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HMC812A

RECOMMENDED FOR NEW DESIGNS

GaAs MMIC Voltage-Variable Attenuator, 5 - 30 GHz

Data Sheet Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

Wide Bandwidth: 5 - 30 GHz
High Power Handling: +25 dBm Input P1dB
Excellent Linearity: +28 dBm Input IP3
Wide Attenuation Range: 30 dB
24 Lead Ceramic 4x4 mm SMT Package: 16mm²

The HMC812ALC4 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 -5V to 0V with Vctrl2 fixed at -5V. The control voltage of the 2nd attenuation stage, Vctrl2, should then be varied from -5V to 0V, with Vctrl1 fixed at 0V. The HMC812ALC4 is housed in a RoHS compliant 4x4 mm QFN leadless ceramic package.

Furthermore, 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.

Applications

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

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

HMC812ALC4: GaAs MMIC Voltage-Variable Attenuator, 5 - 30 GHz Data Sheet 08/27/2015

Evaluation Design File 1

HMC812A Gerber Files 07/22/2025

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
HMC812ALC4	24-Lead LCC (4 x 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
HMC812ALC4TR	24-Lead LCC (4 x 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

S-Parameter 1

HMC812A S-Parameters

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

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