ZNBG4003

DataSheet.in A Product Line of Diodes Incorporated ZNBG4003 4 STAGE FET LNA BIAS CONTROLLER Summary 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. Features Four stage FET bias controller Operating range of 5.0V 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 (available for external use) Low external component count Pin Assignments G1 D1 VCC D3 G3 D4 G4 RCAL1 CSUB CNB1 RCAL2 CNB2 NEW PRODUCT D2 G2 VCC GND Top View CSUB Applications Two single type Twin LNB’s Twin LNB’s Quad LNB’s Microwave links PMR and Cellular telephone systems Bottom View Single Universal LNB System Diagram   Vertic al Gain stages GaAs FET’s Down Converter IF Switching, gain and control Horizontal ZNBG ZABG 4002 4003 6002 ZXHF 5002 ZNBG4003 Document number: DS35007 Rev. 1 - 2 1 of 7 www.diodes.com August 2010 © Diodes Incorporated DataSheet.in A Product Line o...