ZLNB2016 Datasheet PDF - Diodes Incorporated
| Part Number | ZLNB2016 | |
| Description | STANDARD DBS DUAL CHANNEL VOLTAGE AND TONE DETECTOR | |
| Manufacturers | Diodes Incorporated | |
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There is a preview and ZLNB2016 download ( pdf file ) link at the bottom of this page. Total 7 Pages | ||
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A Product Line of
Diodes Incorporated
www.DataSheet4U.com
ZLNB2016
STANDARD DBS DUAL CHANNEL VOLTAGE AND TONE DETECTOR
Summary
The ZLNB2016 is a dual channel polarisation (voltage) and band select (tone) detector IC, primarily for satellite applications such
as Low Noise Blocks (LNBs) and satellite distribution systems. An optimised design provides a low supply current and a wide
operating voltage whilst increasing performance and reliability. The ZLNB2016 offers excellent interference rejection with
minimal application cost and packaged in the 3x3mm QFN it provides a very small solution.
Features
• Two polarisation voltage detectors
• Two robust, interference tolerant 22kHz tone detection
(without external signal filtering)
• “No Receiver” detect function for power saving and
isolation control
• Low quiescent supply current, 2mA typical
• Wide operating supply voltage 3V to 8V
• Low external component count minimises application
cost
• True and inverted outputs to support popular multiplexer
ICs
Pin Assignments
TD1
BTD1
BTD2
TD2
FIN1
VPOL1
VPOL2
FIN2
Top View
Application
• Twin Universal LNBs
• Quad Universal LNBs
• Multi Output LNBs
• Satellite Multi-Switches
GND
Bottom View
Twin Universal LNB System Diagram
RF Gain Stages
GaAs FET’s
Down
IF Gain
Conversion
IF Switching IF Gain,
LNB Control &
Power Mgt.
ZABG
Series
4x2
MUX
ZLNB
2016
Vout
ZLPM
Series
Set-top box
Receiver 1
Set-top box
Receiver 2
ZLNB2016
Document number: DS32073 Rev. 1 - 2
1 of 7
www.diodes.com
February 2010
© Diodes Incorporated
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Applications Information
TD1
BTD1
BTD2
TD2
ZLNB2016
FIN1
VPOL1
VPOL2
FIN2
180pF
C1
C2
180pF
A Product Line of
Diodes Incorporated
www.DataSheet4U.com
ZLNB2016
R1
R2 20k
20k
Downfeed 1
Downfeed 2
Above is a partial applications circuit for the ZLNB2016 showing all external components needed for a typical twin LNB design.
The inputs Vpol1 and Vpol2 are designed to be wired to the power inputs of the LNB via ESD protection resistors (20k). These
inputs control the HOR1/2, BHOR1/2 and ENA1/2 logic outputs. The HOR outputs will be low when their corresponding Vpol input
is at or below 14V and high when Vpol is at or above 15.5V. The BHOR outputs give inverted versions of their related HOR
outputs. The HOR/BHOR outputs are intended to activate polarisation selection circuitry within an LNB, under control of the LNB
supply voltage. The ENA1/2 outputs are set high when their corresponding Vpol input is at or above 8.5V and low when Vpol is at
or below 7.5V. These logic outputs can be used to disable any LNB RF output connected to a receiver (STB) that has been
powered down or disconnected (and hence not providing correct cable matching).
The ZLNB2016 includes circuitry necessary to detect the presence of a 22kHz tone modulated on either of two supply inputs to
the LNB. These detectors control the TD1/2 and BTD1/2 outputs. The TD outputs are set high on detection of a valid tone on their
corresponding LNB input and low in the absence of a tone. The BTD outputs give an inverted version of their corresponding TD
outputs. The main elements of each tone detector are an amplifier, a band-pass filter, a rectifier/smoother and a comparator. User
control is given over the gain of the amplifier and the lower frequency limit of the filter, using an external resistor and capacitor.
(The ESD protection resistor noted above can be used to set amplifier gain, hence requiring only one component for both
functions.) The higher frequency limit of the filter is set internally to block signals above 100kHz. The comparator circuit utilises no
external components.
The HOR, BHOR, TD, BTD and ENA outputs are designed to be compatible with LSTTL, CMOS and common MIMIC multiplexer
loads. Any input or output that is not required can be left open circuit.
Output Truth Table
The ZLNB2016 includes two independent channels, each containing a voltage detector and tone detector. The following truth table
applies to each channel.
Tone
Off
Off
On
On
-
Vpol
14V
14.5V
14V
14.5V
<7.5V
TD
Low
Low
High
High
-
BTD
High
High
Low
Low
-
HOR
Low
High
Low
High
Low
BHOR
High
Low
High
Low
High
ENA
High
High
High
High
Low
ZLNB2016
Document number: DS32073 Rev. 1 - 2
5 of 7
www.diodes.com
February 2010
© Diodes Incorporated
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ZLNB2016 electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ZLNB2016.PDF Datasheet ] | |
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