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GaAs MMIC SMT VOLTAGE-VARIABLE

ATTENUATOR, DC - 8 GHz

v07.1008

General Description

Features

Functional Diagram

Wide Bandwidth: DC - 8 GHz

Low Phase Shift vs. Attenuation

32 dB Attenuation Range

Typical Applications

This attenuator is ideal for use as a VVA

for DC - 8 GHz applications:

• Point-to-Point Radio

• VSAT Radio

The HMC346MS8G & HMC346MS8GE are absorp-

tive Voltage Variable Attenuators (VVA) in 8 lead sur-

face-mount packages 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 con-

trol RF signal levels over a 30 dB amplitude range.

Applications include AGC circuits and temperature

compensation of multiple gain stages in microwave

point-to-point and VSAT radios.

Parameter

Min

Typical

Max

Units

Insertion Loss

DC - 8 GHz

1.5

2.5

dB

Attenuation Range

DC - 8 GHz

27

32

dB

Return Loss

DC - 8 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

-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