www.rfm.com e-mail: info@rfm.com page 1 of 2 ?2008 by rf monolithics, inc. RO2101 - 3/25/08 electrical characteristics characteristic sym notes minimum typical maximum units center frequency (+25 c) absolute frequency f c 2, 3, 4, 5 433.845 433.995 mhz tolerance from 433.920 mhz f c 75 khz insertion loss il 2, 5, 6 1.5 2.0 db quality factor unloaded q q u 5, 6, 7 12,800 50 loaded q q l 2,000 temperature stability t urnover temperature t o 6, 7, 8 24 39 54 c turnover frequency f o f c + 2.7 khz frequency temperature coefficient ftc 0.037 ppm/c 2 frequency aging absolute value during the first year |f a | 1 10 ppm/yr dc insulation resistance between any two pins 5 1.0 m rf equivalent rlc model motional resistance r m 5, 7, 9 18 26 motional inductance l m 86.0075 h motional capacitance c m 1.56417 ff pin 1 to pin 2 static capacitance c o 5, 6, 9 1.7 2.0 2.3 pf transducer static capacitance c p 5, 6, 7, 9 1.7 pf test fixture shunt inductance l test 2, 7 78 nh lid symbolization (in addition to lot and/or date codes) rfm RO2101 to39-3 case ? ideal for 433.92 mhz transmitters ? very low series resistance ? quartz stability ? rugged, hermetic, low-profile to39 case ? complies with directive 2002/95/ec (rohs) the RO2101 is a true one-port, surfac e-acoustic-wave (saw) resonator in a low-profile to39 case. it provides reliable, fundamental-mode, quartz frequen cy stabilization of fixed-fr equency transmitters operating at 433.92 mhz. the RO2101 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 cw rf power dissipation +0 dbm dc voltage between any two pins 30 vdc case temperature -40 to +85 c soldering temperature (10 seconds / 5 cycles max.) 260 c 433.92 mhz saw resonator RO2101 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 tem- peratures above +65c. typically, agi ng is greatest the first year after manufacture, decreasing significantly 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 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 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, 3 db bandwidth, f c versus t c , and c o . 8. turnover temperature, t o , is the temperature of maximum (or turnover) frequency, f o . the nominal frequency at any case temperature, t c , may be calculated 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 approx imates resonator performance near the resonant frequency and is provided for reference only. the capacitance c o is the static (nonmotional) capacitance between pin1 and pin 2 measured at low frequency (10 mhz) with a capacitance meter. the measurement includes case parasitic capacitance with a floating case. for usual grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pf to c o . pb
www.rfm.com e-mail: info@rfm.com page 2 of 2 ?2008 by rf monolithics, inc. RO2101 - 3/25/08 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 capacitance, 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 50 source at f c low-loss matching network 50 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 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 j1.40 0.055 the curve shown on the right accounts for resonator contribution only and does not include 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 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 mm 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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