9

9 - 50

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

Ku-Band MMIC VCO with

DIVIDE-BY-8, 14.0 - 15.0 GHz

v02.0805

General Description

Features

Functional Diagram

The HMC398QS16G & HMC398QS16GE are single

chip GaAs InGaP Heterojunction Bipolar Transis-

tor (HBT) MMIC VCOs. The HMC398QS16G &

HMC398QS16GE

integrate

resonators,

negative

resistance devices, varactor diodes and divide-by-8

prescalers. The VCO’s phase noise performance is

excellent over temperature, shock, and process due

to the oscillator’s monolithic structure. Power output

is +7 dBm typical from a 5V supply voltage. The

voltage controlled oscillator is packaged in a low

cost, surface mount 16 leaded QSOP package with

an exposed base for improved RF and thermal per-

formance. The HMC398QS16G & HMC398QS16GE

require no external components

Pout: +7 dBm

Phase Noise: -105 dBc/Hz @100 KHz Typ.

No External Resonator Needed

Single Supply: 5V @ 325 mA

QSOP16G SMT Package

Typical Applications

Low noise MMIC VCO w/Divide-by-8

for Ku-Band applications such as:

• Point-to-Point Radios

• Point-to-Multi-Point Radios / LMDS

• VSAT

Vcc1, Vcc2 = +5.0V

Parameter

Min.

Typ.

Max.

Units

Frequency Range

14.0 - 15.0

GHz

Power Output

RF Output

Divided Output

+3

-9

+7

-6

dBm

dBm

SSB Phase Noise @ 100 kHz Offset, Vtune= +5V @ RF Output

-105

dBc/Hz

Tune Voltage

Vtune

1.0

10.0

V

Supply Current

Icc 1 (Digital)

Icc 2 (RF)

65

260

mA

mA

Tune Port Leakage Current (Vtune= 10V)

10

μA

Output Return Loss

2dB

Harmonics/Subharmonics

1/2

3/2

2nd

5/2

-20

-30

-12

-40

dBc

dBc

dBc

dBc

Pulling (into a 2.0:1 VSWR)

4MHz pp

Pushing @ Vtune= 5V

30

MHz/V

Frequency Drift Rate

1.5

MHz/°C