深圳市华兴微电子有限公司 （非本站正式会员）

Features

• 1 dB LSB Steps to 31 dB
• Single Positive Control Line Per Bit
• ±1 dB Typical Bit Error
• High Input IP3: +43 dBm
• Die Size: 2.36 x 1.02 x 0.1 mm

Typical Applications

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

Functional Diagram

General Description

The HMC939 die is a broadband 5-bit GaAs IC digital attenuator MMIC chip. Covering 0.1 to 40 GHz, the insertion loss is less than 5 dB typical. The attenuator bit values are 1.0 (LSB), 2, 4, 8, 16 for a total attenuation of 31 dB. Attenuation accuracy is excellent at less than ±1.0 dB typical step error with an IIP3 of +43 dBm. Five control voltage inputs, toggled between +5V and 0V, are used to select each attenuation state.