RO2044 Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 318.00 M SAW Resonator

RO2044
• Designed for 318 MHz Transmitter Applications
• Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
• Complies with Directive 2002/95/EC (RoHS)
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The RO2044 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 or near 318 MHz. The RO2044 is designed specifically for remote-control and wireless security AM
transmitters operating in the USA under FCC Part 15, in Canada under Doc RSS-210, and in Australia.
318.00 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Electrical Characteristics
Value
+0
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Characteristic
Frequency (+25 °C)
Nominal Frequency
Tolerance from 318.000 MHz
Sym
f_C
Δf_C
Notes
2, 3, 4, 5
Minimum
317.900
Typical
Maximum
318.100
±100
Insertion Loss
IL
2, 5, 6
2.4
5.0
Quality Factor
Temperature Stability
Unloaded Q
50 Ω Loaded Q
Turnover Temperature
Turnover Frequency
Q_U
5, 6, 7
Q_L
10400
2400
T_O
29
44
59
f_O
6, 7, 8
f_C+4.2
Frequency Temperature Coefficient FTC
0.037
Frequency Aging
Absolute Value during the First Year
|fA|
1, 6
10
DC Insulation Resistance between Any Two Pins
5
1.0
RF Equivalent RLC Model Motional Resistance
R_M
32
78
Motional Inductance
L_M
5, 6, 7, 9
160.269
Motional Capacitance
C_M
1.56292
Pin 1 to Pin 2 Static Capacitance
C_O
5, 6, 9
2.9
3.2
3.6
Transducer Static Capacitance
C_P
5, 6, 7, 9
3.0
Test Fixture Shunt Inductance
L_TEST
2, 7
78
Lid Symbolization (in addition to Lot and/or Date Codes)
RFM // RO2044 // YWWS##
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Units
MHz
kHz
dB
°C
kHz
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
pF
pF
nH
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 significantly in subsequent years.
2. The center frequency, f_C, is measured at the minimum insertion loss point, IL_MIN, with the resonator in the 50 Ω 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 less than the resonator f_C.
3. One or more of the following United States patents apply: 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 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, 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 20°C less than 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 pin1 and pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement
includes case parasitic capacitance with a floating case. For usual grounded case applications (with ground connected to either pin 1 or pin 2 and to
the case), add approximately 0.25 pF to C_O.
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©2008 by RF Monolithics, Inc.
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RO2044 - 3/25/08