HMC980LP4E Datasheet, PDF (1/22 Pages) Hittite Microwave Corporation – ACTIVE BIAS CONTROLLER HIGH CURRENT

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Typical Applications
• Microwave Radio & VSAT
• Military & Space
• Test Instrumentation
• Fiber Optic Modulator Driver Biasing
• CATV Laser Driver Biasing
• Cellular Base Station
• Wireless Infrastructure Equipment
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HMC980LP4E
ACTIVE BIAS CONTROLLER
HIGH CURRENT
Features
• Automatic Gate voltage adjustment (No Calibra-
tion 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
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.
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
2 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com