ZLNB2012Q16TC Diodes Zetex, ZLNB2012Q16TC Datasheet

ZLNB2012Q16TC

Manufacturer Part Number

ZLNB2012Q16TC

Description

MUX DUAL DUAL H/V TONE SW 16QSOP

Manufacturer

Diodes Zetex

Datasheet

1.ZLNB2012Q16TC.pdf (8 pages)

Specifications of ZLNB2012Q16TC

Function

Multiplex Controller

Rf Type

LNB, DiSEqC™ , STBs

Secondary Attributes

with Dual Tone and Polarity Switch

Package / Case

16-QSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Download datasheet (174Kb)

DUAL TONE AND POLARITY SWITCH LNB MULTIPLEX CONTROLLER

DESCRIPTION

The ZLNB2013 dual polarization and tone switch

controller is one of a wide range of satellite receiver

LNB support circuits available from Zetex. It features

two completely independent channels, each providing

logic outputs to control LNB polarization selection,

local oscillator selection and down feed disable. It is

intended for use in Twin, Quad and multiple feed

Universal LNBs, replacing many discrete components

to save both manufacturing cost and PCB size, whilst

improving reliability.

The two polarization control inputs of the ZLNB2013

have a threshold voltage of 14.75V to meet the

switching requirement of 14.0V to 15.5V. To minimize

drift both thresholds are temperature compensated.

Each features a low and stable input current that

enables threshold trimming and transient protection to

be achieved with the addition of only a single resistor

per channel.

Multi feed LNBs can be called to operate with one or

more of their controlling receivers powered

down/disconnected, with attendant cable mismatch

problems. To ease design for this situation, each

polarization input of the ZLNB2013 has a second

threshold set at 9V. An input voltage below this

threshold indicates “receiver not present” and

switches the relevant control channels high. This logic

output can be used to disable the associated down feed

driver, eliminating any problems due to cable

mismatch.

FEATURES

• Dual polarization and tone switch

• Temperature compensated polarization switches

• Reduced cost solution, only 2 external components

• Multiplexer IC direct drive

• Tone and pol. outputs are TTL, CMOS, pin diode and

• Transient resistant inputs

• Includes receiver-off detector

• User adjustable filter centre frequency and

ISSUE 1 - AUGUST 2005

per channel

IF amp capable

bandwidth

Universal LNB local oscillator selection is achieved by

detection of a low level AC voltage superimposed on

the polarization control voltage. To facilitate this

function, the ZLNB2013 includes a separate tone

detector for each channel. Control of detector

bandwidth and sensitivity is provided using an external

resistor and capacitor for each channel. The tone

detector has been designed to give excellent rejection

of low frequency control signals and DiSEqC™ tone

bursts.

The ZLNB2013 has been specifically designed to

minimize the solution cost whilst being flexible. The

ZLNB2013 only requires two external components per

channel to give full user control and functionality. The

ZLNB2013 also includes complimentary outputs so

that it can directly drive many multiplexer ICs without

the need of an inverter. Any unused outputs can be left

open circuit without any effect to the remaining

circuits. Polarization switch and tone detector outputs

can directly drive TTL and CMOS logic, pin diodes,

IF-amp supply switching and multiplexer ICs.

The ZLNB2013 operates from a single supply which can

be anything from 5-8V. Its quiescent current is typically

only 9mA and this does not change significantly with

load or logic state. It is available in the space saving

QSOP16 surface mount package.

• Low frequency and DiSEqC™ control signals

• Eliminates many close tolerance discrete

• Wide supply operating range

• Low quiescent current

APPLICATIONS

• Twin Universal LNB’s

• Quad Universal LNB’s

• Multi Feed Universal LNB’s

• LNB switch boxes

rejection

components

ZLNB2013

Related parts for ZLNB2012Q16TC

ZLNB2012Q16TC Summary of contents

Page 1

DUAL TONE AND POLARITY SWITCH LNB MULTIPLEX CONTROLLER DESCRIPTION The ZLNB2013 dual polarization and tone switch controller is one of a wide range of satellite receiver LNB support circuits available from Zetex. It features two completely independent channels, each providing ...

Page 2

ZLNB2013 ABSOLUTE MAXIMUM RATINGS Supply voltage Supply current V and V POL1 POL2 Input voltage Operating temperature Storage temperature ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated =5V amb CC SYMBOL PARAMETER CONDITIONS V Supply voltage ...

Page 3

ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated C,V T =5V amb CC SYMBOL PARAMETER TD 1,2 Outputs V Voltage high VHIGH V Voltage Low VLOW BTD 1,2 Outputs V Voltage high VHIGH V Voltage Low VLOW Note: 1) ...

Page 4

ZLNB2013 TEST CIRCUIT 1 (ZLNB2013 Pinout for QSOP16 package designator - Q16) ISSUE 1 - AUGUST 2005 4 ...

Page 5

The following diagram shows a typical block diagram for a twin universal LNB design. The ZLNB2013 device provides the two polarity and two tone required to decode the two independent receiver feeds. The device is also able to detect the ...

Page 6

ZLNB2013 APPLICATION CIRCUIT EXAMPLES The following circuit shows the additional components that will be used for polarisation mode and 22kHz tone detection in typical ZLNB2013 application (ZLNB2013 Pinout for QSOP16 package designator - Q16). ZLNB2013 PINOUT FOR QSOP16 PACKAGE DESIGNATOR ...

Page 7

FURTHER INFORMATION Inputs Vpol1 and Vpol2 are designed to be wired to the power inputs of an LNB via a high value (2.2k) resistors. Input Vpol1 controls outputs HOR1, BHOR1 and ENA1. Input Vpol2 controls outputs HOR2, BHOR2 and ENA2. ...

Page 8

ZLNB2013 QSOP16 D ZD 0.120” max. Pin 1 0.080” max. b PACKAGE DIMENSIONS Dim. Millimeters Min. Max. Min. A 1.35 1.75 0.053 A1 0.10 0.25 0.004 A2 1.25 1.50 0.049 D 4.80 5.00 0.189 ZD 0.23 REF. E 5.79 6.20 ...

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