RS1094B
•
•
•
Designed for 915 MHz FCC Part 15 Transmitters
Quartz Stability
Surface-mount, Solder Seal Package with 5.2 x 4.8 mm Footprint
915.0 MHz
SAW
Resonator
The RS1094B is a surface mount, solder sealed resonator. It provides reliable, fundamental-mode, quartz
frequency stabilization of fixed-frequency oscillators operating at or near 915 MHz. This resonator is
designed specifically for use in low-power transmitters operating in the USA under FCC Part 15.249 regula-
tions. It is also suitable for a variety of other oscillator applications.
Absolute Maximum Ratings
Rating
Value
+5
Units
dBm
VDC
°C
CW RF Power Dissipation (See: Typical Test Circuit)
DC Voltage Between Any Two Pins (Observe ESD Precautions)
Case Temperature
±30
SM5248-8 Case
-40 to +85
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency
f
Absolute Frequency
914.850
915.150
MHz
kHz
C
2, 3, 4, 5,
Df
Tolerance from 915.000 MHz
±150
9
C
Phase at Center Frequency (see typical circuit)
Insertion Loss
0°
8
IL
2, 5, 6
5, 6, 7
dB
Q
Quality Factor
Unloaded Q
6000
3500
25
U
Q
50 W Loaded Q
L
T
Temperature Stability
Turnover Temperature
Turnover Frequency
Frequency Temp. Coefficient
Absolute Value during First Year
10
+40
°C
O
f
915
0.032
10
6, 7, 8
kHz
O
2
FTC
ppm/°C
|f |
Frequency Aging
6
5
ppm/yr
MW
W
A
DC Insulation Resistance between Any Two Pins
1.0
RF Equivalent RLC
R
Motional Resistance
Motional Inductance
Motional Capacitance
Shunt Static Capacitance
125
130
0.2
1.2
M
L
5, 7, 9
5, 6, 9
µH
M
C
fF
M
C
pF
O
Lid Symbolization (in addition to Lot and/or Date Codes)
TBD
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1. Frequency aging is the change in f with time and is specified at +65°C or less. Aging may exceed the specification for prolonged temperatures
C
above +65°C. Typically, aging is greatest the first year after manufacture, decreasing in subsequent years.
2. The frequency f is the frequency of minimum IL with the resonator in the specified test fixture in a 50 W test system with VSWR £ 1.2:1.
C
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 T = +25°C± 2°C
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: f , IL, 3 dB bandwidth, f versus T , and C .
C
C
C
O
8. Turnover tempearture, T , is the temperature of maximum (or turnover) frequency, f . The nominal frequency at any case temperature, T , may be
O
O
C
2
calculated from: f = f [1 - FTC (T - T ) ].
O
O
C
9. This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance
is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case para-
C
O
sitic 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
RS1094B-051800
Page 1 of 2
©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
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