RO3073 Datasheet, PDF (1/2 Pages) Murata Manufacturing Co., Ltd. – 315.0 MHz SAW Resonator

RO3073
• Ideal for 315.0 MHz Transmitters
• Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
• Complies with Directive 2002/95/EC (RoHS)
Pb
The RO3073 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 315 MHz. The RO3073 is designed specifically for wireless remote controls and security transmitters,
typically for automotive-keyless-entry, operating in the USA under FCC Part 15, in Canada under DoC RSS-
210, and in Italy.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation (See Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Value
+0
±30
Units
dBm
VDC
Case Temperature
-40 to +85
°C
Soldering Temperature (10 seconds/5 cycles Max)
260
°C
315.0 MHz
SAW
Resonator
TO39-3 Case
Electrical Characteristics
Characteristic
Center Frequency (+25 °C) Absolute Frequency
Tolerance from 315.000 MHz
Insertion Loss
Quality Factor
Unloaded Q
50 Ω Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temperature Coefficient
Frequency Aging
Absolute Value during the First Year
DC Insulation Resistance between Any Two Pins
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)
Sym
f_C
Δf_C
IL
Q_U
Q_L
T_O
f_O
FTC
|f_A|
R_M
L_M
C_M
C_O
C_P
L_TEST
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
6, 7, 8
1
5
5, 7, 9
5, 6, 9
5, 6, 7, 9
2, 7
Minimum
314.925
Typical
1.5
7800
1100
10
25
f_c
0.037
≤10
1.0
16
63
4.1
3.6
3.6
65.7
RFM RO3073
Maximum
315.075
±75
2.2
Units
MHz
kHz
dB
40
°C
kHz
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
pF
pF
nH
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
subject to change without notice.
less. Aging may exceed the specification for prolonged temperatures
7. Derived mathematically from one or more of the following directly
above +65°C. Typically, aging is greatest the first year after manufacture,
measured parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
decreasing significantly in subsequent years.
8. Turnover temperature, T_O, is the temperature of maximum (or turnover)
2. The center frequency, f_C, is measured at the minimum insertion loss point,
frequency, f_O. The nominal frequency at any case temperature, T_C, may be
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.
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
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
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.
www.RFM.com E-mail: [e-mail]
©2008 by RF Monolithics, Inc.
Page 1 of 2
RO3073 - 3/26/08