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© 2008-2011 by RF Monolithics, Inc. RO3101A - 6/28/11
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 ∆fC±75 kHz
Insertion Loss IL 2,5,6 1.5 2.2 dB
Quality Factor Unloaded Q QU5,6,7 9000
50 Ω Loaded Q QL1458
Temperature Stability Turnover Temperature TO6,7,8 10 25 40 °C
Turnover Frequency fOfC
Frequency Temperature Coefficient FTC 0.032 ppm/°C2
Frequency Aging Absolute Value during the First Year |fA|1≤10 ppm/yr
DC Insulation Resistance between Any Two Terminals 5 1.0 MΩ
RF Equivalent RLC Model Motional Resistance RM5, 7, 9 19.4 Ω
Motional Inductance LM63.8 µH
Motional Capacitance CM2.11 fF
Shunt Static Capacitance CO5, 6, 9 2.4 pF
Test Fixture Shunt Inductance LTEST 2, 7 55.1 nH
Lid Symbolization (in addition to Lot and/or Date Codes) 655 // YWWS
• Ideal for European 433.92 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Surface-mount Ceram ic Case
• Complies with Directive 2002/95/EC (RoHS)
The RO3101A is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.
It provides reliable, fundamental-mode, qua rtz frequency stabilization of fix ed-frequency transm itters
operating at 433.92 MHz. This SAW is designed specifically for remote control and wireless security
transmitters operating in Europe under ETSI I-ETS 300 220.
Absolute Maximum Ratings
Rating Value Units
CW RF Power Dissipation (See: Typical Test Circuit) +0 dBm
DC Voltage Between Terminals (Observe ESD Precautions) ±30 VDC
Case Temperature -40 to +85 °C
Soldering Temperature (10 seconds / 5 cycles maximum) 260 °C
433.92 MHz
SAW
Resonator
RO3101A
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency agin g is the chang e in fC with time an d is specif ied at +6 5 °C or
less. Aging may exceed the specification for prolonged temperatures
above +65 °C. Typically, aging is greatest the first year after manufacture,
decreasing in subsequent years .
2. The center frequency, fC, is measured at the minimum insertion loss point,
ILMIN, with the res onator in the 50 Ω test system (VSWR ≤ 1.2:1). The
shunt inductance, LTEST, is tuned for paralle l res onance with CO at fC.
Typi cally, fOSCILLATOR or fTRANSMITTER is approximately equal to the
resonator fC.
3. One or more of the following United Sta tes patents apply: 4,454,488 and
4,616,197.
4. Typically, equipment utilizing this dev ic e requires emissions testing and
government app roval, which is the responsibilit y of the equipment
manufacturer.
5. Unless noted otherwise, case temperature TC=+25 ± 2 °C.
6. The design, manufact uring process, and specifications of t his device are
subject to change without no tice.
7. Derived mat hematically from one or more of the following directly
measured parameters: fC, IL, 3 dB bandwidth, fC versu s TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover)
frequenc y, fO. The n ominal f requency at any ca se tempera ture, T C, may be
calculated from: f = fO[1 - FTC (TO-TC)2]. Typically oscillator TO is
approximately equal to the specified resonator TO.
9. This equivalent RLC model approximate s resonator performance near the
resonan t frequen cy and is provided for refer ence o nly. The capaci tanc e CO
is the static (nonmotional) capaci tance between the tw o terminals
measured at low frequenc y (10 MHz) with a capac i tance meter. The
measureme nt includes p arasitic cap acitanc e with "NC” pads unconne cted.
Case pa r as itic capa citance is approximately 0.05 pF. Transduc er parallel
capacitance can by calculated as: CP≈CO-0.05pF.
10. Tape and Reel standard per ANSI / EIA 481.
SM5035-4
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