ZLNB2002Q16 [ZETEX]

DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER; 双音调和极性切换LNB复用控制器


型号：	ZLNB2002Q16
厂家：	ZETEX SEMICONDUCTORS
描述：	DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER 双音调和极性切换LNB复用控制器模拟IC 信号电路光电二极管控制器
文件：	总12页 (文件大小：170K)
中文：	中文翻译
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ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

DUAL TONE and POLARITY SWITCH LNB

MULTIPLEX CONTROLLER

ISSUE 1- NOVEMBER 1998

DEVICE DESCRIPTION

"receiver not present", switching the

channels Enable pin low. This logic output

can be used to disable the associated

downfeed driver, eliminating any problems

due to cable mismatch.

The ZLNB200X dual polarisation 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

polarisation selection, local oscillator

selection and downfeed disable. It is

intended for use in Twin Universal LNBs,

replacing manydiscretecomponents tosave

both manufacturing cost and PCB size whilst

improving reliability.

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 ZLNB200X 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 ZLNB2003/4, additional

control of tone switch delays is provided to

assist with the rejection of low frequency

control signals intended for other systems.

The two polarisation control inputs of the

ZLNB200X 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.

Polarisation switch and tone detector

outputs can source and sink 10mA making

them suitable to drive TTL and CMOS logic,

pin diodes and for IF-amp supply switching.

Twin Universal LNBs can be called to

operate with one of their controlling

receivers powered down/disconnected, with

attendant cable mismatch problems. To

ease design for this situation, each

polarisation input of the ZLNB200X has a

second threshold set at 9.5V. An input

voltage below this threshold indicates

The ZLNB200X operates from a single

supply which can be anything from5-10V. Its

quiescent current is typically only 6mA and

this does not change significantly with load

or logic state. It is available in the space

saving QSOP16 surface mount package.

FEATURES

Receiver-Off detector TTL and CMOS

•

compatible

Dual polarisation switch

•

Wide supply operating range

•

Temperature compensated polarisation

switch threshold

Low quiescent current

•

Few external components

Transient resistant inputs

•

Eliminates many discrete components

Includes Receiver-Off detector

•

Dual tone switch

•

APPLICATIONS

User adjustable filter centre frequency

and bandwidth

Twin Universal LNB

•

Twin Universal IF switch boxes

User adjustable tone switching delays

(ZLNB2003/4 only)

•

LNB switch boxes

•

Tone and pol. outputs TTL, CMOS, Pin

diode and IF amp capable

•

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

Power Dissipation (T_amb= 25°C)

QSOP16 500mW

ABSOLUTE MAXIMUM RATINGS

Supply Voltage

Supply Current

-0.6V to 12V

100mA

_POL1and V_POL2

Input Voltage

25V Continuous

-40 to 70°C

-40 to 85°

Operating Temperature

Storage Temperature

ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):

= 25°C,V =5V,I =10mA (R =33kΩ)

amb CC

CAL1

CONDITIONS

LIMITS

Typ

SYMBOL PARAMETER

UNITS

Min

Max

V_CC

I_CC

Supply Voltage

Supply Current IHV_out1,2=IT_out1,2=0

IT_out1,2=0,IHV_out1,2=10mA,

V_POL=15.5V

V_POL1and V_POL2Inputs

5.5

I_POL

Current

V_POL1= V_POL2= 25V (Note 2)

T_amb=-40°C to 70°C (Note 2)

µA

V_TPOL

Threshold

Voltage

14.0

14.75

15.5

T_SPOL

Switching

Speed

100

µs

IHV_out1and IHV_out2Outputs

VHV_HIGHVoltage High

VHV_LOWVoltage Low

_CC-0.2 V_CC-0.1 V_CC

IHV_out1,2=-20µA,V_POL1,2= 15.5V

IHVout1,2=-10µA,V_POL1,2= 15.5V

IHV_out1,2=-10µA,V_POL1,2= 14V

V_CC-1.0 V_CC-0.9 V_CC

0.29

0.5

Enable 1,2

Outputs

VEN_HIGHVoltage High

VEN_LOWVoltage Low

Filter Amplifier

_CC-1.0 V_CC-0.75 V_CC

IEnable1,2=-100µA,V_POL1,2= 10V

IEnable1,2=20µA,V_POL1,2= 8.0V

IEnable1,2=500µA,V_POL1,2=8.0V

0.14

0.25

V_CC

0.5

I_B

Input Bias

Current

RF1=150k

0.02

0.07

0.25

µA

V_out

I_out

G_V

V_out(Note 1)

I_out(Note 1)

Voltage Gain

RF1=150k

1.75

400

1.95

520

2.15

650

Vout=1.96V, Vfin=2.1V

F=22kHz, Vin=1mV

µA

Rectifier (ZLNB2003 and ZLNB2004 ONLY)

V_REC

Vout (Note 1)

ILeakage

1.8

2.0

2.2

RF1=150k, IL=10µA

RF1=150k, Vout=3V (Note 1)

