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RO2043 303.875 MHz SAW Resonator
* * * * *
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)
Pb
The RO2043 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It provides 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 CW RF Power Dissipation DC Voltage Between Terminals (Observe ESD Precautions) Case Temperature Value +5 30 -40 to +85 Units dBm VDC C
TO39-3 Case
Electrical Characteristics
Frequency (+25 C) Insertion Loss Quality Factor Temperature Stability Unloaded Q 50 Loaded Q Turnover Temperature Turnover Frequency Frequency Temperature Coefficient Frequency Aging RF Equivalent RLC Model Absolute Value during the First Year 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) DC Insulation Resistance between Any Two Pins RM LM CM CO CP LTEST 5, 6, 9 5, 6, 7, 9 2, 7 1.5 5, 6, 7, 9 Characteristic Nominal Frequency Tolerance from 303.875 MHz Sym fC fC IL QU QL TO fO FTC |fA| 1, 6 5 1.0 74 437.961 .626346 1.8 1.5 150 RFM RO2043 2.1 124 6, 7, 8 Notes 2, 3, 4, 5 2, 5, 6 5, 6, 7 37 Minimum 303.775 Typical Maximum 303.975 100 4.8 11300 4600 52 fC+8.2 0.037 10 67 C kHz ppm/C2 ppm/yr M H fF pF pF nH 7.0 Units MHz kHz dB
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes:
1. Frequency aging is the change in fC with time and is specified at +65C or less. Aging may exceed the specification for prolonged temperatures above +65C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years. The center frequency, fC, is measured at the minimum insertion loss point, ILMIN, with the resonator in the 50 test system (VSWR 1.2:1). The shunt inductance, LTEST, is tuned for parallel resonance with CO at fC. Typically, fOSCILLATOR or fTRANSMITTER is less than the resonator fC. One or more of the following United States patents apply: 4,454,488 and 4,616,197 and others pending. Typically, equipment designs utilizing this device require emissions testing and government approval, which is the responsibility of the equipment manufacturer. Unless noted otherwise, case temperature TC = +25C2C. The design, manufacturing process, and specifications of this device are subject to change without notice. 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) frequency, fO. The nominal frequency at any case temperature, TC, may be calculated from: f = fO [1 - FTC (TO -TC)2]. Typically, oscillator TO is 20C less than the specified resonator TO. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance CO is the static (nonmotional) capacitance between pin1 and pin 2 measured at low frequency (10 MHz) with a capacitance meter. The measurement includes case parasitic capacitance with a floating case. For usual grounded case applications (with ground connected to either pin 1 or pin 2 and to the case), add approximately 0.25 pF to CO.
2.
9.
3. 4. 5. 6.
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com http://www.rfm.com RO2043-012306
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303.875 MHz
Electrical Connections
SAW Resonator
Temperature Characteristics
The curve shown on the right accounts for resonator contribution only and does not include oscillator temperature characteristics.
fC = f O , T C = T O
0
(f-fo ) / fo (ppm)
This one-port, two-terminal SAW resonator is bidirectional. The terminals are interchangeable with the exception of circuit board layout. Pin 1 2 3 Connection Terminal 1 Terminal 2 Case Ground
Pin 3 Pin 1 Bottom View Pin 2
0 -50 -100 -150 -200 0 +20 +40 +60 +80
-50
-100
-150 -200 -80 -60 -40 -20
Typical Test Circuit
The test circuit inductor, LTEST, is tuned to resonate with the static capacitance, CO at FC.
T = TC - T O ( C )
Electrical Test:
Network Analyzer
1 2
Equivalent LC Model
The following equivalent LC model is valid near resonance:
Network Analyzer
1
2
Cp
Co= Cp + 0.25 pF*
*Case Parasitics
3
R M
L
M
C
M 0.5 pF*
0.5 pF*
Power Test:
3
P INCIDENT
1
Low-Loss Matching Network to 50
50 Source at P REFLECTED F C
3
Case Design
2
B C G
CW RF Power Dissipation =
-P P INCIDENT REFLECTED
H
Typical Application Circuits
Typical Low-Power Transmitter Application:
200k
F A D (3 places) J (2 places)
+9VDC
E
Modulation Input
MPS-H10 47
C1
45
L1
1
2
(Antenna)
Millimeters Dimensions Min Max 9.40 3.18 2.50 3.50 0.098 0.46 Nominal 5.08 Nominal 2.54 Nominal 2.54 Nominal 1.02 1.40 0.055 Min
Inches Max 0.370 0.125 0.138 0.018 Nominal 0.200 Nominal 0.100 Nominal 0.100 Nominal 0.040
C2 ROXXXX Bottom View 3
470
RF Bypass
A B C D E
Typical Local Oscillator Application:
Output C1 1 2
+VDC L1
F G H J
+VDC
C2 ROXXXX
Bottom View
3
RF Bypass
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 RFM Europe Phone: 44 1963 251383 Fax: 44 1963 251510 (c)1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
E-mail: info@rfm.com http://www.rfm.com RO2043-012306
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