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(R) * * * * Ideal for European 868.95 MHz Transmitters Very Low Series Resistance Quartz Stability Complies with Directive 2002/95/EC (RoHS) RO2156D RO2156D-1 RO2156D-2 Pb The RO2156D is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 868.95 MHz. This SAW is designed specifically for remote-control and wireless security transmitters operating under ETSI-ETS 300 220 in Europe and under FTZ 17 TR 2100 in Germany. 868.95 MHz SAW Resonator Absolute Maximum Ratings Rating Input Power Level DC Voltage Storage Temperature Soldering Temperature (10 seconds / 5 cycles max.) Value 10 12 -40 to +85 260 Units dBm VDC C C SM3838-6 Case 3.8 X 3.8 Electrical Characteristics Characteristic Frequency at +25C Nominal Frequency RO2156D RO2156D-1 RO2156D-2 Tolerance from 868.95 MHz RO2156D RO2156D-1 RO2156D-2 Insertion Loss Quality Factor Temperature Stability Unloaded Q 50 Loaded Q Turnover Temperature Turnover Frequency Frequency Temperature Coefficient Frequency Aging RF Equivalent RLC Model Absolute Value during the First Year Motional Resistance Motional Inductance Motional Capacitance Shunt Static Capacitance Lid Symbolization (in Addition to Lot and/ or Date Code) Standard Reel Quanitity DC Insulation Resistance between Any Two Terminals RM LM CM CO 5, 6, 7, 9 5, 6, 7, 9 IL QU QL TO fO FTC |fA| 1 5 1.0 15 50 0.7 2.3 433 / YWWD 3000 Pieces / Reel 6,7,8 2,5,6 5,6,7 20,000 2,400 10 25 fC 0.032 <10 40 C kHz ppm/C2 ppm/yr M H fF pF 1.1 fC -75 fC 2,3,4,5 Sym Notes Minimum 868.875 868.875 868.850 Typical Maximum 869.025 869.175 869.050 75 +225 100 2.0 dB kHz MHz Units CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes: 1. 2. Lifetime (10 year) frequency aging. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25C2C for all specifications. The design, manufacturing process, and specifications of this device are subject to change without notice. 7. 8. Derived mathematically from one or more of the following directly measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. Turnover temperature, TO, is the temperature of maximum (or turnover) frequency, fO. The nominal frequency at any case temperature, TC, may be calculated from: f = fO [1 - FTC (TO -TC)2]. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance CO 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 0.05pF. Transducer parallel capacitance can be calculated as: CP C - 0.05 pF. E-mail: info@rfm.com Page 1 of 2 http://www.rfm.com RO2156D_RO2156D-1_RO2156D-2 _090503 3. 4. 5. 6. 9. RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. 868.95 MHz 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. Pin 1 2 3 4 5 6 SAW Resonator Connection NC Terminal NC NC Terminal NC Power Test P INCIDENT 50 Source at F C P REFLECTED Low-Loss Matching Network to 50 1 6 2 3 5 4 Typical Application Circuits B 1 6 6 1 Modulation Input C G H Typical Low-Power Transmitter Application 200k C1 L1 (Antenna) +9VDC 47 A2 5 E 5 2 I 2 3 4 3 4 3 6 1 5 4 C2 D J ROXXXXC Bottom View RF Bypass 470 Typical Local Oscillator Application Output Case Dimensions Dimension A B C D E G H I J Min 3.60 3.60 1.00 0.95 2.39 0.90 1.90 0.50 1.70 mm Nom 3.80 3.80 1.20 1.10 2.54 1.0 2.0 0.6 1.8 Max 4.0 4.0 1.40 1.25 2.69 1.10 2.10 0.70 1.90 Min 0.14 0.14 0.04 0.037 0.090 0.035 0.75 0.020 0.067 Inches Nom 0.15 0.15 0.05 0.043 0.10 0.04 0.08 0.024 0.07 Max 0.16 0.16 0.055 0.05 0.110 0.043 0.83 0.028 0.075 200k +VDC C1 L1 +VDC 1 6 2 3 5 4 C2 ROXXXXC Bottom View RF Bypass Equivalent LC Model 0.05 pF* Co = Cp + 0.05 pF Cp *Case Parasitics Typical Test Circuit The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO, at FC. Electrical Test Rm Lm Cm Temperature Characteristics The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions. fC = f O , T C = T O 6 1 0 2 0 -50 -100 -150 -200 0 +20 +40 +60 +80 From 50 Network Analyzer 5 To 50 Network Analyzer 4 3 (f-fo ) / fo (ppm) -50 -100 -150 -200 -80 -60 -40 -20 T = TC - T O ( C ) RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: info@rfm.com Page 2 of 2 http://www.rfm.com RO2156D_RO2156D-1_RO2156D-2 _090503 |
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