www.rfm.com e-mail: info@rfm.com page 1 of 2 ?2009 by rf monolithics, inc. ro3156d - 7/30/09 electrical characteristics characteristic sym notes minimum typical maximum units frequency, +25 c ro3156d f c 2, 3, 4, 5 868.750 869.150 mhz ro3156d-1 868.800 869.100 RO3156D-2 868.850 869.050 tolerance from 916.5 mh ro3156d ? f c 200 khz ro3156d-1 150 RO3156D-2 100 insertion loss il 2, 5, 6 1.20 2.5 db quality factor unloaded q q u 5, 6, 7 6300 50 ? loaded q q l 850 temperature stability turnover temperature t o 6, 7, 8 10 25 40 c turnover frequency f o fc mhz frequency temperature coefficient ftc 0.032 ppm/c 2 frequency aging absolute value during the first year |fa| 1 10 ppm dc insulation resistance between any two terminals 5 1.0 m ? rf equivalent rlc model motional resistance r m 5, 6, 7, 9 15.7 ? motional inductance l m 18.1 h motional capacitance c m 1.85 ff transducer static capacitance c o 5, 6, 9 2.2 pf test fixture shunt inductance l test 2, 7 15.2 nh lid symbolization ro3156d: 715, ro3156d-1: 924, RO3156D-2: 925 //ywws standard reel quantity reel size 7 inch 10 500 pieces / reel reel size 13 inch 3000 pieces / reel ? ideal for 868.95 mhz fcc part 15 transmitters very low series resistance quartz stability complies with directive 2002/95/ec (rohs) the ro3156d is a true one-port, surface-acoustic-wave (saw) resonator in a surface-mount ceramic case. it provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 868.95 mhz. this saw is designed specifically for remote-control and data-link transmitters operating in the under etsi en 300 220 regulations. absolute maximum ratings rating value units input power level 10 dbm dc voltage 12 vdc storage temperature -40 to +85 c soldering temperature, 10 seconds / 5 cycles maximum 260 c 868.95 mhz saw resonator ro3156d ro3156d-1 RO3156D-2 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 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 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 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 approximately equal to the specified resonator t o . 9. this equivalent rlc model approximates 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 (10 mhz) with a capacitance meter. the measurement includes parasitic capacitance with "nc? pads unconnected. case parasitic capacitance is approximately 0.05 pf. transducer parallel capacitance can by calculated as: c p c o -0.05pf. 10. tape and reel standard per ansi/eia 481. sm3838-6 case 3.8 x 3.8 pb
www.rfm.com e-mail: info@rfm.com page 2 of 2 ?2009 by rf monolithics, inc. ro3156d - 7/30/09 -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) 0.05 pf* 0.05 pf c p c o + = *case parasitics c p rm lm c m equivalent lc model temperature characteristics the curve shown on the right accounts for resonator contribution only and does not include lc component temperature contributions. pin connection 1nc 2 terminal 3nc 4nc 5 terminal 6nc power test electrical connections the saw resonator is bidirectional and may be installed with either orientation. the two terminals are interchangeable and unnumbered. the callout nc indicates no internal connection. the nc pads assist with mechanical positioning and stability. external grounding of the nc pads is recommended to help reduce parasitic capacitance in the circuit. typical test circuit the test circuit inductor, l test , is tuned to resonate with the static capacitance, c o , at f c . electrical test typical application circuits from 50 ? network analyzer to 50 ? network analyzer 2 3 6 5 4 1 low-loss matching network to 50 ? 50 ? source at f c p incident p reflected 2 3 6 5 4 1 modulation input roxxxxc bottom view 200k ? c1 l1 (antenna) 47 +9vdc c2 rf bypass 470 typical low-power transmitter application 2 3 6 5 4 1 +vdc roxxxxc bottom view 200k ? c1 l1 +vdc c2 rf bypass typical local oscillator application output 2 3 6 5 4 1 case dimensions dimension mm inches min nom max min nom max a 3.60 3.80 4.0 0.14 0.15 0.16 b 3.60 3.80 4.0 0.14 0.15 0.16 c 1.00 1.20 1.40 0.04 0.05 0.055 d 0.95 1.10 1.25 0.033 0.043 0.05 e 2.39 2.54 2.69 0.090 0.10 0.110 g 0.90 1.0 1.10 0.035 0.04 0.043 h 1.90 2.0 2.10 0.75 0.08 0.83 i 0.50 0.6 0.70 0.020 0.024 0.028 j 1.70 1.8 1.90 0.067 0.07 0.075 1 2 3 6 5 4 1 2 3 6 5 4 a bc d j e gh i
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