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9

HMC346C8

GaAs MMIC SMT VOLTAGE-

VARIABLE ATTENUATOR, DC - 8 GHz

v00.0504

General Description

Features

Functional Diagram

Wide Bandwidth: DC - 8 GHz

Low Phase Shift vs. Attenuation

30 dB Attenuation Range

Surface Mount Ceramic Package

Typical Applications

The HMC346C8 is ideal for:

• Basestation Infrastructure

• Fiber Optics & Broadband Telecom

• Microwave Radio & VSAT

• Military Radios, Radar, & ECM

• Test Instrumentation

The HMC346C8 is an absorptive Voltage Vari-

able Attenuator (VVA) in a non-hermetic surface-

mount ceramic package operating from DC - 8

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 amplitude range. Applications include

AGC circuits and temperature compensation of

multiple gain stages in microwave radios and test

instrumentation.

Parameter

Min

Typical

Max

Units

Insertion Loss

DC - 6 GHz

DC - 8 GHz

1.9

2.1

2.9

3.1

dB

dB

Attenuation Range

DC - 8 GHz

30

dB

Return Loss

DC - 8 GHz

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

-2

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