RO2165A RO2165A-1 RO2165A-2 858.25 MHz SAW Resonator ® • • • • • Ideal for European 858.25 MHz Transmitters Very Low Series Resistance Quartz Stability Surface-Mount Ceramic Case with 21 mm2 Footprint Complies with Directive 2002/95/EC (RoHS) The RO2165A 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 local oscillators operating at 858.25 MHz. This SAW is designed for remote-control and wireless security receivers operating under ETSI-ETS 300 220 in Europe and under FTZ 17 TR 2100 in Germany Absolute Maximum Ratings Rating Value Units +0 dBm CW RF Power Dissipation DC Voltage Between Terminals Case Temperature ±30 VDC -40 to +85 °C 260 °C Soldering Temperature (10 seconds / 5 cycles max.) SM-2 Case Electrical Characteristics Characteristic Sym Frequency (+25 °C) Nominal Frequency Notes RO2165A fC RO2165A-1 RO2165A-2 Tolerance from 858.25 MHz 2, 3, 4, 5 RO2165A ∆fC RO2165A-1 Minimum Typical 858.175 858.475 858.150 858.350 -75 +225 kHz 2.0 dB 45 °C Frequency Aging IL ±75 2, 5, 6 Unloaded Q QU 50 Ω Loaded Q QL Turnover Temperature TO Turnover Frequency fO 38,997 4,000 15 30 fC 6, 7, 8 Frequency Temperature Coefficient FTC Absolute Value during the First Year |fA| ppm/°C2 ppm/yr 0.032 1 5 Motional Resistance RM Motional Inductance LM Motional Capacitance CM Shunt Static Capacitance CO 5, 6, 9 LTEST 2, 7 Test Fixture Shunt Inductance 1.1 5, 6, 7 DC Insulation Resistance between Any Two Terminals RF Equivalent RLC Model MHz ±100 Insertion Loss Temperature Stability Units 858.325 RO2165A-2 Quality Factor Maximum 858.175 10 1.0 5, 7, 9, 6 MΩ 11 Ω 82.654 µH 0.4161 2.6 Lid Symbolization (in Addition to Lot and/ or Date Code) 2.9 11.8581 fF 3.2 pF nH 261 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 subject to change without notice. 7. 8. 9. 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. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 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] Page 1 of 2 http://www.rfm.com RO2165A_RO2165A-1_RO2165A-2_071001 858.25 MHz SAW Resonator Equivalent LC Model 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 0.05 pF* Co = Cp + 0.05 pF NC NC Cp *Case Parasitics Terminal Rm Lm Cm Temperature Characteristics The curve shown on the right accounts for resonator contri- The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. bution only and does not include LC component temperature contributions. ELECTRICAL TEST Network Analyzer 0 -50 -50 -100 -100 -150 -150 -200 -80 -60 -40 -20 Typical Circuit Board Land Pattern To 50 Ω From 50 Ω Network Analyzer fC = f O , T C = T O 0 (f-fo ) / fo (ppm) Typical Test Circuit -200 0 +20 +40 +60 +80 ∆T = T C - T O ( °C ) 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. (4 Places) Typical Dimension: 0.010 to 0.047 inch (0.25 to 1.20 mm) Case Design The case material is black alumina with contrasting symbolization. All pads are nominally centered with respect to the base and consist of 40 to 70 microinches electroless gold on 60-350 micorinches electroless nickel. Typical Application Circuits Typical Low-Power Transmitter Application +9VDC Modulation Input 200k Ω 47 C1 L1 (Antenna) C2 ROXXXXA Bottom View Millimeters RF Bypass 470 A Typical Local Oscillator Application Output +VDC C1 ROXXXXA Bottom View Inches Dimensions +VDC L1 C2 RF Bypass RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 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 Max Min Max 5.74 5.99 0.226 0.236 B 3.73 3.99 0.147 0.157 C 1.91 2.16 0.075 0.085 D 0.94 1.10 0.037 0.043 E 0.83 1.20 0.033 0.047 F 1.16 1.53 0.046 0.060 G 0.94 1.10 0.037 0.043 H 0.43 0.59 0.017 0.023 K 0.43 0.59 0.017 0.023 M 5.08 5.33 0.200 0.210 N 0.38 0.64 0.015 0.025 P 3.05 3.30 0.120 0.130 E-mail: [email protected] Page 2 of 2 http://www.rfm.com RO2165A_RO2165A-1_RO2165A-2_071001