MICROWAVE CORPORATION

15 - 14

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

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order Online at www.hittite.com

15

MMIC VCO w/ BUFFER

AMPLIFIER, 2.25 - 2.5 GHz

v01.0604

General Description

Features

Functional Diagram

The HMC385LP4 is a GaAs InGaP Heterojunc-

tion Bipolar Transistor (HBT) MMIC VCO with

integrated resonator, negative resistance device,

varactor diode, and buffer amplifier. Covering 2.25

to 2.5 GHz, the VCO’s phase noise performance

is excellent over temperature, shock, vibration

and process due to the oscillator’s monolithic

structure. Power output is 4.5 dBm typical from

a single supply of 3V @ 35mA. The voltage con-

trolled oscillator is packaged in a low cost lead-

less QFN 4 x 4 mm surface mount package.

Pout: +4.5 dBm

Phase Noise: -115 dBc/Hz @100 KHz

No External Resonator Needed

Single Supply: 3V @ 35 mA

Typical Applications

Low noise MMIC VCO w/Buffer Amplifier for:

• Wireless Infrastructure

• Industrial Controls

• Test Equipment

• Military

Parameter

Min.

Typ.

Max.

Units

Frequency Range

2.25 - 2.5

GHz

Power Output

1.5

4.5

dBm

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

-115

dBc/Hz

Tune Voltage (Vtune)

0

10

V

Supply Current (Icc) (Vcc = +3.0V)

35

mA

Tune Port Leakage Current

10

µA

Output Return Loss

9dB

Harmonics

2nd

3rd

-7

-23

dBc

dBc

Pulling (into a 2.0:1 VSWR)

2.0

MHz pp

Pushing @ Vtune= +5V

-2

MHz/V

Frequency Drift Rate

0.25

MHz/°C

HMC385LP4