RO2044 Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 318.00 M SAW Resonator

Preliminary
®
• Designed for 318 MHz Transmitter Applications
• Low Series Resistance
• Quartz Stability
• Rugged, Hermetic, Low-Profile TO39 Case
• Complies with Directive 2002/95/EC (RoHS) Pb
The RO2044 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode quartz frequency stabilization of fixed-frequency transmitters operating at
or near 318 MHz. The RO2044 is designed specifically for remote-control and wireless security AM transmit-
ters operating in the USA under FCC Part 15, in Canada under Doc RSS-210, and in Australia.
RO2044
318.00 MHz
SAW
Resonator
Absolute Maximum Ratings
Rating
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Value
+0
±30
-40 to +85
Units
dBm
VDC
°C
TO39-3 Case
Electrical Characteristics
Frequency (+25 °C)
Characteristic
Nominal Frequency
Tolerance from 318.000 MHz
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 Pins
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization (in addition to Lot and/or Date Codes)
Sym
f_C
∆f_C
IL
Q_U
Q_L
T_O
f_O
FTC
|fA|
R_M
L_M
C_M
C_O
C_P
L_TEST
Notes
2, 3, 4, 5
2, 5, 6
5, 6, 7
6, 7, 8
1, 6
5
5, 6, 7, 9
5, 6, 9
5, 6, 7, 9
2, 7
Minimum
317.900
Typical
Maximu
318.100
±100
2.4
5.0
10400
2400
29
44
59
f_C+4.2
0.037
10
1.0
32
78
160.269
1.56292
2.9
3.2
3.6
3.0
78
RFM // RO2044 // YWWS##
Units
MHz
kHz
dB
°C
kHz
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
pF
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 exceed the specification for prolonged temperatures above +65°C.
Typically, aging is greatest the first year after manufacture, decreasing signifi-
cantly in subsequent years.
2. The center frequency, f_C, is measured at the minimum insertion loss point, IL_MIN,
with the resonator in the 50 Ω test system (VSWR ≤ 1.2:1). The shunt induc-
tance, L_TEST, is tuned for parallel resonance with C_O at f_C. Typically, f_OSCILLA-
TOR ^{or f}TRANSMITTER ^{is less than the resonator f}C^.
3. One or more of the following United States patents apply: 4,454,488 and
4,616,197 and others pending.
4. Typically, equipment designs utilizing this device require emissions testing and
government approval, which is the responsibility of the equipment manufacturer.
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 without notice.
7. Derived mathematically from one or more of the following directly measured
parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
8. Turnover temperature, T_O, is the temperature of maximum (or turnover) fre-
quency, f_O. The nominal frequency at any case temperature, T_C, may be calcu-
lated from: f = f_O [1 - FTC (T_O -T_C)²]. Typically, oscillator T_O is 20°C less than
the specified resonator T_O.
9. This equivalent RLC model approximates resonator performance near the reso-
nant frequency and is provided for reference only. The capacitance C_O is the
static (nonmotional) capacitance between pin1 and pin 2 measured at low fre-
quency (10 MHz) with a capacitance meter. The measurement includes case
parasitic capacitance with a floating case. For usual grounded case applica-
tions (with ground connected to either pin 1 or pin 2 and to the case), add
approximately 0.25 pF to C_O.
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.
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http://www.rfm.com
RO2044-082802
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