HO1126
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•
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SAW Frequency Stabilization
Fundamental-Mode Oscillation at 1090.0 MHz
Ideal for IFF Transponder Applications
1090.0 MHz
SAW
Oscillator
The frequency of this oscillator is stabilized by surface-acoustic-wave (SAW) technology. This results in ex-
cellent performance from a compact, rugged, hermetically-sealed oscillator operating at the fundamental fre-
quency of 1090.0 MHz. The high-reliablity HO1126 is designed for use in identify-friend-or-foe (IFF) radar
transponders in military aviation. Military Screening is available as an option. The HO1126 is a surface-mount-
able flatpack version of the HO1081 oscillator.
Absolute Maximum Ratings
Rating
Value
Units
DC Supply Voltage
0 to +13
VDC
Ambient Temperature
Powered
Storage
-55 to +105
-55 to -125
FP 18-8 Case
°C
Electrical Characteristics
Characteristic
Absolute Frequency
Sym
Notes
Minimum
Typical
Maximum
1090.250
±250
Units
MHz
kHz
1090.000
Operating Frequency
f
1089.750
O
1, 7
Tolerance from 1090.0 MHz
Df
O
+10
RF Output Power
Discrete Spurious
P
3, 6
+12
-25
-35
+13
-20
dBm
O
Second Harmonics
2, 3, 4
dBc
Third and Higher Harmonics
-30
-80
Nonharmonic
1 kHz Offset
<-100
-100
-90
SSB Phase Noise
2, 3, 4
dBc/Hz
10 kHz Offset
-120
50
-110
Nominal Impedance
RF Impedance
Z
3
W
O
Operating Load VSWR
Operating Voltage
Operating Current
G
3, 5
1.5:1
L
DC Power Supply
11.75
-55
12.25
V
12.0
35
VDC
mA
°C
CC
CC
3, 6
3, 6
40
I
Operating Ambient Temperature
T
+105
A
Lid Symbolization (YY=Year, WW=Week)
RFM HO1126 YYWW
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.
V
CC
Notes:
1. One or more of the following United States patents apply: 4,616,197; 4,610,681; and
RF OUTPUT
4,761,616.
SAW Oscillator
Buffer Amplifier
2. Unless noted otherwise, all specifications are listed at T = +25°C ±2°C, V = nom-
A
CC
inal voltage ±0.01 VDC, and load impedance = 50 W with VSWR £ 1.5:1.
3. The design, manufacturing process, and specifications of this device are subject to
change without notice.
4. 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.)
ELECTRICAL CONNECTIONS
Ground 1
18 Vcc
Case Ground 2
17 Case Ground
Top
View
5. For specified maximum operating load VSWR (any angle) at F . (No instability or
O
damage will occur for any passive load impedance.)
Case Ground 8
RF Output 9
11 Case Ground
10 Ground
6. For any combination of V and T within the specified operating ranges.
CC
A
7. Applies for any combination of Note 5 and 6 conditions.
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
HO1126-101899
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©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc.