RO2144D
RO2144D-1
RO2144D-2
®
•
•
•
•
Ideal for 916.5 MHz FCC Part 15 Transmitters
Very Low Series Resistance
Quartz Stability
916.5 MHz
SAW
Resonator
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.
Absolute Maximum Ratings
Rating
Value
Units
Input Power Level
DC Voltage
10
dBm
12
VDC
°C
Storage Temperature
-40 to +85
Soldering Temperature (10 seconds / 5 cycles max.)
260
°C
SM3838-6 Case
3.8 X 3.8
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency (+25 °C) Nominal Frequency
Tolerance from 916.5 MHz
Insertion Loss
RO2144D
916.405
916.595
f
RO2144D-1
RO2144D-2
RO2144D
916.300
916.350
916.700
916.650
±95
MHz
C
2, 3, 4, 5
Df
RO2144D-1
RO2144D-2
±200
kHz
dB
C
±150
IL
2, 5, 6
5, 6, 7
1.20
23,509
4,000
25
2.5
Quality Factor
Unloaded Q
Q
U
50 W Loaded Q
Q
L
Temperature Stability
Turnover Temperature
T
10
40
°C
O
Turnover Frequency
f
6, 7, 8
fc
MHz
O
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.032
10
ppm/°C
ppm
Frequency Aging
1
5
DC Insulation Resistance between Any Two Terminals
1.0
MW
W
RF Equivalent RLC Model
Motional Resistance
R
14.95
21.94
1.37
M
Motional Inductance
L
5, 6, 7, 9
µH
fF
M
Motional Capacitance
Transducer Static Capacitance
C
M
C
5, 6, 9
2, 7
1.95
pF
nH
P
Test Fixture Shunt Inductance
Lid Symbolization
L
15.05
TEST
RO2144D 432//YWWS, RO2144D-1 493//YWWS, RO2144D-2 537//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.
2.
Frequency aging is the change in f with time and is specified at +65°C or less. Aging may
C
exceed the specification for prolonged temperatures above +65°C. Typically, aging is great-
est the first year after manufacture, decreasing in subsequent years.
7.
8.
Derived mathematically from one or more of the following directly measured parameters: f ,
C
IL, 3 dB bandwidth, f versus T , and C .
C C O
Turnover temperature, T , is the temperature of maximum (or turnover) frequency, f . The
O
O
The center frequency, f , is measured at the minimum insertion loss point, IL , with the res-
C
MIN
nominal frequency at any case temperature, T , may be calculated from: f = f [1 - FTC (T -
C
O
O
onator in the 50 W test system (VSWR £ 1.2:1). The shunt inductance, L
, is tuned for par-
TEST
2
T
) ]. Typically oscillator T is approximately equal to the specified resonator T .
O O
C
allel resonance with C at f . Typically, f
or f
is approximately equal
TRANSMITTER
O
C
OSCILLATOR
9.
This equivalent RLC model approximates resonator performance near the resonant fre-
quency and is provided for reference only. The capacitance C is the static (nonmotional)
to the resonator f .
C
O
3.
4.
One or more of the following United States patents apply: 4,454,488 and 4,616,197.
Typically, equipment utilizing this device requires emissions testing and government
approval, which is the responsibility of the equipment manufacturer.
capacitance between the two terminals measured at low frequency (10 MHz) with a capaci-
tance meter. The measurement includes parasitic capacitance with "NC” pads unconnected.
Case parasitic capacitance is approximately 0.05 pF. Transducer parallel capacitance can by
calculated as: C » C - 0.05 pF.
5.
6.
Unless noted otherwise, case temperature T = +25°C±2°C.
C
P
O
The design, manufacturing process, and specifications of this device are subject to change
without notice.
10.
Tape and Reel Standard Per ANSI/EIA 481.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-8148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2144D_RO2144D-1_RO2144D-2_083104
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©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
