HMC981LP3E
v01.0411 Typical Applications Features • Military & Space Automatic Gate voltage adjustment (No Calibration
required)
Supply Voltage: 4V to 12V • Test Instrumentation Digital Voltage: 3.3V to 5V • Fiber Optic Modulator Driver Biasing
• CATV Laser Driver Biasing Controls both Enhancement and Depletion type
devices • Cellular Base Station Adjustable Drain Current up to 200mA • Wireless Infrastructure Equipment Sink/Source Gate Current Capability • Microwave Radio & VSAT Optional Internal negative voltage generation that
can be disabled to use external negative rail 13
BIAS CONTROLLERS -SMT ACTIVE BIAS CONTROLLER Fast Enable/Disable
Trigger-out Output for Daisy Chain Power-Up and
Power-Down Sequencing
16 Lead 3x3 mm SMT Package: 9 mm² Functional Diagram General Description
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. …