9.85 GHz to 20.5 GHz,

Wideband, MMIC VCO

Data Sheet

ADF5709

Rev. A

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FEATURES

Wide output frequency range: 9.85 GHz to 20.5 GHz

Wide tuning bandwidth

Low single sideband phase noise: −83 dBc/Hz at 100 kHz offset

No external resonator needed

24-terminal, 3.90 mm × 3.90 mm, ceramic LCC package

APPLICATIONS

Industrial and medical equipment

Test and measurement equipment

Military radars, electronic warfare (EW), and electronic

countermeasures (ECMs)

Point to point and multipoint radios

Very small aperture terminals (VSATs)

Wireless communication infrastructure

FUNCTIONAL BLOCK DIAGRAM

2

NC

3

NC

4

5

NC

6

NC

1

NC

13

PACKAGE

BASE

NC

14

GND

GND

15

RFOUT

16

GND

17

NC

18

NC

19

20

21

22

23

24

7

8 9 10 11 12

ADF5709

Figure 1.

GENERAL DESCRIPTION

The ADF5709 wideband, monolithic microwave integrated

circuit (MMIC), voltage controlled oscillator (VCO) supports

maintaining −83 dBc/Hz phase noise at 100 kHz offset without

subharmonic tones. The wide frequency tuning range and low

phase noise allow phase-locked loop (PLL) solutions for a variety

of frequency bands and limit the need for multiple narrow-band

VCOs. The broad frequency coverage reduces the board design

complexity and simplifies the bill of materials when designing

RF and microwave applications.

The VCO operates from a single 5 V supply and consumes

only 70 mA of supply current that results in minimal power

dissipation. The ADF5709 low power consumption is ideal

for high performance applications with limited or no airflow.

The monolithic construction of the VCO allows optimal output

power and noise characteristics over temperature variations.

The VCO is fully integrated and incorporates a resonator, a

negative resistance device, and a varactor diode that minimize

the number of external components and reduces board space.

enables high tuning speed and modulation bandwidth, which

allows faster frequency sweeps and lock times when used as

part of a frequency synthesizer, for example, in radar or in test

and measurement applications.

The ADF5709 is encapsulated into a tiny, 3.90 mm × 3.90 mm,

RoHS compliant, ceramic leadless chip carrier (LCC) package.

The package includes through vias to the exposed pad,

enhancing thermal characteristics.

The small size, optimal noise performance, low power

consumption, and wide tuning range of the ADF5709 make

the device ideal for many applications requiring flexibility,

high performance, a small footprint, and a tight power budget.

The ADF5709 is pin to pin compatible with the HMC733 and

other Analog Devices, Inc., wideband VCOs.