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RO2188 390.0 MHz SAW Resonator
* * * * *
Ideal for 390.0 MHz Transmitters Very Low Series Resistance Quartz Stability Rugged, Hermetic, TO39-3 Package Complies with Directive 2002/95/EC (RoHS)
Pb
The RO2188 is a true one-port, surface-acoustic-wave (SAW) resonator in TO39-3 case. It provides reliable, fundamental-mode, quartz frequency stabilization of fixed-frequency transmitters operating at 390.0 MHz.
Absolute Maximum Ratings
Rating CW RF Power Dissipation DC Voltage Between Any Two Pins (Observe ESD Precautions) Case Temperature Value +5 30 -40 to +85 Units dBm VDC C
TO39-3 Case
Electrical Characteristics
Characteristic Center Frequency at +25 C Absolute Frequency Tolerance from 304.0 MHz 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 DC Insulation Resistance between Any Two Terminals RM LM CM CO CP LTEST 5, 6, 9 5, 6, 7, 9 2, 7 E319 3.6 5, 7, 9 Sym fC fC IL QU QL TO fO FTC |fA| 1 5 1.0 11 54.963 3.0299 3.9 3.65 43 4.2 26 6, 7, 8 Notes 2, 3, 4, 5 2, 5, 6 5, 6, 7 27 Minimum 389.900 Typical Maximum 390.100 100 0.9 12,000 1,200 42 fC-5 0.037 10 57 C kHz ppm/C2 ppm/yr M H fF pF pF nH 2.0 Units MHz kHz dB
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling. Notes:
1. 2. Lifetime (10 year) frequency aging. 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. 3. 4. 5. 6. 7. 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 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. Derived mathematically from one or more of the following directly measured 9. parameters: fC, IL, 3 dB bandwidth, fC versus TC, and CO. 8. 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]. 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 the two terminals measured at low frequency (10 MHz) with a capacitance meter. The measurement includes parasitic capacitance with a floating case. Case parasitic capacitance is approximately 0.25pF. Transducer parallel capacitance can be calculated as: CP CO - 0.25pF.
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-9148 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 RO2188-031300
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390.0 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) 387-9148 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 RO2188-031300
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