General Description

HMC981 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.

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

Typical Applications

• Microwave Radio & VSAT

• Military & Space

• Test Instrumentation

• Fiber Optic Modulator Driver Biasing

• CATV Laser Driver Biasing

• Cellular Base Station

• Wireless Infrastructure Equipment

HMC981属于集成电路（IC） > 电源管理 - 专用。亚德诺半导体技术有限公司制造生产的HMC981电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。