RO2104D Datasheet, PDF (1/2 Pages) RF Monolithics, Inc – 303.825 MHz SAW Resonator

®
RO2104D
• Ideal for 303.825 MHz Transmitters
• Very Low Series Resistance
• Quartz Stability
• Surface-Mount, Ceramic Case with 21 mm² Footprint
• Complies with Directive 2002/95/EC (RoHS)
Pb
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
CW RF Power Dissipation (See Typical Test Circuit)
DC Voltage Between Terminals (Observe ESD Precautions)
Case Temperature
Soldering Temperature (10 seconds / 5 cycles max.)
Value
+5
±30
-40 to +85
260
Units
dBm
VDC
°C
°C
303.825 MHz
SAW
Resonator
SM3838-6 Case
3.8 X 3.8
Electrical Characteristics
Characteristic
Frequency (+25 °C)
Nominal Frequency
Tolerance from 303.825 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 Terminals
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Motional Capacitance
Transducer Static Capacitance
Test Fixture Shunt Inductance
Lid Symbolization
Standard Reel Quantity
Reel Size 7 Inch
Reel Size 13 Inch
Sym
f_C
∆f_C
IL
Q_U
Q_L
T_O
f_O
FTC
|f_A|
R_M
L_M
C_M
C_O
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
2, 7
10
Minimum
303.725
10
1.0
Typical
1.5
10,000
1700
25
f_C
0.032
10
Maximum
303.925
±100
2.0
40
20
105
2.6
3.1
90
486
500 Pieces/Reel
3000 Pieces/Reel
Units
MHz
kHz
dB
°C
ppm/°C²
ppm/yr
MΩ
Ω
µH
fF
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. 7. Derived mathematically from one or more of the following directly measured
Aging may exceed the specification for prolonged temperatures above +65°C.
parameters: f_C, IL, 3 dB bandwidth, f_C versus T_C, and C_O.
Typically, aging is greatest the first year after manufacture, decreasing in subse- 8. Turnover temperature, T_O, is the temperature of maximum (or turnover) fre-
quent years.
quency, f_O. The nominal frequency at any case temperature, T_C, may be calcu-
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
inductance, L_TEST, is tuned for parallel resonance with C_O at f_C. Typically, f_OS-
lated from: f = f_O [1 - FTC (T_O -T_C)²]. Typically oscillator T_O is approximately
equal to the specified resonator T_O.
9. This equivalent RLC model approximates resonator performance near the reso-
CILLATOR ^{or f}TRANSMITTER ^{is approximately equal to the resonator f}C^.
3. One or more of the following United States patents apply: 4,454,488 and
nant frequency and is provided for reference only. The capacitance C_O is the
static (nonmotional) capacitance between the two terminals measured at low
4,616,197.
frequency (10 MHz) with a capacitance meter. The measurement includes para-
4. Typically, equipment utilizing this device requires emissions testing and govern-
sitic capacitance with "NC” pads unconnected. Case parasitic capacitance is
ment approval, which is the responsibility of the equipment manufacturer.
approximately 0.05 pF. Transducer parallel capacitance can by calculated as:
5.
6.
Unless noted otherwise, case temperature T_C = +25°C±2°C.
The design, manufacturing process, and specifications of this device are subject
C_P ≈ C_O - 0.05 pF.
10. Tape and Reel Standard Per ANSI / EIA 481.
to change.
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.
E-mail: [e-mail]
http://www.rfm.com
RO2104D-072804
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