200

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):

= 25°C,V =5V,I =10mA (R

=33kΩ)

CAL1

amb

LIMITS

Typ

SYMBOL PARAMETER

UNITS

Min

2.95

Max

3.45

Comparator (ZLNB2003 and ZLNB2004 ONLY)

V_TH

Threshold

(Note 1)

F=0

3.2

Tout 1/2

V_VHIGHOutputs

Voltage High

V_VHIGH

ITout1,2=-20µA, Test Circuit 1,

Tone enabled

ITout1,2=-10mA, Test Circuit 1,

Tone enabled

ITout1,2=10mA, Test Circuit 1,

Tone disabled

V_CC-0.2 V_CC-0.1 V_CC

V_CC-1.0 V_CC-0.9

Voltage High

Voltage Low

0.29

V_CC

V_VLOW

0.5

Note:-

1) The parameters Filter Amplifier Vout, Iout, Rectifier Vout and Comparator Threshold Voltage

are all directly (linearly) related to Vcc.

2) Applied via 10k resistors

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

TEST CIRCUIT 1

ZLNB2001

ZLNB2002

68pF

150k

470pF

OUT2

OUT1

IN1

IN2

POL1

POL2

470pF

10k

(see

Note 1)

TEST CIRCUIT 2

ZLNB2003

ZLNB2004

68pF

REC2

150k

REC1

470pF

OUT2

OUT1

IN1

IN2

POL1

POL2

470pF

10k

100nF

10k

(see

Note 1)

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

TYPICAL CHARACTERISTICS

0.4

Vcc = 5V

0.3

0.2

0.1

Tamb = 70°C

Tamb = 25°C

Tamb = -40°C

100

10k

100k

10M

Frequency (Hz)

Load Current (mA)

Open Loop Gain v Frequency

HV/Tout Voltage Low v Load Current

5.0

Vcc = 5V

180

150

120

4.8

4.6

Tamb = 70°C

Tamb = 25°C

Tamb = -40°C

4.4

4.2

4.0

100

10k

100k

Frequency (Hz)

Load Current (mA)

Open Loop Phase v Frequency

HV/Tout Voltage High v Load Current

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Vcc = 5V

Vin=0.1Vp/p

Test Circ. 1

100

10k

100k

Frequency (Hz)

Filter Response

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

The following block diagram shows a typical

block diagram twin universal LNB design.

The ZLNB200X devices provides the two

polarity and two tone switches required to

decode the two independent receiver feeds.

The devices are also able detect the absence

of a receiver connected to either port of the

LNB providing an Enable signal allowing the

disabling of the port. This allows the

avoidance of unwanted signal reflections

from an unterminated down feed cable.

Additionally the front end bias requirements

of the LNB are provided by the ZNBG4000 or

ZNBG6000 offering a very efficient and cost

effective solution.

Control Input

<=13V-Horizontal

>=14.5V-Vertical

DC Input

13-25V

Horizontal Gain Stage

High Band

GaAs/HEMTFET

Antenna

High Band

Horizontal

Mixer

Low Band

Horizontal

H/V Output 1

Low Band

Diode

MUX

IF down feed

ASTRA

10.95 GHz-11.7 GHz

Standard Band

10.7 GHz-11.8 GHz

Enhanced Band

ZLNB20XX Series

Dual H/V Switch

950-1750 MHz

- Standard Band

950-2050 MHz

- Enhanced Band

Bias Generator

ZNBG40XX

Series

Control

22kHz Switch

High Band

Vertical

H/V Output 2

Mixer

Low Band

Vertical

Antenna

Gain Stage

GaAs/HEMTFET

Low Band

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

APPLICATION CIRCUIT EXAMPLES

The following circuit shows the additional components that will be used for polarisation mode

and 22kHz tone detection in a typical ZLNB2001/2 application.

ZLNB2001

68pF

150k

470pF

OUT2

OUT1

IN1

IN2

POL1

POL2

470pF

10k

LNB Downfeed

No.1

LNB Downfeed

No.2

The following circuit shows the additional components that will be used for polarisation mode

and 22kHz tone detection in a typical ZLNB2003/4 application.

ZLNB2003

68pF

REC2

150k

REC1

470pF

OUT2

OUT1

IN1

IN2

POL1

POL2

470pF

10k

100nF

10k

LNB Downfeed

No.1

LNB Downfeed

No.2

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

FURTHER INFORMATION

high. Pins Crec1 and Crec2 make

accessible the outputs of the tone switch

rectifiers and provides a means of

controlling tone switch delays.

Significant switching delays may be

necessary to avoid incorrect operation in

the presence of unwanted interference

(e.g. switching tones intended for other

signalling systems). For correct

operation of the IC, a capacitor and a

parallel connected resistor should be

connected between each Crec pin and

ground. The Tout low to high delays are

set solely by the added capacitors at

approximately 22ms/uF. The high to low

delays are set by the time constant of

each resistor capacitor combination at

approximately 0.2CR seconds. A

capacitor of 100nF and resistor of 1MW

will give a low to high delay of around

2.2ms and a high to low delay of 20ms,

providing immunity to the 60Hz square

wave signal occasionally used for

switching between multiple LNB units.

