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v01.0911 BIAS CONTROLLERS -SMT Typical Applications ACTIVE BIAS CONTROLLER
HIGH CURRENT
Features
• Automatic Gate voltage adjustment (No Calibration required) Military & Space • Supply Voltage (5V to 16.5V) • Test Instrumentation • • Fiber Optic Modulator Driver Biasing Bias both Enhancement or Depletion type
devices • CATV Laser Driver Biasing • Cellular Base Station • Wireless Infrastructure Equipment • Microwave Radio & VSAT • Functional Diagram • 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 General Description
HMC980LP4E 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, HMC980LP4E 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.
HMC980LP4E achieves excellent bias stability over
supply, temperature and process variations, and
eliminates the required calibration procedures usually …