Diodes ZNBG3118 Manuel d'utilisateur télécharger pdf

ZNBG3118

Document number: DS32049 Rev. 2 - 2

1 of 10

www.diodes.com

February 2010

NEW PRODUCT

Product Line o

Diodes Incorporated

LNA GaAs FET BIAS CONTROLLER WITH POLARIZATION AND BAND SELECT

Summary

The ZNBG3118 is a bias and control solution designed for Satellite Low Noise Blocks (LNB’s). Providing three bias stages to

power control and protect the GaAs or HEMT FET low noise amplifier’s (LNA’s). The ZNBG3118 integrates an accurate voltage

detector to select the LNB polarisation channel and an advanced tone detector to select the local oscillator (LO) for band

switching.

Features

• Provides bias for up to three GaAs and HEMT FETs

• Dynamic FET protection and temperature compensation

• Drain current set by external resistor

• Regulated negative rail generator requires only 2 external

capacitors

• Accurate voltage detector and polarisation switch for

LNB’s

• 22kHz tone detection for band switching with rejection of

unwanted signals

• Band switch supports both Discrete, MIMIC and PLL

local oscillators

• Compliant with ASTRA control specifications

• Low current for power efficient systems

• Wide operating supply range of 3.3V to 8V

Pin Assignments

Application

• Single Output LNB’s

• Two single type twin LNB’s

• Low power LNB’s

• PLL Single LNB’s

Single Universal LNB System Diagram

Top View

Bottom View

GND

NB1

NB2

D12

POL

CAL

SUB

1 2 3 4 5 6 7 8 9 10

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Page 2 - Device Description

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Page 5 - Drain Current vs R

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Page 7 - Functional Tables

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Page 8 - Applications Information

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Page 9 - Date Code

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Page 10 - NEW PRODUCT

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