RO3144A Datasheet, PDF (1/2 Pages) Murata Manufacturing Co., Ltd. – 916.5 MHz SAW Resonator

• Ideal for 916.5 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Surface-mount Ceramic Case
• Complies with Directive 2002/95/EC (RoHS) _Pb
The RO3144A 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 916.5 MHz.
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals
Case Temperature
Soldering Temperature, 10 seconds / 5 cycles maximum
Value
0
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
RO3144A
RO3144A-1
RO3144A-2
916.5 MHz
SAW
Resonator
Electrical Characteristics
Characteristic
Frequency, +25 °C
RO3144A
RO3144A-1
RO3144A-2
Tolerance from 916.5 MHz
RO3144A
RO3144A-1
RO3144A-2
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 Terminals
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
SM5035-4
Sym Notes Minimum Typical Maximum Units
916.300
916.700
f_C
916.350
916.650
MHz
2,3,4,5
916.400
916.600
±200
∆f_C
±150
kHz
±100
IL
2,5,6
1.2
2.5
dB
Q_U
5,6,7
Q_L
T_O
10
f_O
6,7,8
FTC
|fA|
1
6600
750
25
f_C
0.032
<±10
40
°C
kHz
ppm/°C²
ppm/yr
5
1.0
MΩ
R_M
13.1
Ω
L_M
5, 6, 7, 9
15
µH
C_M
2.1
fF
C_O
5, 6, 9
2.09
pF
L_TEST
2, 7
14.5
nH
RO3144A: 663, RO3144A-1: 897, RO3144A-2: 813, // YWWS
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 6. The design, manufacturing process, and specifications of this device are
less. Aging may exceed the specification for prolonged temperatures
subject to change without notice.
above +65 °C. Typically, aging is greatest the first year after manufacture, ^{7. Derived mathematically from one or more of the following directly}
decreasing in subsequent years.
measured parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
2. The center frequency, f_C, is measured at the minimum insertion loss point, 8. Turnover temperature, T_O, is the temperature of maximum (or turnover)
IL_MIN, with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
frequency, f_O. The nominal frequency at any case temperature, T_C, may be
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
resonator f_C.
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
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
resonant frequency and is provided for reference only. The capacitance C_O
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (10 MHz) with a capacitance meter. The
government approval, which is the responsibility of the equipment
manufacturer.
measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel
5. Unless noted otherwise, case temperature T_C = +25 ± 2 °C.
capacitance can by calculated as: C_P ≈ C_O - 0.05 pF.
www.RFM.com E-mail: [e-mail]
© 2009-2011 by RF Monolithics, Inc.
Page 1 of 2
RO3144A - 8/15/11