RF Monolithics, Inc.

Phone: (972) 233-2903

Fax: (972) 387-8148

E-mail: info@rfm.com

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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.

HO1081-111201

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Operating Frequency

Absolute Frequency

1, 7

1089.750

1090.0

1090.250

MHz

Tolerance from 1090.0 MHz

∆f

O

±250

kHz

RF Output Power

3, 6

+10

+12

+14

dBm

Discrete Spurious

Second Harmonics

2, 3, 4

-25

-20

dBc

Third and Higher Harmonics

-35

-30

Nonharmonic

<-100

-80

SSB Phase Noise

1 kHz Offset

2, 3, 4

-100

-90

dBc/Hz

10 kHz Offset

-120

-110

RF Impedance

Nominal Impedance

3

50

Ω

Operating Load VSWR

3, 5

1.5:1

DC Power Supply

Operating Voltage

3, 6

11.75

12.0

12.25

VDC

Operating Current

35

40

mA

Operating Ambient Temperature

3, 6

-55

+105

°C

Lid Symbolization (YY=Year, WW=Week)

RFM HO1081 YYWW

Dip 16-8 Case

•

SAW Frequency Stabilization

•

Fundamental-Mode Oscillation at 1090.0 MHz

•

Ideal for IFF Transponder Applications

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 highly-reliable HO1081 is designed for use in identify-friend-or-foe (IFF) radar

transponders in military aviation. Military Screening is available as an option. The HO1081 is a high-perfor-

mance version of the HO1079 oscillator.

Absolute Maximum Ratings

Rating

Value

Units

DC Supply Voltage

0 to +13

VDC

Ambient Temperature

Powered

-55 to +105

°C

Storage

-55 to -125

1090.0 MHz

SAW

Oscillator

HO1081

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.

One or more of the following United States patents apply: 4,616,197; 4,610,681; and

4,761,616.

2.

inal voltage ±0.01 VDC, and load impedance = 50

Ω 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.)

5.

damage will occur for any passive load impedance.)

6.

7.

Applies for any combination of Note 5 and 6 conditions.

BLOCK DIAGRAM

ELECTRICAL CONNECTIONS

RF OUTPUT

V CC

Buffer Amplifier

SAW Oscillator

Top

View

Ground 1

VCC

Ground 2

Ground 7

Output 8

15 Ground

10 Ground

9

Ground