RO2144E
RO2144E-1
RO2144E-2
• Ideal for 916.5 MHz FCC Part 15 Transmitters
• Very Low Series Resistance
• Quartz Stability
• Complies with Directive 2002/95/EC (RoHS)
916.5 MHz
SAW
Resonator
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.
Absolute Maximum Ratings
Rating
Value
Units
Input Power Level
10
dBm
DC Voltage
12
VDC
°C
Storage Temperature
Operating Temperature Range
-40 to +125
-40 to +125
°C
SM3030-6 Case
3.0 X 3.0
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Frequency (+25 °C) Nominal Frequency
RO2144E
RO2144E-1
RO2144E-2
RO2144E
916.300
916.700
f
916.350
916.405
916.650
916.595
±200
MHz
C
2, 3, 4, 5
Tolerance from 916.5 MHz
Insertion Loss
Δf
RO2144E-1
RO2144E-2
±150
kHz
dB
C
±95
IL
2, 5, 6
5, 6, 7
1.2
8900
TBD
25
1.6
Quality Factor
Unloaded Q
Q
8000
15
U
50 Ω Loaded Q
Turnover Temperature
Q
L
Temperature Stability
T
35
17
°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
MΩ
Ω
µH
fF
RF Equivalent RLC Model
Motional Resistance
R
12
19.8
1.7
M
Motional Inductance
L
5, 6, 7, 9
M
Motional Capacitance
Transducer Static Capacitance
C
M
C
5, 6, 9
2, 7
1.9
pF
nH
P
Test Fixture Shunt Inductance
Lid Symbolization
L
TBD
TEST
515 // YWWS
500 Pieces / Reel
3000 Pieces / Reel
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
10
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
C
6.
The design, manufacturing process, and specifications of this device are
subject to change without notice.
less. Aging may exceed the specification for prolonged temperatures
above +65°C. Typically, aging is greatest the first year after manufacture,
decreasing in subsequent years.
7.
Derived mathematically from one or more of the following directly
measured parameters: f , IL, 3 dB bandwidth, f versus T , and C .
Turnover temperature, T , is the temperature of maximum (or turnover)
C
C
C
O
The center frequency, f , is measured at the minimum insertion loss point,
8.
9.
C
O
IL , with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The
frequency, f . The nominal frequency at any case temperature, T , may be
MIN
O
C
2
shunt inductance, L
, is tuned for parallel resonance with C at f .
TEST
O C
calculated from: f = f [1 - FTC (T -T ) ]. Typically oscillator T is
O O C O
approximately equal to the specified resonator T .
This equivalent RLC model approximates resonator performance near the
resonant frequency and is provided for reference only. The capacitance C
is the static (nonmotional) capacitance between the two terminals
measured at low frequency (10 MHz) with a capacitance 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.
Typically, f
or f
is approximately equal to the
OSCILLATOR
TRANSMITTER
O
resonator f .
C
3.
4.
One or more of the following United States patents apply: 4,454,488 and
4,616,197.
O
Typically, equipment utilizing this device requires emissions testing and
government approval, which is the responsibility of the equipment
manufacturer.
5.
Unless noted otherwise, case temperature T = +25°C±2°C.
C
P
O
10. Tape and Reel Standard for ANSI / EIA 481.
www.RFM.com
E-mail: info@rfm.com
Page 1 of 2
©2008 by RF Monolithics, Inc.
RO2144E - 3/25/08
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