HMC712

HMC712 v00.1008 GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, 5 - 30 GHz 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 1 ATTENUATORS - ANALOG - CHIP Typical Applications The HMC712 is ideal for: Point-to-Point Radio VSAT Radio Test Instrumentation Microwave Sensors Military, ECM & Radar www.datasheet4u.com 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. Electrical Specifi cations, TA = +25° C, 50 Ohm system Parameter Insertion Loss Attenuation Range Input Return Loss Output Return Lo...