Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Frequency (+25 °C)Absolute Frequency f C
2, 3, 4, 5314.950315.050MHz
Tolerance from 315.0MHz?f C±50kHz Insertion Loss IL2, 5, 6 1.6 2.4dB Quality Factor Unloaded Q Q U8200
50 ? Loaded Q Q L1350
Temperature Stability Turnover Temperature T O
6, 7, 8102535°C
Turnover Frequency f O f C
Frequency Temperature Coefficient FTC0.032ppm/°C2 Frequency Aging Absolute Value during the First Year|f A|1, 610ppm/yr DC Insulation Resistance between Any Two Terminals5 1.0M?
RF Equivalent RLC Model Motional Resistance R M
5, 7, 919.8?
Motional Inductance L M82μH
Motional Capacitance C M 3.1fF
Shunt Static Capacitance C O5, 6, 9 4.1pF Test Fixture Shunt Inductance L TEST2, 763nH Lid Symbolization802 // YWWS
Standard R eel Q uantity
Reel Size 7 Inch
10
500 Pieces / Reel Reel Size 13 Inch3000 Pieces / Reel
?Ideal for 315MHz Automotive-Keyless-Entry Transmitters
?Very Low Series Resistance
?Quartz Stability
?Complies with Directive 2002/95/EC (RoHS)
The RO3073E-1 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 local oscillators operating at approximately 315MHz. This SAW was designed for AM transmitters in automotive-keyless-entry applica-tions operating in the USA under FCC Part 15, in Canada under DoC RSS-210, and in Italy.
Absolute Maximum Ratings
Rating Value Units Input Power Level0dBm
DC Voltage12VDC Storage Temperature Range-40 to +125°C Operating Temperature Range-40 to +105°C Soldering Temperature (10 seconds / 5 cycles max.)260°C 315.0 MHz
SAW Resonator RO3073E-1
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.Frequency aging is the change in f C with time and is specified at +65°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 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 induc-
tance, L TEST, is tuned for parallel resonance with C O at f C. Typically, f OSCILLA-TOR
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 govern-
ment approval, which is the responsibility of the equipment manufacturer.
5.Unless noted otherwise, case temperature T C=+25°C±2°C.
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, 3dB bandwidth, f C versus T C, and C O.
8.Turnover temperature, T O, is the temperature of maximum (or turnover) fre-
quency, f O. The nominal frequency at any case temperature, T C, may be calcu-lated 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 reso-
nant frequency and is provided for reference only. The capacitance C O is the
static (nonmotional) capacitance between the two terminals measured at low fre-quency (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 by calculated as:
C P≈C O-0.05pF.
10.Tape and Reel Standard Per ANSI / EIA 481.
Pb
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315.0 MHz SAW Resonator
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Case Dimensions
Equivalent LC Mode l
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and does not include LC component temperature contributions .
Pin Connection
1NC 2Terminal 3NC 4NC 5Terminal 6
NC
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 indi-cates 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
Dimension
mm Inches Min Nom Max Min Nom Max A 2.87 3.0 3.130.1130.1180.123B 2.87 3.0 3.130.1130.1180.123C 1.12 1.25 1.380.0440.0490.054D 0.770.90 1.030.0300.0350.040E 2.67 2.80 2.930.1050.1100.115F 1.47 1.6 1.730.0580.0630.068G 0.720.850.980.0280.0330.038H 1.37 1.5 1.630.0540.0590.064I 0.470.600.730.0190.0240.029J
1.17
1.30
1.43
0.046
0.051
0.056
分销商库存信息: RFM
RO3073E-1