RO2023
•
•
•
•
Ideal for European 433.92 MHz Transmitters
Low Series Resistance
Quartz Stability
433.97 MHz
SAW
Resonator
Rugged, Hermetic, Low-Profile TO39 Case
The RO2023 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
433.92 MHz. The RO2023-10 is designed specifically for remote-control and wireless security devices oper-
ating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17 TR 2100.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation
(See: Typical Test Circuit)
+0
dBm
DC Voltage Between Any Two Pins
(Observe ESD Precautions)
±30
VDC
°C
TO39-3 Case
Case Temperature
-40 to +85
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
f
Center Frequency at +25 °C
Absolute Frequency
433.895
434.045
±75
MHz
kHz
dB
C
2, 3, 4, 5
2, 5, 6
Df
Tolerance from 433.970 MHz
C
Insertion Loss
Quality Factor
IL
3.4
8,600
3,050
37
4.8
Q
Unloaded Q
U
5, 6, 7
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
22
1.0
1.8
52
°C
O
f
f + 2.3
kHz
6, 7, 8
O
c
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
|fA|
0.037
ppm/°C
Frequency Aging
1
5
£10
ppm/yr
MW
W
DC Insulation Resistance between Any Two Pins
R
RF Equivalent RLC Model
Motional Resistance
55
168
0.8
57
196
0.9
2.4
M
L
Motional Inductance
5, 7, 9
µH
fF
M
C
Motional Capacitance
M
C
Pin 1 to Pin 2 Static Capacitance
Transducer Static Capacitance
5, 6, 9
5, 6, 7, 9
2, 7
2.1
pF
pF
nH
O
C
1.8
P
L
Test Fixture Shunt Inductance
Lid Symbolization
68.2
70.8
TEST
RFM RO2023
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
2.
Frequency aging is the change in fC with time and is specified at +65°C or less.
7.
8.
Derived mathematically from one or more of the following directly measured
parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO.
Turnover temperature, TO, is the temperature of maximum (or turnover) fre-
Aging may exceed the specification for prolonged temperatures above +65°C.
Typically, aging is greatest the first year after manufacture, decreasing in sub-
sequent years.
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
inductance, LTEST, is tuned for parallel resonance with CO at fC.
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 gov-
ernment approval, which is the responsibility of the equipment manufacturer.
Unless noted otherwise, case temperature TC = +25°C±2°C.
The design, manufacturing process, and specifications of this device are sub-
ject to change without notice.
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.
This equivalent RLC model approximates resonator performance near the res-
onant frequency and is provided for reference only. The capacitance CO 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 grund connected to either Pin 1 or Pin 2 and to the case), add
approximately 0.25 pF to CO.
9.
3.
4.
5.
6.
RF Monolithics, Inc.
RFM Europe
Phone: (972) 233-2903
Phone: 44 1963 251383
Fax: (972) 387-9148
Fax: 44 1963 251510
E-mail: info@rfm.com
http://www.rfm.com
RO2023-100300
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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