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©2008 by RF Monolithics, Inc. RO3101 - 3/26/08
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Center Frequency (+25 °C) Absolute Frequency fC2, 3, 4, 5 433.845 433.995 MHz
Tolerance from 433.920 MHz ΔfC±75 kHz
Insertion Loss IL 2, 5, 6 1.5 2.0 dB
Quality Factor Unloaded Q QU5, 6, 7 7400
50 Ω Loaded Q QL900
Temperature Stability Turnover Temperature TO6, 7, 8
10 25 40 °C
Turnover Frequency fOfc + 2.7 kHz
Frequency Temperature Coefficient FTC 0.037 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA|1≤10 ppm/yr
DC Insulation Resistance between Any Two Pins 5 1.0 MΩ
RF Equivalent RLC Model Motional Resistance RM5, 7, 9
13.7 Ω
Motional Inductance LM37.1 µH
Motional Capacitance CM3.6 fF
Pin 1 to Pin 2 S tatic Capacitance CO5, 6, 9 2.7 pF
Transducer Static Capacitance CP5, 6, 7, 9 2.5 pF
Test Fixture Shunt Inductance LTEST 2, 7 50.0 nH
Lid Symbolization (in Addition to Lot and/or Date Codes) RFM RO3101
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 RO3101 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It
provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating
at 433.92 MHz. The RO3101 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
RO3101
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or
less. Aging may exceed the specification for prolonged tempera tures
above +65°C. Typically, aging is greatest the first year after manufacture,
decreasing significantly in subsequent years .
2. The center frequency, fC, is measured at the minimum insertion loss poi nt,
ILMIN, with the res onator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for paralle l resonance with CO at fC.
Typ ica lly, fOSCILLATOR or fTRANSMITTER is less than the resonator fC.
3. One or more of the following United State s patents appl y: 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 respo nsibility of the equipmen t
manufacturer.
5. Unless noted otherwise, case temperature TC= +25°C±2°C.
6. The design, manufact uring process, and specifications of this device are
subject to change without notice.
7. Derived mat hematicall y fr om one or more of the follo wing directly
measured parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover)
frequenc y, fO. The n ominal f requency at any case tempera ture, T C, may be
calculated from: f = fO[1 - FTC (TO-TC)2]. Typically, oscillator TO is 20°C
less than the specified resonator TO.
9. This equiv alent RLC model approximates reso nator performance near the
resonan t frequen cy and is provided for refer ence o nly. The ca pacit ance CO
is the static (nonmotional) capacitance bet ween pin1 and pin 2 meas ured
at low frequency (10 MHz) with a capacitance meter. The measurement
includes case parasi tic capacitance with a floating cas e. For usual
ground ed case ap plications (with ground connected to either pin 1 or pin 2
and to the case), add approximately 0.25 pF to CO.
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