Preliminary
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
E-mail: info@rfm.com
Page 1 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RP1094B-121701
Electrical Characteristics
Characteristic
Sym
Notes
Minimum
Typical
Maximum
Units
Center Frequency
Absolute Frequency
f
C
2, 3, 4, 5,
914.850
915.150
MHz
Tolerance from 915.000 MHz
f
C
150
kHz
Insertion Loss
IL
2, 5, 6
8
9
dB
Quality Factor
Unloaded Q
Q
U
5, 6, 7
6000
50
Loaded Q
Q
L
3500
Temperature Stability
Turnover Temperature
T
O
6, 7, 8
10
25
+85
C
Turnover Frequency
f
O
915
kHz
Frequency Temp. Coefficient
FTC
0.032
ppm/C
2
Frequency Aging
Absolute Value during First Year
|f
A
|
6
10
ppm/yr
DC Insulation Resistance between Any Two Pins
5
1.0
M
RF Equivalent RLC
Motional Resistance
R
M
5, 7, 9
125
Motional Inductance
L
M
130
H
Motional Capacitance
C
M
0.2
fF
Shunt Static Capacitance
C
O
5, 6, 9
1.2
pF
Lid Symbolization (in addition to Lot and/or Date Codes)
396
SM5248-8 Case
Designed for 915 MHz FCC Part 15 Transmitters
Quartz Stability
Surface-mount, Solder Seal Package with 5.2 x 4.8 mm Footprint
The RP1094B 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 with a 180 nominal
phase at resonance. This resonator is designed specifically for use in low-power transmitters operating in the
USA under FCC Part 15.249 regulations. It is also suitable for a variety of other oscillator applications.
Absolute Maximum Ratings
Rating
Value
Units
CW RF Power Dissipation (See: Typical Test Circuit)
+13
dBm
DC Voltage Between Any Two Pins (Observe ESD Precautions)
30
VDC
Case Temperature
-40 to +85
C
915.0 MHz
SAW
Resonator
RP1094B
CAUTION: Electrostatic Sensitive Device. Observe precautions for handling.
Notes:
1.
Frequency aging is the change in f
C
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 in subsequent years.
2.
The frequency f
C
is the frequency of minimum IL with the resonator in the specified test fixture in a 50
test system with VSWR
1.2:1.
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
C
= +25C 2C
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
C
, IL, 3 dB bandwidth, f
C
versus T
C
, and C
O
.
8.
Turnover tempearture, T
O
, is the temperature of maximum (or turnover) frequency, f
O
. The nominal frequency at any case temperature, T
C
, may be
calculated from: f = f
O
[1 - FTC (T
O
- T
C
)
2
].
9.
This equivalent RLC model approximates resonator performance near the resonant frequency and is provided for reference only. The capacitance
C
O
is the measured static (nonmotional) capacitance between either pin 1 and ground or pin 2 and ground. The measurement includes case para-
sitic capacitance.
915.0 MHz SAW Resonator
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-8148
E-mail: info@rfm.com
Page 2 of 2
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
http://www.rfm.com
1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.
RP1094B-121701
Electrical Connections
This two-port, eight-terminal solder seal resonator is bidirectional. However,
impedances and circuit board parasitics may not be symmetrical, requiring
slightly different oscillator component-matching values.
Typical Circuit
Case Design
Pin
Connection
1
Ground
2
Output Return
3
Input Return
4
Ground
5
Ground
6
Input
7
Output
8
Ground
5
6
7
4
8
3
2
1
Input Output
Input
Return
Output
Return
45
C
B
A
D
F
G
I
H
E
3
2
4
7
8
5
6
1
TOP VIEW
BOTTOM VIEW
J
Dimensions
Millimeters
Inches
Min
Nom
Max
Min
Nom
Max
A
5.21
5.33
5.46
0.205
0.210
0.215
B
4.83
4.95
5.08
0.190
0.195
0.200
C
0.38
0.51
0.64
0.015
0.020
0.025
D
1.07
1.19
1.32
0.042
0.047
0.052
E
1.14
1.27
1.40
0.045
0.050
0.055
F
0.58
0.71
0.84
0.023
0.028
0.033
G
1.07
1.19
1.32
0.042
0.047
0.052
H
1.32
1.45
1.57
0.052
0.057
0.062
I
2.54
2.67
2.79
0.100
0.105
0.110
J
1.52
1.78
2.03
0.060
0.070
0.080
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