®
RO2043
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Designed for 303.875 MHz SAW Resonator
Low Series Resistance
Quartz Stability
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
303.875 MHz
SAW
Pb
Resonator
The RO2043 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
303.825 MHz. The RO2043-1 is designed specitically for low-power AM transmitters on remote-control and
wireless alarm applications operating in the USA under FCC Part15, in Japan, in Australia, in Korea, and
elsewhere.
Absolute Maximum Ratings
Rating
Value
+5
Units
dBm
VDC
°C
CW RF Power Dissipation
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
±30
TO39-3 Case
-40 to +85
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
f
Frequency (+25 °C)
Nominal Frequency
303.775
303.975
MHz
C
2, 3, 4, 5
Df
Tolerance from 303.875 MHz
±100
7.0
kHz
dB
C
Insertion Loss
Quality Factor
IL
2, 5, 6
5, 6, 7
4.8
11300
4600
52
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
37
1.0
1.5
67
°C
O
f
f +8.2
6, 7, 8
kHz
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.037
10
ppm/°C
Frequency Aging
1, 6
5
ppm/yr
MW
W
DC Insulation Resistance between Any Two Pins
R
RF Equivalent RLC Model
Motional Resistance
74
437.961
.626346
1.8
124
2.1
M
L
Motional Inductance
5, 6, 7, 9
µH
M
C
Motional Capacitance
fF
M
C
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
5, 6, 9
5, 6, 7, 9
2, 7
pF
O
C
1.5
pF
P
L
Test Fixture Shunt Inductance
150
nH
TEST
Lid Symbolization (in addition to Lot and/or Date Codes)
RFM RO2043
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or less.
7. Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
8. Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
lated from: f = fO [1 - FTC (TO -TC)2]. Typically, oscillator TO is 20°C less than
the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the reso-
nant frequency and is provided for reference only. The capacitance CO is the
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, fC, is measured at the minimum insertion loss point, ILMIN
,
with the resonator in the 50 W test system (VSWR £ 1.2:1). The shunt induc-
tance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLA-
TOR or fTRANSMITTER is less than the resonator fC.
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 TC = +25°C±2°C.
6. The design, manufacturing process, and specifications of this device are subject
to change without notice.
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 CO.
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
RO2043-012306
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©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RFM [ RF MONOLITHICS, INC ]
