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HMC812LC4

Voltage Variable Attenuator SMT, 5 - 30 GHz

Product Details

Data Sheet
Package Layout
S-Parameters
Tape & Reel
ECCN: EAR99

Quality & Reliability

Environmental Data Sheet
Qualification Test Reports

Press & Media

Product Press Release
Freq. (GHz) Function Loss (dB) Atten. Range (dB) IIP3 (dBm) Control Input (Vdc) Package
5 - 30 Analog VVA 2 0 to 30 28 0 to -3V LC4

Features

• Wide Bandwidth: 5 - 30 GHz
• Excellent Linearity: +25 dBm Input P1dB
• Wide Attenuation Range: 30 dB
• 24 Lead Ceramic 4x4mm SMT
   Package: 16mm²

Typical Applications

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

Functional Diagram

General Description

The HMC812LC4 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. The HMC812LC4 is housed in a RoHS compliant 4x4 mm QFN leadless ceramic package.


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.