ZNBG3113Q20TC Diodes Zetex, ZNBG3113Q20TC Datasheet

ZNBG3113Q20TC

Manufacturer Part Number

ZNBG3113Q20TC

Description

IC SW 3BIAS TONE H/V 2.2V 20QSOP

Manufacturer

Diodes Zetex

Datasheet

1.ZNBG3113Q20TC.pdf (17 pages)

Specifications of ZNBG3113Q20TC

Function

Bias Controller

Rf Type

LNBs, PMR

Secondary Attributes

with Polarization Switch and Tone Detection

Package / Case

20-QSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ZNBG3113Q20TC

Manufacturer:

ZETEX

Quantity:

20 000

Current page: 1 of 17
Download datasheet (693Kb)

FET BIAS CONTROLLER WITH POLARISATION

SWITCH AND TONE DETECTION

ISSUE 1 - OCTOBER 1998

DEVICE DESCRIPTION

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

resistor the devices provide drain voltage and

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.

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

p e r m a n e n t l y a ct i v e . T hi s f e a t u r e i s

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.

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.

FEATURES

Provides bias for GaAs and HEMT FETs

Drives up to three FETs

Dynamic FET protection

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

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.

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.

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 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.

APPLICATIONS

Satellite receiver LNBs

Private mobile radio (PMR)

Cellular telephones

ZNBG3113

ZNBG3114

Related parts for ZNBG3113Q20TC

ZNBG3113Q20TC Summary of contents

Page 1

FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION ISSUE 1 - OCTOBER 1998 DEVICE DESCRIPTION The ZNBG series of devices are designed to meet the bias requirements of GaAs and HEMT FETs commonly used in satellite receiver LNBs, PMR ...

Page 2

ZNBG3113 ZNBG3114 ABSOLUTE MAXIMUM RATINGS Supply Voltage -0.6V to 12V Supply Current 100mA Input Voltage (V ) 25V Continuous POL Drain Current (per FET 15mA (set CAL Operating Temperature -40 to 70°C Storage Temperature -50 ...

Page 3

SYMBOLPARAMETER CONDITIONS GATE CHARACTERISTICS I Output Current GO Range I Dx (mA) Output Voltage V Gate 1 Off G1O V Low I = G1L V High G1H Output Voltage V ...

Page 4

ZNBG3113 ZNBG3114 SYMBOLPARAMETER CONDITIONS TONE DETECTION CHARACTERISTICS Filter Amplifier I Input Bias Current R =150k Output Voltage R =150k OUT Output Current V =1.96V, V OUT OUT G Voltage Gain f=22kHz,V V Rectifier ...

Page 5

TEST CIRCUIT 1 TEST CIRCUIT 2 ZNBG3113 ZNBG3114 V2 Characteristics Type AC source Frequency 22kHz Voltage 350mV p/p enabled 100mV p/p disabled V2 Characteristics Type AC source Frequency 22kHz Voltage 350mV p/p enabled 100mV p/p disabled 4-127 ...

Page 6

ZNBG3113 ZNBG3114 TYPICAL CHARACTERISTICS 16 Vcc = (k) cal JFET Drain Current v R cal 2.4 2.3 2.2 Vcc = 10V 2.1 ...

Page 7

TYPICAL CHARACTERISTICS 70 Vcc = 100 1k 10k 100k 1M Frequency (Hz) Open Loop Gain v Frequency 180 150 120 100 1k 10k 100k ...

Page 8

ZNBG3113 ZNBG3114 FUNCTIONAL DIAGRAM FUNCTIONAL DESCRIPTION The ZNBG devices provide all the bias requirements for external FETs, including the generation of the negative supply required for gate biasing, from the single supply voltage.The diagram above shows a single stage from ...

Page 9

The following schematic shows the function of the V numberd Q1 and Q2 are powered at any one time, their selection is controlled by the input V This input is designed to be wired to the power input of the ...

Page 10

ZNBG3113 ZNBG3114 For many LNB applications tone detection and band switching is required. The ZNBG3113/14 includes the circuitry necessary to detect the presence of a 22kHz tone modulated on the supply input to the LNB. Referring to the following schematic ...

Page 11

APPLICATIONS CIRCUIT APPLICATIONS INFORMATION The above is a partial application circuit for the ZNBG series showing all external components required for appropriate biasing. The bias circuits are unconditionally stable over the full temperature range with the associated FETs and gate ...

Page 12

ZNBG3113 ZNBG3114 APPLICATIONS INFORMATION(cont) The following block diagram shows the main section of an LNB designed for use with the Astra series of satellites. The ZNBG3113/14 is the core bias and control element of this circuit. The ZNBG provides the ...

Page 13

Figure 1 L grounded OV Figure 2 L connected OSC ZNBG3113 ZNBG3114 4-135 ...

Page 14

ZNBG3113 ZNBG3114 CONNECTION DIAGRAM ORDERING INFORMATION Part Number Package ZNBG3113Q20 QSOP20 ZNBG3114Q20 QSOP20 Part Mark ZNBG3113 ZNBG3114 4-136 ...

Page 15

ZNBG3113 ZNBG3114 PACKAGE DIMENSIONS IDENTIFICATION RECESS FOR PIN 1 PIN No.1 PIN Millimetres Inches MIN MAX MIN MAX A 8.55 8.74 0.337 0.344 B 0.635 0.025 NOM C 1.42 1.52 0.056 0.06 D 0.20 0.30 0.008 0.012 E 3.81 3.99 ...

Page 16

Zetex plc. Fields New Road, Chadderton, Oldham, OL9-8NP, United Kingdom. Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries) Fax: (44)161 622 4420 Zetex GmbH Zetex Inc. Streitfeldstraß Mall Drive, Unit 4 D-81673 München Commack NY 11725 ...

Page 17

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