深圳市华兴微电子有限公司 （非本站正式会员）

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
• Over/Under Current Alarm with 
   built-in hystresis
• Small Footprint: 24 Lead 
   4 mm x 4 mm QFN Package

Typical Applications

• Microwave Radio & VSAT
• Military & Space
• Test Instrumentation
• Fiber Optic Modulator
   Driver Biasing
• CATV Laser Driver Biasing
• Cellular Base Station
• Wireless Infrastructure Equipment

Functional Diagram

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 employed to prevent RF performance degradation due to such variations.

The HMC980LP4E is housed in an RoHS compliant 4x4 mm QFN leadless package with an exposed backside pad to improve thermal characteristics.