ZNBG4003 (Obsolete)

Description

The ZNBG4003 is a four stage depletion mode FET bias controller intended primarily for satellite Low Noise Block’s (LNB’s), but its also suitable for other LNA applications such as those in found in PMR’s and microwave links. The ZNBG4003 provides each FET with a negative gate voltage and positive drain voltage with user programmable drain current.

Feature(s)

Four stage FET bias controller

Operates from supplies of 4.74 to 8.0V

FET drain voltages set at 2.0V

FET drain current selectable from 0 to 15mA

Allows first and second stage FETs to be run at different (optimum) drain currents

FET drain voltages and currents stable over temperature

FETs protected against overstress during power-up and power-down.

Internal negative supply generator allowing single supply operation

Low external component count

Application(s)

LNB