saw resonator LGER433A the LGER433A is a true one- port surface- acoustic- wave( saw) re sonator in a low- profile qcc8c case. it provides reliable fundamental- mode quartz frequency stabilization of fixed- frequency transmitters operating at 433.920 mhz. 1. package dimension (qcc8c) 2. marking 3.equivalent lc model and test circuit r433a color: black or blue 4. typical application circuit 1) typical low-power transmitter application 2) typical local oscillator application 5. typical frequency response 6.temperature characteristics pin configuration 2 terminal1 6 terminal2 4,8 case ground 1,3,5,7 empty sign data (unit: mm) sign data (unit: mm) a 2.08 e 1.2 b 0.6 f 1.35 c 1.27 g 5.0 d 2.54 h 5.0
saw resonator LGER433A 7. performance 7-1.maximum rating rating value units cw rf power dissipation +10 dbm dc voltage between any two pins 30v vdc operating temperature -40 to +85 7-2.electronic characteristics characteristic sym minimum typical maximum units center frequency (+25 ) absolute frequency f c 433.845 433.995 mhz tolerance from 433.920 mhz ? f c 75 khz insertion loss i l 1.5 db quality factor unloaded q q u 15,974 50 ? loaded q q l 1,900 temperature stability turnover temperature t o 25 40 55 turnover frequency f o fc khz frequency temperature coefficient ftc 0.037 ppm/ 2 frequency aging absolute value during the first year |f a | 10 ppm/yr dc insulation resistance between any two pins 1.0 m ? rf equivalent rlc model motional resistance r m 19 ? motional inductance l m 79.137 h motional capacitance c m 1.8019 ff pin 1 to pin 2 static capacitance c o 1.9 pf caution: electrostatic sensitive device. observe precautions for handling! notes: 1. frequency aging is the change in f c with time and is specified at +65 or less. aging may exce ed the specification for prolonged temperatures above +65 . typically, aging is greatest the first year after manufacture, decreasing in subsequent years. 2. the center frequency, f c ,is the frequency of minimum il with the res onator in the specified test fixture in a 50 ? test system with vswr 1.2 : 1. typically, f oscillator or f transmitter is less than the resonator f c . 3. typically, equipment utilizing this device r equires emissions testing and government approval, which is the responsibility of the equipment manufacturer. 4. unless noted otherwise , case temperature t c =+25 2 . 5. the design, manufacturing pr ocess, and specifications of this devic e are subject to change without notice. 6 .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 . 7. turnover temperature, t o , is the temperature of maximum (or turnover) frequency, f o, the nominal center 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 20 less than the specified resonator t o . 8. this equivalent rlc model approxim ates resonator performance near the resonant frequency and is provided for reference only . the capacitance c o is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground .the measurement inclu des 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 .
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