? 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. RO2043-012306 electrical characteristics characteristic sym notes minimum typical maximum units frequency (+25 c) nominal frequency f c 2, 3, 4, 5 303.775 303.975 mhz tolerance from 303.875 mhz d f c 100 khz insertion loss il 2, 5, 6 4.8 7.0 db quality factor unloaded q q u 5, 6, 7 11300 50 w loaded q q l 4600 temperature stability turnover temperature t o 6, 7, 8 37 52 67 c turnover frequency f o f c +8.2 khz frequency temperature coefficient ftc 0.037 ppm/c 2 frequency aging absolute value during the first year |fa| 1, 6 10 ppm/yr dc insulation resistance between any two pins 5 1.0 m w rf equivalent rlc model motional resistance r m 5, 6, 7, 9 74 124 w motional inductance l m 437.961 h motional capacitance c m .626346 ff pin 1 to pin 2 static capacitance c o 5, 6, 9 1.5 1.8 2.1 pf transducer static capacitance c p 5, 6, 7, 9 1.5 pf test fixture shunt inductance l test 2, 7 150 nh lid symbolization (in addition to lot and/or date codes) rfm RO2043 to39-3 case ? designed for 303.875 mhz saw resonator ? low series resistance ? quartz stability ? rugged, hermetic, low-profile to39 case ? complies with directive 2002/95/ec (rohs) the RO2043 is a true one-port, surface-acoustic-wave (saw) resonator in a low-profile to39 case. it pro- vides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at 303.825 mhz. the RO2043-1 is designed specitically for low-power am transmitters on remote-control and wireless alarm applications operating in the usa under fcc part15, in japan, in australia, in korea, and elsewhere. absolute maximum ratings rating value units cw rf power dissipation +5 dbm dc voltage between terminals (observe esd precautions) 30 vdc case temperature -40 to +85 c 303.875 mhz saw resonator RO2043 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 signifi- cantly in subsequent years. 2. the center 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 induc- tance, l test , is tuned for parallel resonance with c o at f c . typically, f oscilla- tor or f transmitter is less than the resonator f c . 3. one or more of the following united states patents apply: 4,454,488 and 4,616,197 and others pending. 4. typically, equipment designs utilizing this device require emissions testing and government approval, which is the responsibility of the equipment manufacturer. 5. unless noted otherwise, case temperature t c =+25c2c. 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 20c less than 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 pin1 and pin 2 measured at low fre- quency (10mhz) with a capacitance meter. the measurement includes case parasitic capacitance with a floating case. for usual grounded case applica- tions (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25pf to c o . pb
303.875 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. RO2043-012306 electrical connections this one-port, two-terminal saw resonator is bidirectional. the terminals are interchangeable with the exception of circuit board layout. typical test circuit the test circuit inductor, l test , is tuned to resonate with the static capaci- tance, c o at f c . typical application circuits temperature characteristics equivalent lc model the following equivalent lc model is valid near resonance: case design pin connection 1 terminal 1 2 terminal 2 3 case ground network analyzer network analyzer electrical test: 1 2 3 w w 50 w source at f c low-loss matching network 50 w to power test: p p incident incident cw rf power dissipation = - reflected reflected p p 3 2 1 mps-h10 +9vdc 47 rf bypass l1 c1 c2 200k w modulation input roxxxx bottom view 470 typical low-power transmitter application: 1 2 3 (antenna) +vdc rf bypass l1 c2 roxxxx bottom view typical local oscillator application: 1 2 3 output +vdc c1 dimensions millimeters inches min max min max a 9.40 0.370 b 3.18 0.125 c 2.50 3.50 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 1.02 0.040 j 1.40 0.055 the curve shown on the right accounts for resonator contri- bution only and does not in- clude oscillator temperature characteristics. -80 -60 -40 -20 0 +20 +40 +60 0 -50 -100 -150 +80 -200 0 -50 -100 -150 -200 f c = f o , t c = t o d t = t c - t o ( c ) (f-f o o ) / f (ppm) 0.5 pf* 0.25 pf* c p c o = + *case parasitics r l c 0.5 pf* c p 1 2 3 m m m b 45 j (2 places) d (3 places) h g e f c a bottom view pin 1 pin 2 pin 3
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