HMC980 Description

HMC980 is an active bias controller that can automatically adjust the gate voltage of an external amplifier to achieve constant bias current. With an integrated controller, HMC980 achieves safe power on/ off, disable/enable and automatic supply sequencing ensuring the safety of the external amplifier. It can be used to bias any enhancement and depletion type amplifier operating in Class-A regime with drain voltages (VDRAIN) from 5V to 16.5V and drain currents (IDRAIN) up to 1.6 A, offering a complete biasing solution.
HMC980 achieves excellent bias stability over supply, temperature and process variations, and eliminates the required calibration procedures usually employed to prevent RF performance degradation due to such variations.All data shown herein is taken with appropriate probes.

HMC980 Features

? Automatic Gate voltage adjustment (No Calibration required)
? Supply Voltage (5V to 16.5V)
? Bias both Enhancement or Depletion type devices
? Adjustable Drain Current up to 1.6 A
? Sink or source gate current
? Internal negative voltage generation
? Can be disabled to use external negative rail
? Fast Enable/Disable
? Trigger-out Output for Daisy Chain
? Power-Up and Power-Down Sequencing
? Over/Under Current Alarm with built-in hystresis
? 24 Lead 4mmx4mm QFN Package: 16mm2

HMC980 Applications

? Microwave Radio & VSAT
? Military & Space
? Test Instrumentation
? Fiber Optic Modulator Driver Biasing
? CATV Laser Driver Biasing
? Cellular Base Station