Diodes ZLNB1001 User Manual download pdf

Issue 1 - September 2005 1 www.zetex.com

ZLNB1001

DBS tone and polarity multiplex controller

Description

The ZLNB1001 multiplex controller is one of a wide range of satellite

receiver LNB and IF distribution support circuits available from Zetex.

It supports a single IF path providing logic outputs to select one of four

IF switch input channels, which typically using PIN diodes. It is

intended for use in multi-switch applications for selection and

distribution of universal LNB IF output signals, replacing many discrete

components including the voltage regulator to save both

manufacturing cost and PCB size whilst improving reliability.

The highly accurate control input of the ZLNB1001 has both voltage and tone control for the four

required states. The voltage threshold is nominally 14.5 V and to meet the demanding

requirements of some broadcasters it has a switching range of 14.0 V to 15 V. The threshold is

temperature compensated to minimize drift. This features a low and stable input current that

enables transient protection to be achieved with the addition of only a single resistor.

The outputs are configured to deliver a positive regulated voltage drive of 7 V when a desired

channel is selected, and 0V when de-selected.

Features

■ Precision voltage and tone detectors

■ Temperature compensated

■ Low cost solution

■ Integrated tone filter

■ Powered from STB: no additional power requirement

■ Direct drive to PIN diodes

■ SO8 SMD package

Applications

■ Switch boxes for satellite IF distribution

■ LNB receivers

VOUT4

VOUT3

VOUT2

VOUT1

VIN

VPOL

FIN

GND

Pin out - top view

1 2 3 4

ZLNB1001 1

Summary of Contents

Page 1 - ZLNB1001

Issue 1 - September 2005 1 www.zetex.com© Zetex Semiconductors plc 2005ZLNB1001DBS tone and polarity multiplex controllerDescriptionThe ZLNB1001 multi

Page 2

ZLNB1001Issue 1 - September 2005 2 www.zetex.com© Zetex Semiconductors plc 2005Absolute maximum ratingsInput voltage 25VOutput current 50mAOperating t

Page 3

ZLNB1001Issue 1 - September 2005 3 www.zetex.com© Zetex Semiconductors plc 2005Typical application circuit using pin diodesApplication informationThe

Page 4

ZLNB1001Issue 1 - September 2005 4 www.zetex.com© Zetex Semiconductors plc 2005These offices are supported by agents and distributors in major countri

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