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HMC712

Voltage Variable Attenuator Chip, 5 - 30 GHz

Product Details

Data Sheet
ECCN: EAR99

Quality & Reliability

Qualification Test Reports
Waffle-Pak & Gel-Pak

Press & Media

Product Press Release
Freq. (GHz) Function Loss (dB) Atten. Range (dB) IIP3 (dBm) Control Input (Vdc) Package
5 - 30 Analog VVA 2.5 0 to 30 32 0 to -3V Chip

Features

• Wide Bandwidth: 5 - 30 GHz
• Excellent Linearity: +28 dBm Input P1dB
• Wide Attenuation Range: 30 dB
• Compact Die Size: 1.4 x 1.2 x 0.1 mm

Typical Applications

• Point-to-Point Radio
• VSAT Radio
• Test Instrumentation
• Microwave Sensors
• Military, ECM & Radar

Functional Diagram

General Description

The HMC712 die is an absorptive Voltage Variable Attenuator (VVA) which operates from 5 - 30 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 30 dB amplitude range. It features two shunt-type attenuators which are controlled by two analog voltages, Vctrl1 and Vctrl2. Optimum linearity performance of the attenuator is achieved by first varying Vctrl1 of the 1st attenuation stage from -3V to 0V with Vctrl2 fixed at -3V. The control voltage of the 2nd attenuation stage, Vctrl2, should then be varied from -3V to 0V, with Vctrl1 fixed at 0V.


However, if the Vctrl1 and Vctrl2 pins are connected together it is possible to achieve the full analog attenuation range with only a small degradation in input IP3 performance. Applications include AGC circuits and temperature compensation of multiple gain stages in microwave point-to-point and VSAT radios.