent RLC Model Absolute Value during the First Year Motional Resistance Motional Inductance Motional Capacitance Shunt Static Capacitance Test Fixture Shunt Inductance Lid Symbolization (in addition to Lot and/or Date Codes) DC Insulation Resistance between Any Two Terminals RM LM CM CO LTEST 5, 6, 9 2, 7 5, 7, 9 Absolute Frequency Tolerance from 433.920 MHz Sym fC ΔfC IL QU QL TO fO FTC |fA| Notes 2,3,4,5 2,5,6 5,6,7 Minimum 433.845 Typical Maximum 433.995 ±75 Units MHz kHz dB 1.5 9000 1458 10 25 fC 0.032 ≤10 1.0 19.4 63.8 2.11 2.4 55.1 655 // YWWS 2.2 40 °C ppm/°C2 ppm/yr MΩ Ω µH fF pF nH 6,7,8 1 5 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 +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 in subsequent years. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 Ω 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 = +25°C±2°C. The design, manufacturing process, and specifications of this device are 7. 8. 9. 10. 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. Tape and Reel standard per ANSI / EIA 481. www.RFM.com E-mail: info@rfm.com ©2008 by RF Monolithics, Inc. Page 1 of 2 RO3101A - 3/26/08 Electrical Connections 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. Terminal Case Ground Case Ground Equivalent LC Model 0.05 pF* Co = Cp + 0.05 pF Cp *Case Parasitics Terminal Rm Lm Cm Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. fC = f O , T C = T O 0 (f-fo ) / fo (ppm) 0 -50 -100 -150 -200 0 +20 +40 +60 +80 -50 -100 ELECTRICAL TEST From 50 Ω Network Analyzer To 50 Ω Network Analyzer -150 -200 -80 -60 -40 -20 Typical Circuit Land Pattern Board POWER TEST P INCIDENT The circuit board land pattern shown below is one possible design. The optimum land pattern is dependent on the circuit board assembly process which varies by manufacturer. The distance between adjacent land edges should be at a maximum to minimize parasitic capacitance. Trace lengths from terminal lands to other components should be short and wide to minimize parasitic series inductances. ΔT = T C - T O ( °C ) (4 Places) Low-Loss Matching Network to 50 Ω Terminal NC NC Terminal 50 Ω Source P at F C REFLECTED Typical Dimension: 0.010 to 0.047 inch (0.25 to 1.20 mm) Case Design CW RF Power Dissipation = P INCIDENT - P REFLECTED Typical Application Circuits Top View B Side View C Bottom View E (3x) Typical Low-Power Transmitter Application +9VDC 200k Ω Modulation Input C1 47 L1 (Antenna) 3 2 1 A 4 F (4x) C2 RO3XXXA Bottom View 470 RF Bypass D G (1x) Typical Local Oscillator Applications Output +VDC C1 L1 C2 RO3XXXA Bottom View RF Bypass +VDC Millimeters Dimensions Min A B C D E F G 4.87 3.37 1.45 1.35 .67 .37 1.07 Inches Max 5.13 3.63 1.60 1.50 .93 .63 1.33 Nom 5.0 3.5 1.53 1.43 .80 .50 1.20 Min .191 .132 .057 .040 .026 .014 .042 Nom .196 .137 .060 .057 .031 .019 .047 Max .201 .142 .062 .059 .036 .024 .052 www.RFM.com E-mail: info@rfm.com ©2008 by RF Monolithics, Inc. Page 2 of 2 RO3101A - 3/26/08