electrical connections this two-port, three-terminal saw resonator is bidirectional. however, impedances and circuit board parasitics may not be symmetrical, requiring slightly different oscillator component- matching values. typical test circuit typical application circuits equivalent lc model the following equivalent lc model is valid near resonance: temperature characteristics typical frequency response 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 1 3 2 2 3 1 from 50 network analyzer w to 50 network analyzer w electrical test 1 2 3 conventional two-port design: simulated one-port design: this saw resonator can be used in oscillator or transmitter de- signs that require 180 phase shift at resonance in a two-port configuration. one-port resonators can be simulated, as shown, by connecting pins 1 and 2 together. however, for most low-cost consumer products, this is only recommended for ret- rofit applications and not for new designs. dimensions millimeters inches min max min max a 9.30 0.366 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 -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) the curve shown on the right accounts for resona- tor contribution only and does not include lc com- ponent temperature con- tributions. -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 200.0 100.0 0.0 -100.0 -200.0 -300.0 -400.0 -500.0 -600.0 -700.0 -800.0 901.2 905.2 909.2 913.2 917.2 921.2 925.2 929.2 frequency (mhz) s21 magn.(db) s21 phase (deg.) b 45 j (2 places) d (3 places) h g e f c a case design the plot shown below is a typical frequency response for the rp series of two-port resonators. the plot is for rp1094. c m c o c o r m l m 1 2 3 pin connection 1 input or output 2 output or input 3 case ground 22 bottom view pin 1 pin 2 pin 3 rp series to39 two-port saw resonators
rating value units cw rf power dissipation (see: typical test circuit) +0 dbm dc voltage between any two pins (observe esd precautions) 30 vdc case temperature -40 to +85 c typical test circuit typical application circuits simulated one-port design: conventional two-port design: equivalent lc model temperature characteristics typical circuit board land pattern the circuit board land pattern shown below is one possible de- sign. 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 ca- pacitance. trace lengths from terminal lands to oth- er components should be short and wide to minimize parasitic series inductanc- es. case design sm-4a pin connection 1 input or output 2 output or input 3 case ground 4 case ground w w electrical test: + + dimensions sm-4a inches millimeters nominal nominal a 0.205 5.21 b 0.265 6.73 c 0.078 1.98 d 0.071 1.80 e 0.057 1.45 f 0.150 3.81 g 0.050 1.27 h 0.075 1.91 c m c o c o r m l m 1 2 3 & 4 -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) the curve shown on the right accounts for resonator contribution only and does not in- clude lc component temperature contribu- tions. electrical connections this two-port, three-terminal saw resonator is bidirectional. however, impedances and circuit board parasitics may not be symmetrical, requiring slightly different oscillator component- matching values. absolute maximum ratings 23 50 w source at f c incident p reflected p low-loss matching network to 50 w cw rf power dissipation = incident p reflected p - power test: rp series sm-4a two-port saw resonators
rp two-port 180 saw resonators (all parameters measured in 50 w system) ro and rp series 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 frequency f c is the frequency of minimum il with the resonator in the specified test fixture in a 50 w test system with vswr 1.2:1. typically, f oscillator or f transmitter is less than the resonator f c . |f a | is typically 10ppm/ year. 3) one or more of the following united states patents apply: 4,454,488; 4,616,197, and others pending. 4) typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibil- ity of the equipment manufacturer. 5) unless noted otherwise, case temperature t c = +25c 5c 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 20 less than the specified resonator t o . 