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HMC425

0.5 dB LSB 6-Bit Digital Attenuator Chip, 2.4 - 8.0 GHz

Product Details

Data Sheet
Application Notes
S-Parameters
ECCN: EAR99

Quality & Reliability

Qualification Test Reports
Waffle-Pak & Gel-Pak

Press & Media
Freq. (GHz) Function Loss (dB) Atten. Range (dB) IIP3 (dBm) Control Input (Vdc) Package
2.4 - 8.0 6-Bit Digital 3.5 0.5 to 31.5 40 0/ +5V Chip

Features

• 0.5 dB LSB Steps to 31.5 dB
• Single Control Line Per Bit
• ±0.5 dB Typical Bit Error
• Die Size: 0.85 x 1.5 x 0.1 mm

Typical Applications

• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
• Space Applications

Functional Diagram

HMC425 Functional Diagram

General Description

The HMC425 die is a broadband 6-bit GaAs IC digital attenuator MMIC chip. Covering 2.4 to 8.0 GHz, the insertion loss is less then 3.5 dB typical. The attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and 16 dB for a total attenuation of 31.5 dB. Attenuation accuracy is excellent at ±0.5 dB typical step error with an IIP3 of +40 dBm. Six control voltage inputs, toggled between 0 and +3 to +5V, are used to select each attenuation state. A single Vdd bias of +3 to +5V is required.