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For price, delivery, and to place orders: Analog Devices, Inc., One Analog Way, Wilmington, MA 01887

Phone: 781-937-1428 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D

HMC981LP3E

v02.1222

General Description

ACTIVE BIAS CONTROLLER

Functional Diagram

Typical Applications

HMC981LP3E is an active bias controller that

automatically adjusts the gate voltage of an external

amplifier to achieve constant bias current. It can be

used to bias any enhancement and depletion type

amplifiers operating in Class-A regime with Drain

voltages from 4V to 12V and drain currents up to

200mA, offering a complete biasing solution.

HMC981LP3E 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 HMC981LP3E is housed in an RoHS compliant

3x3 mm QFN leadless package with an exposed

backside pad to improve thermal characteristics.

• Microwave Radio & VSAT

• Military & Space

• Test Instrumentation

• Fiber Optic Modulator Driver Biasing

• CATV Laser Driver Biasing

• Cellular Base Station

• Wireless Infrastructure Equipment

Features

Automatic Gate voltage adjustment (No Calibration

required)

Supply Voltage: 4V to 12V

Digital Voltage: 3.3V to 5V

Controls both Enhancement and Depletion type

devices

Adjustable Drain Current up to 200mA

Sink/Source Gate Current Capability

Optional Internal negative voltage generation that

can be disabled to use external negative rail

Fast Enable/Disable

Trigger-out Output for Daisy Chain Power-Up and

Power-Down Sequencing

16 Lead 3x3 mm SMT Package: 9 mm²

For price, delivery, and to place orders:

Analog Devices, Inc., One Analog Way, Wilmington, MA 01887

Phone: 781-937-1428 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.