znbg4003 Diodes, Inc., znbg4003 Datasheet

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znbg4003

Manufacturer Part Number
znbg4003
Description
4 Stage Fet Lna Bias Controller
Manufacturer
Diodes, Inc.
Datasheet
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.
Single Universal LNB System Diagram
Features
Applications
ZNBG4003
Document number: DS35007 Rev. 1 - 2
 
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
Low external component count
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)
Two single type Twin LNB’s
Twin LNB’s
Quad LNB’s
Microwave links
PMR and Cellular telephone systems
Gain stages
Gain stages
GaAs FET’s
GaAs FET’s
ZABG
ZNBG
ZABG
ZABG
4002
4003
6002
6002
Converter
Converter
Down
Down
IF Switching, gain
IF Switching, gain
ZXHF
ZXHF
ZXHF
ZXHF
5002
5002
5002
5002
and control
and control
www.diodes.com
1 of 7
Pin Assignments
4 STAGE FET LNA BIAS CONTROLLER
GND
Diodes Incorporated
V
G2
D2
CC
A Product Line of
Bottom View
Top View
C
SUB
D4
G3
G4
R
CAL1
ZNBG4003
© Diodes Incorporated
August 2010

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znbg4003 Summary of contents

Page 1

... 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. ...

Page 2

... Furthermore if the negative rail experiences a fault condition, such as overload or short circuit, the drain supply to the FETs will shut down avoiding excessive current flow. To minimise PCB space ZNBG4003 is packaged in the 16 pin 3mm x 3mm QFN package. Device operating temperature is -40°C to 85°C to suit a wide range of environmental conditions ...

Page 3

... V G(NOISE) = 10nF and R of value 39k , wired from pins R CAL1 CAL2 sets the drain currents of FETs 2 and 4. CAL2 www.diodes.com A Product Line of Diodes Incorporated ZNBG4003 Unit °C ° 39k (setting I to 10mA) unless otherwise stated) CAL D Min. Typ. Max. ...

Page 4

... Stripline Elements ZNBG4003 Document number: DS35007 Rev 25° 5.0V) AMB CC C1 10nF D2 G2 ZNBG4003 Vcc Gnd C2 10nF CNB 47nF CSUB 47nF www.diodes.com A Product Line of Diodes Incorporated ZNBG4003 Vcc Rcal1 RCAL2 39k RCAL1 39k August 2010 © Diodes Incorporated ...

Page 5

... To ease PCB layout, the pinout for the ZNBG4003 includes two Vcc pins. These pins are internally connected so only one of the pins needs to be powered for the device to function probable that the extra pin will help avoid the need for trace cross-over components or ground plane disruption from reverse side PCB links ...

Page 6

... Package ZNBG4003JA16TC QFN1633 Marking Information ZNBG4003 Document number: DS35007 Rev Product Line of Diodes Incorporated Reel Size Tape Width (inches) 13 Pin 1 ZNBG Part Name 4003 Date Code YYWW Year/Week www.diodes.com ZNBG4003 Quantity (mm) (per reel) 8 3000 August 2010 © Diodes Incorporated ...

Page 7

... Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com ZNBG4003 Document number: DS35007 Rev Product Line of Diodes Incorporated IMPORTANT NOTICE LIFE SUPPORT www.diodes.com ZNBG4003 August 2010 © Diodes Incorporated ...

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