rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 1 of 2 rfm europe phone: 44 1963 251383 fax: 44 1963 251510 http://www.rfm.com ?1999 by rf monolithics, inc. the stylized rfm logo are registered trademarks of rf monolithics, inc. RO2180B-111601 electrical characteristics characteristic sym notes minimum typical maximum units frequency (+25 c) nominal frequency f c 2, 3, 4, 5 433.845 433.92 433.995 mhz tolerance from 433.92 mhz df c 75 khz insertion loss il 2, 5, 6 2 db quality factor unloaded q q u 5, 6, 7 11,535 50 w loaded q q l 1,811 temperature stability turnover temperature t o 6, 7, 8 25 c turnover frequency f o f c+ 16 frequency temperature coefficient ftc 0.032 ppm/c 2 frequency aging absolute value during the first year |fa| 1 10 ppm/yr dc insulation resistance between any two terminals 5 1.0 m w rf equivalent rlc model motional resistance r m 5, 6, 7, 9 18.63 w motional inductance l m 78.79 h motional capacitance c m 1.71 ff shunt static capacitance c o 5, 6, 7, 9 1.82 pf test fixture shunt inductance l test 2, 7 63.13 nh lid symbolization (in addition to lot and/or date code) 295 sm5248-8 case ? very low series resistance ? quartz stability ? surface-mount, solder seal package with 4.8 x 5.2mm footprint the RO2180B is a true one-port, surface-acoustic-wave (saw) resonator in a surface-mount ceramic case. it provides reliable, fundamental-mode, quartz frequency stabilization. absolute maximum ratings rating value units cw rf power dissipation +0 dbm dc voltage between terminals (observe esd precautions) 30 vdc case temperature -40 to +85 c soldering temperature +250 c 433.92 mhz saw resonator RO2180B caution: electrostatic sensitive device. observe precautions for handling. notes: 1. frequency aging is the change in f c 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 subse- quent years. 2. the frequency, f c , is measured at the minimum insertion loss point, il min , with the resonator in the 50 w test system (vswr 1.2:1). the shunt inductance, l test , is tuned for parallel resonance with c o at f c . typically, f oscillator or f transmitter is approximately equal to the resonator f c . 3. one or more of the following united states patents apply: 4,454,488 and 4,616,197. 4. typically, equipment utilizing this device requires emissions testing and govern- ment approval, which is the responsibility of the equipment manufacturer. 5. unless noted otherwise, case temperature t c =+25c5c. 6. the design, manufacturing process, and specifications of this device are subject to change without notice. 7. derived mathematically from one or more of the following directly measured parameters: f c , il, 3db bandwidth, f c versus t c , and c o . 8. turnover temperature, t o , is the temperature of maximum (or turnover) fre- quency, f o . the nominal frequency at any case temperature, t c , may be calcu- lated from: f=f o [1-ftc(t o -t c ) 2 ]. typically, oscillator t o is approximately equal to the specified resonator t o . 9. this equivalent rlc model approximates resonator performance near the reso- nant frequency and is provided for reference only. the capacitance c o is the static (nonmotional) capacitance between the two terminals measured at low frequency (10mhz) with a capacitance meter. the measurement includes para- sitic capacitance with ?nc? pads unconnected. case parasitic capacitance is approximately 0.05pf. transducer parallel capacitance can be calculated as: c p ? c o - 0.05pf.
433.92 mhz saw resonator rf monolithics, inc. phone: (972) 233-2903 fax: (972) 387-8148 e-mail: info@rfm.com page 2 of 2 rfm europe phone: 44 1963 251383 fax: 44 1963 251510 http://www.rfm.com ?1999 by rf monolithics, inc. the stylized rfm logo are registered trademarks of rf monolithics, inc. RO2180B-111601 electrical connections this one-port, eight-terminal solder seal resonator is bidirectional. howev- er, impedances and circuit board parasitics may not be symmetrical, requir- ing slightly different oscillator component-matching values. typical circuit case design pin connection 1 ground 2 input or output 3 ground 4 ground 5 ground 6 output or input 7 ground 8 ground 5 6 7 4 8 3 2 1 input or output input or output 1, 3, 4, 5, 7, 8 no internal connection dimensions millimeters inches min nom max min nom max a 5.21 5.33 5.46 0.205 0.210 0.215 b 4.83 4.95 5.08 0.190 0.195 0.200 c 0.38 0.51 0.64 0.015 0.020 0.025 d 1.07 1.19 1.32 0.042 0.047 0.052 e 1.14 1.27 1.40 0.045 0.050 0.055 f 0.58 0.71 0.84 0.023 0.028 0.033 g 1.07 1.19 1.32 0.042 0.047 0.052 h 1.32 1.45 1.57 0.052 0.057 0.062 i 2.54 2.67 2.79 0.100 0.105 0.110 j 1.52 1.78 2.03 0.060 0.070 0.080 45 c b a d f g i h e 3 2 4 7 8 5 6 1 top view bottom view j
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