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9

HMC346LP3

GaAs MMIC VOLTAGE-VARIABLE

ATTENUATOR, DC - 14 GHz

v02.0604

General Description

Features

Functional Diagram

Wide Bandwidth: DC - 14 GHz

Low Phase Shift vs. Attenuation

30 dB Attenuation Range

Simplified Voltage Control

3 mm x 3 mm x 1 mm SMT Package

Typical Applications

The HMC346LP3 is ideal for:

• Basestation Infrastructure

• Fiber Optics & Broadband Telecom

• Microwave Radio & VSAT

• Military Radios, Radar, & ECM

• Test Instrumentation

The HMC346LP3 is an absorptive Voltage Variable

Attenuator (VVA) in a low cost leadless surface

mount plastic package operating from DC - 14 GHz.

It features an on-chip reference attenuator for use

with an external op-amp to provide simple single

voltage attenuation control, 0 to -3V. The device is

ideal in designs where an analog DC control signal

must control RF signal levels over a 30 dB ampli-

tude range. This VVA is an excellent alternative to

the HMC121C8.

Parameter

Min

Typical

Max

Units

Insertion Loss

DC - 10 GHz

DC - 14 GHz

1.7

2.8

2.2

3.3

dB

dB

Attenuation Range

DC - 10 GHz

DC - 14 GHz

27

22

30

27

dB

dB

Return Loss

DC - 14 GHz

5

10

dB

Switching Characteristics

tRISE, tFALL (10/90% RF):

tON, tOFF (50% CTL to 10/90% RF):

2

8

ns

ns

Input Power for 0.25 dB Compression (0.5 - 8 GHz)

Min. Atten:

Atten. >2 dB:

+8

-4

dBm

dBm

Input Third Order Intercept (0.5 - 8 GHz)

(Two-tone Input Power = -8 dBm Each Tone)

Min. Atten:

Atten. >2 dB:

+25

+10

dBm

dBm