HO1045
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SAW Frequency Stabilization
Fundamental-Mode Oscillation at 915.0 MHz
0.8” x 0.5” x 0.25” Metal Dip Case
This 915.0 MHz surface-acoustic-wave (SAW) oscillator is designed for Industrial, Scientific, and Medical
(ISM) applications and as the local oscillator in FCC Part 15.247 radios. Fundamental oscillation at 915.0 MHz
eliminates all internally generated spurious outputs except integral harmonics of 915.0 MHz. The compact
size of the rugged, metal, hermetically-sealed case makes this oscillator suitable for a variety of applications.
915.0 MHz
SAW
Oscillator
Absolute Maximum Ratings
Rating
DC Supply Voltage
Ambient Temperature
Powered
Storage
Value
0 to +13
-40 to +70
-40 to +85
Units
VDC
°C
Dip 14-8 Case
Electrical Characteristics
Characteristic
Operating Frequency
Frequency at +25°C and 12.0 VDC
Tolerance from 915.0 MHz at 25°C
Overall Frequency
RF Output Power
Spurious Outputs
Second Harmonics
Third and Higher Harmonics
RF Impedance
DC Power Supply
Nonharmonic
Nominal Impedance
Operating Load VSWR
Operating Voltage
Operating Current
Operating Ambient Temperature
Lid Symbolization (YY=Year, WW=Week)
Z
O
G
L
V
CC
I
CC
T
A
3, 6
-20
RFMHO1045 YYWW
2, 3, 4
Sym
f
O
∆f
O
P
O
Notes
1, 2
1, 7
2, 3
Minimum
914.750
914.550
+7
-20
-35
<-80
50
11.6
-15
-20
-60
dBc
Ω
1.5:1
12.4
40
+70
VDC
mA
°C
Typical
915
Maximum
915.250
±250
915.300
dBm
Units
MHz
kHz
3
3, 5
3, 6
12
30
BLOCK DIAGRAM
CAUTION: Electrostatic Sensitive Device. Observe precautions for
handling. COCOM CAUTION: Approval by the U.S. Department of
Commerce is required prior to export of this device.
Notes:
1.
2.
3.
4.
One or more of the following United States patents apply: 4,616,197; 4,610,681; and
4,761,616.
Unless noted otherwise, all specifications are listed at T
A
= +25°C ±2°C, V
CC
= nom-
inal voltage ±0.01 VDC, and load impedance = 50
Ω
with VSWR
≤
1.5:1.
The design, manufacturing process, and specifications of this device are subject to
change without notice.
Applies to oscillator only and not to sidebands caused by external electrical or
mechanical sources. (Dedicated external voltage regulation with low-frequency filter-
ing for the DC power supply and proper circuit board layout are recommended for
optimum spectral purity.)
For specified maximum operating load VSWR (any angle) at F
O
. (No instability or
damage will occur for any passive load impedance.)
For any combination of V
CC
and T
A
within the specified operating ranges.
Applies for any combination of Note 5 and 6 conditions.
RF OUTPUT
SAW Oscillator
Buffer Amplifier
V CC
ELECTRICAL CONNECTIONS
VCC 1
Case Ground 2
CC
13 Case Ground
5.
6.
7.
Top
View
Case Ground 6
RF Output 7
9 Case Ground
8
VCC
RF Monolithics, Inc.
Phone: (972) 233-2903
Fax: (972) 387-9148
RFM Europe
Phone: 44 1963 251383
Fax: 44 1963 251510
©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
HO1045-101599
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