RO2144D 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 RO2144D 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.
RO2144D
RO2144D-1
RO2144D-2
916.5 MHz
SAW
Resonator
Absolute Maximum Ratings
Input Power Level
Rating
DC Voltage
Storage Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Electrical Characteristics
Characteristic
Frequency (+25 °C) Nominal Frequency
RO2144D
RO2144D-1
RO2144D-2
Tolerance from 916.5 MHz
RO2144D
RO2144D-1
RO2144D-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 +85
260
Units
dBm
VDC
°C
°C
SM3838-6 Case
3.8 X 3.8
Sym
Notes
Minimum
916.405
Typical
Maximum
916.595
Units
f_C
916.300
2, 3, 4, 5
916.350
916.700
916.650
±95
MHz
∆f_C
±200
kHz
±150
IL
2, 5, 6
1.20
2.5
dB
Q_U
5, 6, 7
Q_L
T_O
10
f_O
6, 7, 8
FTC
|fA|
1
23,509
4,000
25
fc
0.032
10
40
°C
MHz
ppm/°C²
ppm
5
1.0
MΩ
R_M
14.95
Ω
L_M
5, 6, 7, 9
21.94
µH
C_M
1.37
fF
C_P
5, 6, 9
1.95
pF
L_TEST
2, 7
15.05
nH
RO2144D 432//YWWS, RO2144D-1 493//YWWS, RO2144D-2 537//YWWS
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 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 Per 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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