9a) this equivalent rlc model approximates ro surface mount resonator performance near the resonant frequency and is part number resonant freq. at 25c insertion loss (db) quality factor ratings temperature stability absolute f c (mhz) tolerance d d f c (khz) typ. max unloaded q 50 w loaded q cw rf power dissipa- tion (dbm) turnover temp. t o (c) turnover freq. f o (khz) value min. typ. max. typ. notes 2, 3, 4, 5 2, 5, 6 5, 6, 7 6, 7, 8 rp1234 293.075 100 13.1 18.0 12,000 9,400 +5 38 53 68 f c +8.5 rp1098 307.3 100 11.0 18.0 13,000 9,600 +5 33 48 63 f c +6 rp1053 310.0 250 14 18 4,000 3,200 0 47 62 77 f c rp1239 315.0 75 5.3 8.5 18,000 8,100 0 37 52 67 f c +8.5 rp1238 407.3 100 5.4 8.0 13,700 6,300 0 43 58 73 f c +16 rp1237 418.0 75 5.7 8.0 13,600 6,500 0 47 62 77 f c +21 rp1237-1 418.05 75 5.7 8.0 13,600 6,500 0 47 62 77 f c +21 rp1298 423.22 100 5.2 8.0 15,200 6,900 0 24 39 54 f c +2.6 rp1207-5 433.92 75 8.2 10.0 12,700 7,800 +5 40 55 70 f c +14 rp1308 433.92 75 6.3 8.0 12,000 6,300 0 36 51 66 f c +11 rp1102 905.5 250 9.5 15.0 6,000 3,500 +5 44 59 74 f c +39 rp1286 906.0 100 7.1 10.0 6,600 3,700 +5 16 31 46 f c +1 rp1261 913.612 212 8.2 10.0 6,500 4,000 +5 23 38 53 f c +5.7 rp1094 915.0 150 8.5 15.0 6,100 3,700 +5 53 68 83 f c +63 rp1285 916.55 150 7.5 10.0 6,500 3,800 +5 23 38 53 f c +5 RP1103 924.5 250 11.1 15.0 6,000 3,800 +5 34 49 64 f c +6 rp series 24
provided for reference only. the capacitance c o is the static (nonmotional) capacitance between the two terminals mea- sured at low frequency (10mhz) with a capacitance meter. the measurement includes parasitic capacitance with ?nc? pads unconnected. case parasitic capacitance is approximately 0.05pf. transducer parallel capacitance can be calcu- lated as: c p ? c o -0.05pf. 9b) this equivalent rlc model approximates ro to39 resonator performance near the resonant 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 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 0.25pf to c o . 9c) this equivalent rlc model approximates rp to39 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 includes case parasitic capacitance. 10) the typical ftc for to-39 resonators is 0.037 ppm/c 2 and the typical ftc for smrs is 0.032ppm/c 2 . 11) the dc insulation resistance between any two pins is a minimum of 1m w . 12) the dc voltage between any two pins (observe esd precautions) is 30 vdc. 13) the case temperature is rated between -40 to +85c. 14) soldering temperature is +250c. 15) maximum nominal insertion phase shift at resonance is 180 for the rp series. part number (cont). rf equivalent rlc model packaging lid symbol application - for reference only motional res. r m ( w w ) motional cap. c m (ff) motional ind. l m (h) shunt static cap. c o (pf) case style typ. circuit and freq. (mhz) nom. radio freq. (mhz) typ. max typ. typ. min. typ. max. notes 5, 6, 7, 9 rp1234 352 695 0.127215 2.31659 1.0 1.3 1.6 to39 p1234 293.125 lo 303.825 rp1098 256 695 0.134251 1.99801 1.0 1.3 1.6 to39 p1098 307.25 lo 318 rp1053 352 695 0.125 2100 1.0 1.3 1.6 to39 334-a025 310.0tx 310.0 rp1239 84 167 0.336771 758.027 1.9 2.2 2.5 to39 p1239 315.00 tx 315.00 rp1238 86 152 0.330391 462.150 2.1 2.4 2.7 to39 p1238 407.30 lo 418.00 rp1237 93 152 0.303334 477.932 2.0 2.3 2.6 to39 p1237 418.00tx 418.00 rp1237-1 93 152 0.305206 474.887 2.0 2.3 2.6 to39 1237-1 418.00 tx 418.00 rp1298 82 152 0.297547 475.283 2.2 2.5 2.8 to39 p1298 423.22 lo 433.92 rp1207-5 157 216 0.183245 734.159 1.4 1.7 2.0 to39 1207-5 433.92 tx 433.92 rp1308 107 152 0.279470 481.378 1.4 1.7 2.0 to39 p1308 433.92 tx 433.92 rp1102 198 463 0.106865 289.086 1.0 1.3 1.6 to39 p1102 905.5 tx 905.5 rp1286 126 216 0.208528 147.985 1.6 1.9 2.2 to39 p1286 905.80 lo 916.50 rp1261 157 217 0.171332 177.124 1.4 1.7 2.0 to39 p1261 913.50 tx 913.50 rp1094 166 463 0.158119 191.3434 1.1 1.4 1.7 to39 p1094 914.95 tx 915 rp1285 137 217 0.194528 155.005 1.7 2.0 2.3 to39 p1285 916.50 tx 916.50 RP1103 259 463 0.118860 249.340 1.1 1.4 1.7 to39 p1103 924.5 tx 924.5 rp series rp two-port 180 saw resonators (all parameters measured in 50 w system) 25
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