RS1207 [ETC]
Analog IC ; 模拟IC\n
ETC 
RS1207
• Designed for 433.92 MHz Transmitters
• 0° Nominal Insertion Phase at Resonance
• Rugged, Hermetic, Low Profile TO-39 Case
433.92 MHz
SAW
Resonator
The RS1207 is a 2-port surface acoustic wave (SAW) resonator that provides
reliable quartz frequency stabilization of low-power AM and FSK transmitters at
433.92 MHz for use in Europe. Applications include remote control and wireless
security devices. This resonator is designed specifically as a pin-for-pin replacement
in pre-existing transmitter circuits designed around a 2-port, 0° SAW resonator.
ABSOLUTE MAXIMUM RATINGS
Rating
CW RF Power Dissipation
Value
+10
Units
dBm
VDC
°C
DC Voltage between any 2 pins (See note 9)
Case Temperature (See note 4)
±30
-40 to +85
TO39-3 Case
ELECTRICAL CHARACTERISTICS
Characteristic
Sym Notes Minimum
Typical
Maximum
433.995
±75
Units
fc
1
433.845
MHz
kHz
dB
Center Frequency (+25°C) Absolute Frequency
Relative to 433.920 MHz
∆fc
IL
Insertion Loss
1
2
8.2
12,700
7,700
62
10.0
Quality Factor
Unloaded Q
QU
QL
50 Ω Loaded Q
Temperature Stability
Turnover Temperature
Turnover Frequency
Freq. Temp. Coefficient
T
2, 3
47
1.0
1.4
77
°C
kHz
ppm/°C2
ppm/yr
MΩ
o
fo
fc + 22
0.037
< ±10
FTC
Frequency Aging
4
DC Insulation Resistance between any 2 pins
RF Equivalent RLC Model Motional Resistance
Motional Inductance
Rm
Lm
Cm
Co
2, 5
157
728068
0.184778
1.7
217
2.0
Ω
µH
Motional Capacitance
fF
Shunt Static Capacitance
5
pF
Lid Symbolization
RFM S1207
Notes: (Unless noted otherwise, case temperature, Tc = +25°C ±2°C.)
1. fc is the frequency of minimum IL with the resonator in a 50 Ω test system with VSWR ≤ 1.2:1. (Typically, fOSCILLATOR < fc )
2. Derived mathematically from one or more of the following directly measured parameters: fc, IL, 3 dB bandwidth, fc vs. Tc , and Co .
3. 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 ]. (Note that oscillator To is typically 20°C less than specified resonator To.)
4. Frequency aging is the change in fc with time and is specified at +65°C or less. Aging may exceed the specification for prolonged tempera-
tures above +65°C. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years.
5. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. Co is the
measured static (nonmotional) capacitance between pin 1 and ground or pin 2 and ground and includes case parasitic capacitance.
6. The design, manufacturing process, and specifications of this device are subject to change without notice.
®
7. One or more of the following U. S. Patents apply: 4,454,488 and 4,616,197. RFM is a registered trademark of RF Monolithics, Inc..
8. Equipment utilitizing this device typically requires emissions testing and government approval, which is the responsibility of the equipment
manufacturer.
9. CAUTION: ELECTROSTATIC SENSITIVE DEVICE. Observe precautions for handling.
RS1270.CHP-B-01-121894AC
RSBACK.CHP ©1994 RF Monolithics, Inc.
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