RO2144E Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 916.5 MHz SAW Resonator

®
• Ideal for 916.5 MHz FCC Part 15 Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS) _Pb
The RO2144E is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount ceramic case.
It provides reliable, fundamental-mode stabilization of fixed-frequency transmitters operating at 916.5 MHz.
This SAW is designed specifically for remote-control and data-link transmitters operating in the USA under
FCC Part 15 regulations.
RO2144E
RO2144E-1
RO2144E-2
916.5 MHz
SAW
Resonator
Absolute Maximum Ratings
Input Power Level
Rating
DC Voltage
Storage Temperature
Operating Temperature Range
Electrical Characteristics
Characteristic
Frequency (+25 °C) Nominal Frequency
RO2144E
RO2144E-1
RO2144E-2
Tolerance from 916.5 MHz
RO2144E
RO2144E-1
RO2144E-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
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
Value
10
12
-40 to +125
-40 to +125
Sym
Notes
f_C
2, 3, 4, 5
∆f_C
IL
Q_U
Q_L
T_O
f_O
FTC
|fA|
R_M
L_M
C_M
C_P
L_TEST
2, 5, 6
5, 6, 7
6, 7, 8
1
5
5, 6, 7, 9
5, 6, 9
2, 7
10
Units
dBm
VDC
°C
°C
SM3030-6 Case
3.0 X 3.0
Minimum
916.300
Typical
Maximum
916.700
916.350
916.650
916.405
916.595
±200
±150
±95
1.2
1.6
8000
8900
TBD
15
25
35
fc
0.032
10
1.0
12
17
19.8
1.7
1.9
TBD
515 // YWWS
500 Pieces / Reel
3000 Pieces / Reel
Units
MHz
kHz
dB
°C
MHz
ppm/°C²
ppm
MΩ
Ω
µH
fF
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 less. Aging may
7. Derived mathematically from one or more of the following directly measured parameters: f_C,
exceed the specification for prolonged temperatures above +65°C. Typically, aging is great-
IL, 3 dB bandwidth, f_C versus T_C, and C_O.
est the first year after manufacture, decreasing in subsequent years.
8. Turnover temperature, T_O, is the temperature of maximum (or turnover) frequency, f_O. The
2. The center frequency, f_C, is measured at the minimum insertion loss point, IL_MIN, with the res-
nominal frequency at any case temperature, T_C, may be calculated from: f = f_O [1 - FTC (T_O -
onator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt inductance, L_TEST, is tuned for par-
allel resonance with C_O at f_C. Typically, f_OSCILLATOR or f_TRANSMITTER is approximately equal _9.
T_C)²]. Typically oscillator T_O is approximately equal to the specified resonator T_O.
This equivalent RLC model approximates resonator performance near the resonant fre-
to the resonator f_C.
3. One or more of the following United States patents apply: 4,454,488 and 4,616,197.
quency 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 capaci-
4. Typically, equipment utilizing this device requires emissions testing and government
approval, which is the responsibility of the equipment manufacturer.
tance meter. The measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel capacitance can by
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
calculated as: C_P ≈ C_O - 0.05 pF.
10. Tape and Reel Standard for ANSI / EIA 481.
without notice.
RF Monolithics, Inc. Phone: [phone]
Fax: [phone]
RFM Europe
Phone: [phone]
Fax: [phone]
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: [e-mail]
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