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©2010 by RF Monolithics, Inc.

HO1091 - 10/27/10

Electrical Characteristics

Characteristic

Sym

Notes

Minimum

Typical

Maximum

Units

Operating Frequency

Absolute Frequency

1, 7

1089.2

1090.0

1090.8

MHz

Tolerance from 1090.0 MHz

±800

kHz

RF Output Power

3, 6

+10

+12

+13

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

-85

dBc/Hz

10 kHz Offset

-110

RF Impedance

Nominal Impedance

350

Ω

Operating Load VSWR

3, 5

1.5:1

DC Power Supply

Operating Voltage

3, 6

11.75

12.00

12.25

VDC

Operating Current

37

40

mA

Operating Ambient Temperature

3, 6

-40

+85

°C

Lid Symbolization (YY=Year, WW=Week)

RFM HO1091 YYWW

Dip 16-8 Case

•

SAW Frequency Stabilized

•

Fundamental-mode Oscillation at 1090 MHz

•

Ideal for ATC Transponder Applications

•

Complies with Directive 2002/95/EC (RoHS)

The frequency of this oscillator is stabilized by UHF surface-acoustic-wave (SAW) technology, providing ex-

cellent performance in a compact, rugged oscillator operating at the fundamental frequency of 1090 MHz. The

highly-reliable HO1091 is designed for use in Air Traffic Control Transponders.

Absolute Maximum Ratings

Rating

Value

Units

DC Supply Voltage

0 to +13

VDC

Ambient Temperature

Powered

-40 to +85

°C

Storage

-55 to +125

1090 MHz

SAW

Oscillator

HO1091

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: 4,760,352; 5,787,117; and

7,260,375.

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.

age 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

VCC

Buffer Amplifier

SAW Oscillator

Top

View

Ground 1

VCC

Ground 2

Ground 7

Output 8

15 Ground

10 Ground

9

Ground

2 >