RP1298-2
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•
•
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Ideal for 433.92 MHz Superhet Receiver LOs
Nominal Insertion Phase Shift of 180° at Resonance
Quartz Stability
423.22 MHz
SAW
Rugged, Hermetic, Low-Profile TO39 Case
Complies with Directive 2002/95/EC (RoHS)
Pb
Resonator
The RP1298-2 is a two-port, 180° surface-acoustic-wave (SAW) resonator in a low-profile TO39 case. It pro-
vides reliable, fundamental-mode, quartz frequency stabilization of local oscillators operating at approxi-
mately 423.22 MHz. The RP1298-2 is designed for 433.92 MHz superhet receivers in remote-control and
wireless security applications operating in Europe under ETSI I-ETS 300 220 and in Germany under FTZ 17
TR 2100.
Absolute Maximum Ratings
Rating
Value
+0
Units
dBm
VDC
°C
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
±30
TO39-3 Case
-40 to +85
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency
fC
Absolute Frequency
423.145
423.295
MHz
2, 3, 4, 5,
ΔfC
IL
Tolerance from 423.220 MHz
±75
8.0
kHz
dB
Insertion Loss
Quality Factor
2, 5, 6
5, 6, 7
5.2
15,200
6,900
39
QU
QL
TO
fO
Unloaded Q
50 Ω Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temp. Coefficient
Absolute Value during First Year
24
1.0
2.2
54
°C
fC+2.6
0.037
≤ 10
6, 7, 8
kHz
ppm/°C2
ppm/yr
FTC
|fA|
Frequency Aging
6
5
DC Insulation Resistance between Any Two Pins
MΩ
Ω
RF Equivalent RLC
RM
LM
CM
CO
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
82
152
2.8
5, 7, 9
5, 6, 9
475.283
0.297547
2.5
µH
fF
pF
Lid Symbolization (in addition to Lot and/or Date Codes)
RP1298-2
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in fC with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures
above +65°C. Typically, aging is greatest the first year after manufacture, decreasing significantly in subsequent years.
2. The frequency fC is the frequency of minimum IL with the resonator in the specified test fixture in a 50 Ω test system with VSWR ≤ 1.2:1. Typically,
fOSCILLATOR or fTRANSMITTER is less than the resonator fC.
3. One or more of the following United States patents apply: 4,454,488; 4,616,197.
4. Typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufac-
turer.
5. Unless noted otherwise, case temperature TC = +25°C± 5°C
6. The design, manufacturing process, and specifications of this device are subject to change without notice.
7. Derived mathematically from one or more of the following directly measured 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]. Typically, oscillator TO is 20° less than the specified resonator TO.
9. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance
CO is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case parasitic
capacitance.
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
RP1298-2-010713
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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