Datasheet > ZNBG3113

ZNBG3113

更新时间： 2024-11-24 22:06:51

品牌	Logo	应用领域
捷特科 - ZETEX		开关控制器
页数	文件大小	规格书
17页	687K
描述
FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION

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ZNBG3113 数据手册

FET BIAS CONTROLLER WITH POLARISATION

SWITCH AND TONE DETECTION

ISSUE 1 - OCTOBER 1998

ZNBG3113

ZNBG3114

DEVICE DESCRIPTION

Drain current setting of the ZNBG3113/14 is

user selectable over the range 0 to 15mA, this

is achieved with addition of a single resistor.

The series also offers the choice of drain

voltage to be set for the FETs, the 3113 gives

2.2 volts drain whilst the 3114 gives 2 volts.

The ZNBG series of devices are designed to

meet the bias requirements of GaAs and

HEMT FETs commonly used in satellite

receiver LNBs, PMR cellular telephones etc.

with a minimum of external components.

With the addition of two capacitors and a

resistorthedevicesprovide drainvoltageand

current control for three external grounded

source FETs, generating the regulated

negative rail required for FET gate biasing

whilst operating from a single supply. This

negative bias, at -3 volts, can also be used to

supply other external circuits.

These devices are unconditionally stable

over the full working temperature with the

FETs in place, subject to the inclusion of the

recommended gate and drain capacitors.

These ensure RF stability and minimal

injected noise.

It is possible to use less than the devices full

complement of FET bias controls, unused

drain and gate connections can be left open

circuit without affecting operation of the

remaining bias circuits.

The ZNBG3113/14 includes bias circuits to

drive up to three external FETs. A control

input to the device selects either one of two

FETs as operational, the third FET is

permanently active. This feature is

particularly used as an LNB polarisation

switch. Also specific to LNB applications is

the 22kHz tone detection and logic output

feature which is used to enable high and low

band frequency switching.

To protect the external FETs the circuits have

been designed to ensure that, under any

conditions including power up/down

transients, the gate drive from the bias

circuits cannot exceed the range -3.5V to 1V.

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.

The facility to control the tone switching

delay is provided. This allows the rejection

of other lower frequency tones tat may be

present in multiple LNB applications.

The ZNBG3113/14 are available in QSOP20

for the minimum in device size. Device

operating temperature is -40 to 70°C to suit

a wide range of environmental conditions.

FEATURES

APPLICATIONS

Provides bias for GaAs and HEMT FETs

Satellite receiver LNBs

•

Drives up to three FETs

Private mobile radio (PMR)

•

Dynamic FET protection

Cellular telephones

•

Drain current set by external resistor

•

Regulated negative rail generator

requires only 2 external capacitors

•

Choice in drain voltage

•

Wide supply voltage range

•

Polarisation switch for LNBs

•

22KHz tone detection for band

switching

Programmable tone delay

•

Compliant with ASTRA control

specifications

QSOP surface mount package

•

4-123

12 3 4 5 6 7...17

中文翻译

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与ZNBG3113相关器件

型号	品牌	获取价格	描述	数据表
ZNBG3113Q20	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3113Q20TC	ZETEX	获取价格	Analog Circuit, 1 Func, PDSO20, QSOP-20
ZNBG3114	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3114	DIODES	获取价格	FET BIAS CONTROLLER WITH POLARISATION
ZNBG3114Q20	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115	DIODES	获取价格	FET BIAS CONTROLLER WITH POLARISATION
ZNBG3115_06	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115Q16	ZETEX	获取价格	FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115Q16TA	ZETEX	获取价格	Analog Circuit, 1 Func, PDSO16, MO-137AB, QSOP-16

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