1) Inputs V_POL1and V_POL2are designed to be

wired to the power inputs of an LNB via

high value (10k) resistors. Input V_POL1

controls outputs HVout1 and Enable1.

Input V_POL2controls outputs HVout2 and

Enable2. With either input voltage set at

or below 14V, the corresponding HVout

pin will be in active. With either input

voltage at or above 15.5V, the

corresponding HVout pin will be active.

Should the voltage applied to either V_POL

input fall below 8V, the corresponding

Enable pin will be low, otherwise these

outputs will be high.Any input or output

not required may be left open-circuit.

2) The ZLNB2001/2 includes the circuitry

necessary to detect the presence of 22kHz

tones modulated on either of two supply

inputs to the lnb. The main elements of

the detectors in each channel are an

op-amp enabling the construction of a

Sallen Key filter, a rectifier/smoother and

a comparator. Full user control is given

over the centre frequency and bandwidth

of the filter using two external resistors

and capacitors (one of these resistors

shares the function of overvoltage

protection of the corresponding V_POLpin,

i.e. the 10k referenced in note 1). The

comparator circuit utilises no external

components. The presence of a 22kHz

tone applied to pin Fin1 or Fin2 switches

the corresponding output Tout1 or Tout2

high.

3) The ZLNB2003 / 4 includes the circuitry

necessary to detect the presence of 22kHz

tones modulated on either of two supply

inputs to the LNB. The main elements of

the detectors in each channel are an

op-amp enabling the construction of a

Sallen Key filter, a rectifier/smoother and

a comparator. Full user control is given

over the centre frequency and bandwidth

of the filter using two external resistors

and capacitors (one of these resistors

shares the function of overvoltage

protection of the corresponding Vpol pin,

i.e. the 10k referenced in note 1). The

comparator circuit utilises no external

components. The presence of a 22kHz

tone applied to pin Fin1 or Fin2 switches

the corresponding output Tout1 or Tout2

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

TONE DETECTION FUNCTION

Fin1

Fin2

Tout 1

High

Low

High

Low

HV_OUT1

Low

High

Low

Tout 2

ZLNB2001/3

ZLNB2002/4

22kHz

High

Low

High

Low

HV_OUT2

Low

High

Low

22kHz

V_POL1

<=14V

>=15.5V

<=14V

>=15.5V

<=8V

V_POL2

<=14V

>=15.5V

<=14V

>=15.5V

<=8V

Enable 1 /2

High

ZLNB2001/3

ZLNB2002/4

ZLNB2001,2,3,4

High

Low

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

CONNECTION DIAGRAMS

QSOP16

Package Suffix - Q16

QSOP16

Package Suffix - Q16

Top View

Applies to

ZLNB2001

Applies to

ZLNB2002

QSOP16

Package Suffix - Q16

QSOP16

Package Suffix - Q16

Top View

Applies to

ZLNB2004

Applies to

ZLNB2003

ORDERING INFORMATION

Part Number

ZLNB2001Q16

ZLNB2002Q16

ZLNB2003Q16

ZLNB2004Q16

Package

QSOP16

Part Mark

ZLNB2001

ZLNB2002

ZLNB2003

ZLNB2004

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

PACKAGE DIMENSIONS

IDENTIFICATION

RECESS

FOR PIN 1

PIN No.1

QSOP16

DIM

Millimetres

Inches

MIN

4.80

0.635

0.177

0.20

3.81

1.35

0.10

5.79

0°

MAX

0.196

4.98

0.189

0.025 NOM

0.007

0.008

0.15

0.267

0.30

3.99

1.75

0.25

6.20

8°

0.011

0.012

0.157

0.069

0.01

0.053

0.004

0.228

0°

0.244

8°

ZLNB2001 ZLNB2002

ZLNB2003 ZLNB2004

MSOP8

DIM

Millimetres

Inches

MIN

0.91

0.10

0.25

0.13

2.95

0.65

0.33

2.95

4.78

0.41

0°

MAX

0.044

0.008

0.014

0.007

0.120

1.11

0.20

0.36

0.18

3.05

NOM

3.05

5.03

0.66

6°

0.036

0.004

0.010

0.005

0.116

0.0256 NOM

0.0128 NOM

0.116

0.188

0.016

0°

0.120

0.198

0.026

6°

θ°

SO8

DIM

Millimetres

Inches

Min

Max

4.80

4.98

0.189

0.05 BSC

0.02 REF

0.014

0.15

0.196

1.27 BSC

0.53 REF

0.36

0.46

3.99

1.75

0.25

6.20

8°

0.018

0.157

0.07

0.010

0.24

8°

3.81

1.35

0.05

0.10

0.004

0.23

5.80

0°

0.41

1.27

0.016

0.050

ZLNB2002Q16 [ZETEX]

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