RO2043 Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – Designed for 303.875 MHz SAW Resonator

• Designed for 303.875 MHz SAW Resonator
• Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
• Complies with Directive 2002/95/EC (RoHS)
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The RO2043 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 303.825 MHz. The RO2043-1 is designed specitically for low-power AM transmitters on remote-control and
wireless alarm applications operating in the USA under FCC Part15, in Japan, in Australia, in Korea, and
elsewhere.
RO2043
303.875 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Value
+5
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Electrical Characteristics
Characteristic
Frequency (+25 °C)
Insertion Loss
Nominal Frequency
Tolerance from 303.875 MHz
Sym
f_C
Δf_C
IL
Notes
2, 3, 4, 5
2, 5, 6
Minimum
303.775
Typical
4.8
Quality Factor
Temperature Stability
Unloaded Q
50 Ω Loaded Q
Q_U
5, 6, 7
Q_L
Turnover Temperature
T_O
37
Turnover Frequency
f_O
6, 7, 8
Frequency Temperature Coefficient FTC
11300
4600
52
f_C+8.2
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
Motional Inductance
Motional Capacitance
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in addition to Lot and/or Date Codes)
R_M
L_M
C_M
C_O
C_P
L_TEST
5, 6, 7, 9
5, 6, 9
5, 6, 7, 9
2, 7
74
437.961
.626346
1.5
1.8
1.5
150
RFM RO2043
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Maximum
303.975
±100
7.0
Units
MHz
kHz
dB
67
°C
kHz
ppm/°C²
ppm/yr
MΩ
124
Ω
µH
fF
2.1
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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RO2043 - 3/25/08