Diodes ZNBG4003 - Manual

ZNBG4003
Document number: DS35007 Rev. 1 - 2
1 of 6
www.diodes.com
June 2012
© Diodes Incorporated
NEW PROD
UC
T
A Product Line of
Diodes Incorporated
ZNBG4003
4 STAGE LNA BIAS CONTROLLER
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.
Features
•
Four stage FET bias controller
• Operating range of 4.75V 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
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
Top view
Bottom view
Applications
• Two single type Twin LNB’s
• Twin LNB’s
• Quad
LNB’s
• Microwave
links
•
PMR and Cellular telephone systems
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Twin Universal LNB System Diagram