Aerospace, GaAs, MMIC, Voltage Variable Attenuator, 20 GHz to 50 GHz

The ADH985S is an absorptive, voltage variable attenuators (VVAs) which

operate from 20 GHz to 50 GHz and is ideal in designs when 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

attenuators is achieved by first varying Vctl1 of the first attenuation stage

from −3 V to 0 V with Vctl2 fixed at −3 V. The control voltage of the second

attenuation stage, Vctl2, should then be varied from −3 V to 0 V with Vctl1

fixed at 0 V. However, 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

* Point-to-Point Radio

* Sensors

* Military & Space

* Wide Bandwidth: 20 GHz to 50 GHz

* Excellent Linearity: +32 dBm Input IP3

* Wide Attenuation Range: 35 dB