ZLNB2006Q20TC【PDF 1/11 页】MUX DUAL DUAL H/V TONE SW 20QSOP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录537

[1页]2页 3页 4页 5页

ZLNB2006

DUAL TONE AND POLARITY SWITCH

LNB MULTIPLEX CONTROLLER

DEVICE DESCRIPTION

ZLNB2009

ZLNB2010

The ZLNB2006/09/10 group of dual polarisation and

tone switch controller are part of a wide range of

satellite receiver LNB support circuits available from

Zetex. Each part features two completely independent

channels, each providing logic outputs to control LNB

polarisation selection, local oscillator selection and the

ZLNB2009/10 also provides downfeed disable. They

are intended for use in Twin Universal and Quad LNBs,

replacing many discrete components to save both

manufacturing cost and PCB size whilst improving

Universal LNB local oscillator selection is achieved by

detection of a low level AC voltage superimposed on

the polarisation control voltage. To facilitate this

function, the ZLNB2006/09/10 includes a separate tone

detector for each channel. Full control of detector

bandwidth and sensitivity is provided using two

external resistors and capacitors. In the ZLNB2006/9,

additional control of tone switch delays is provided to

assist with the rejection of low frequency control

signals intended for other systems.

reliability.

Polarisation switch and tone detector outputs can

T h e tw o pol a ri s at i on c ont r ol i nput s o f t h e

ZLNB2006/09/10 have a nominal threshold of 14.75V.

The threshold is temperature compensated to

minimise drift. Each features a low and stable input

current that enables 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

polarisation input of the ZLNB2009/10 has a second

threshold set at 9.5V. An input voltage below this

threshold indicates “receiver not present”, switching

the relevant control channels high. This logic output

can be used to disable the associated downfeed driver,

eliminating any problems due to cable mismatch.

FEATURES

? Dual polarisation switch

? Temperature compensated polarisation switch

threshold

? Transient resistant inputs

? Includes Receiver-Off detector (ZLNB2009/10)

? Dual tone switch

? User adjustable filter centre frequency and

bandwidth

? User adjustable tone switching delays

? Tone and Pol outputs are TTL, CMOS, Pin diode

and IF amp capable

ISSUE 1 - APRIL 2002

source and sink 10mA making them suitable to drive

TTL and CMOS logic, pin diodes and IF-amp supply

switching.

The ZLNB2006/09/10 operates from a single supply

which can be anything from 5-10V. Their quiescent

current is typically only 6mA and this does not change

significantly with load or logic state. They are available

in the space saving QSOP16 or QSOP20 surface mount

package.

? Wide supply operating range

? Low quiescent current

? Few external components

? Eliminates many discrete components

APPLICATIONS

? Twin Universal LNB

? Multi Feed Universal Lnb’s

? Twin Universal IF switch boxes

? LNB switch boxes

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式