GaAs MMIC Voltage - Variable Attenuator, 10 - 40 GHz

The HMC985ALP4KE is an absorptive Voltage Variable Attenuator (VVA) which operates from 10 - 40 GHz and is ideal in designs where an analog DC control signal must be used to control RF signal levels over a 35 dB dynamic range. It features two shunt-type attenuators which are controlled by two analog voltages, Vctl1 and Vctl2. Optimum linearity performance of the attenuator is achieved by first varying Vctl1 of the first attenuation stage from -5V to 0V with Vctl2 fixed at -5V. The control voltage of the second attenuation stage, Vctl2, should then be varied from -5V to 0V with Vctl1 fixed at 0V.

If the Vctl1 and Vctl2 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

* Wide Bandwidth: 10 - 40 GHz

* Excellent Linearity: +32 dB Input IP3

* Wide Attenuation Range: 35 dB

* No External Matching

* 24 Lead 4x4 mm SMT Package: 16 mm²