®
RO2104D
•
•
•
Ideal for 303.825 MHz Transmitters
Very Low Series Resistance
Quartz Stability
Surface-Mount, Ceramic Case with 21 mm2 Footprint
303.825 MHz
SAW
•
•
Complies with Directive 2002/95/EC (RoHS)
Pb
Resonator
The RO2104D is a true one-port, surface-acoustic-wave (SAW) resonator in a surface-mount, ceramic case.
It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operat-
ing at 303.825 MHz. This SAW is designed specifically for AM transmitters in wireless security and remote
control applications operating in the USA under FCC Part 15, in Australia, in Japan, and in Korea.
Absolute Maximum Ratings
Rating
Value
+5
Units
dBm
VDC
°C
CW RF Power Dissipation (See Typical Test Circuit)
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
±30
-40 to +85
260
SM3838-6 Case
3.8 X 3.8
Soldering Temperature (10 seconds / 5 cycles max.)
°C
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
f
Frequency (+25 °C)
Nominal Frequency
303.725
303.925
MHz
C
2, 3, 4, 5
Df
Tolerance from 303.825 MHz
±100
2.0
kHz
dB
C
Insertion Loss
Quality Factor
IL
2, 5, 6
5, 6, 7
1.5
10,000
1700
25
Q
Unloaded Q
U
Q
T
50 W Loaded Q
L
Temperature Stability
Turnover Temperature
Turnover Frequency
10
40
°C
O
f
f
6, 7, 8
O
C
2
Frequency Temperature Coefficient
Absolute Value during the First Year
FTC
0.032
10
ppm/°C
|f |
Frequency Aging
1, 6
5
ppm/yr
MW
W
A
DC Insulation Resistance between Any Two Terminals
1.0
R
RF Equivalent RLC Model
Motional Resistance
20
105
2.6
3.1
90
M
5, 6, 7,
9,
L
Motional Inductance
µH
M
C
Motional Capacitance
Transducer Static Capacitance
fF
M
C
5, 6, 9
2, 7
pF
O
L
Test Fixture Shunt Inductance
Lid Symbolization
nH
TEST
486
500 Pieces/Reel
3000 Pieces/Reel
Reel Size 7 Inch
Reel Size 13 Inch
Standard Reel Quantity
10
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.
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 subse-
quent years.
8.
quency, fO. The nominal frequency at any case temperature, TC, may be calcu-
The center frequency, fC, is measured at the minimum insertion loss point,
lated from: f = fO [1 - FTC (TO -TC)2]. Typically oscillator TO is approximately
equal to the specified resonator TO.
This equivalent RLC model approximates resonator performance near the reso-
nant frequency and is provided for reference only. The capacitance CO is the
static (nonmotional) capacitance between the two terminals measured at low
frequency (10 MHz) with a capacitance meter. The measurement includes para-
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
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. Typically, fOS-
CILLATOR or fTRANSMITTER is approximately equal to the resonator 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 govern-
ment 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 subject
to change.
9.
3.
4.
5.
6.
C
P » CO - 0.05 pF.
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
RO2104D-072804
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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