RO3075E Datasheet, PDF (1/2 Pages) Murata Manufacturing Co., Ltd. – 345.00 MHz SAW Resonator

RO3075E
• Ideal for 345 MHz Automotive-Keyless-Entry Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
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The RO3075E 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 fixed frequency transmitters
operating at 345 MHz. The RO3075E is designed for wireless remote control and security transmitters
operating in the USA under FCC Part 15.
345.0 MHz
SAW
Absolute Maximum Ratings
Rating
Value
Units
Input Power Level
0
dBm
DC Voltage
12
VDC
Storage Temperature Range
-40 to +125
°C
Operating Temperature Range
Soldering Temperature (10 seconds / 5 cycles max.)
Electrical Characteristics
-40 to +105
°C
260
°C
SM3030-6 Case
3.0 X 3.0
Characteristic
Frequency (+25 °C)
Insertion Loss
Absolute Frequency
Tolerance from 345.0 MHz
Sym
f_C
Δf_C
IL
Notes
2, 3, 4, 5
2, 5, 6
Minimum
344.900
Typical
1.4
Maximum
345.100
±100
2.2
Units
MHz
kHz
dB
Quality Factor
Temperature Stability
Unloaded Q
50W Loaded Q
Turnover Temperature
Turnover Frequency
Q_U
Q_L
T_O
10
f_O
6, 7, 8
Frequency Temperature Coefficient FTC
Frequency Aging
Absolute Value during the First Year |f_A|
1, 6
DC Insulation Resistance between Any Two Terminals
5
1.0
27000
4200
25
f_C
0.032
10
35
°C
ppm/°C²
ppm/yr
MΩ
RF Equivalent RLC Model Motional Resistance
R_M
18
Ω
Motional Inductance
L_M
5, 7, 9
240
µH
Motional Capacitance
C_M
0.9
fF
Shunt Static Capacitance
C_O
5, 6, 9
4.3
pF
Test Fixture Shunt Inductance
L_TEST
2, 7
50
nH
Lid Symbolization
694 // YWWS
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
500 Pieces / Reel
10
3000 Pieces / Reel
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 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 approximately equal to the
calculated 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
resonator f_C.
3. One or more of the following United States patents apply: 4,454,488 and
resonant frequency and is provided for reference only. The capacitance C_O
is the static (nonmotional) capacitance between the two terminals
4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and
measured at low frequency (10 MHz) with a capacitance meter. The
measurement includes parasitic capacitance with "NC” pads unconnected.
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
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
capacitance can by calculated as: C_P ≈ C_O - 0.05 pF.
10. Tape and Reel Standard Per ANSI / EIA 481.
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- 3/26/08