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ZLNB2002のメーカーはZetex Semiconductorsです、この部品の機能は「DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER」です。 |
部品番号 | ZLNB2002 |
| |
部品説明 | DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER | ||
メーカ | Zetex Semiconductors | ||
ロゴ | |||
このページの下部にプレビューとZLNB2002ダウンロード(pdfファイル)リンクがあります。 Total 12 pages
DUAL TONE and POLARITY SWITCH LNB
MULTIPLEX CONTROLLER
ISSUE 1- NOVEMBER 1998
ZLNB2001 ZLNB2002
ZLNB2003 ZLNB2004
DEVICE DESCRIPTION
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 many discrete components to save
both manufacturing cost and PCB size whilst
improving reliability.
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.
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
"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.
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.
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.
The ZLNB200X operates from a single
supply which can be anything from 5-10V. 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
• Dual polarisation switch
• Temperature compensated polarisation
switch threshold
• Transient resistant inputs
• Includes Receiver-Off detector
• Dual tone switch
• User adjustable filter centre frequency
and bandwidth
• User adjustable tone switching delays
(ZLNB2003/4 only)
• Tone and pol. outputs TTL, CMOS, Pin
diode and IF amp capable
• Receiver-Off detector TTL and CMOS
compatible
• Wide supply operating range
• Low quiescent current
• Few external components
• Eliminates many discrete components
APPLICATIONS
• Twin Universal LNB
• Twin Universal IF switch boxes
• LNB switch boxes
81
1 Page ZLNB2001 ZLNB2002
ZLNB2003 ZLNB2004
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):
Tamb= 25°C,VCC=5V,ID=10mA (RCAL1=33kΩ)
SYMBOL PARAMETER
LIMITS
UNITS
VTH
VVHIGH
VVHIGH
VVLOW
Comparator (ZLNB2003 and ZLNB2004 ONLY)
Threshold
(Note 1)
F=0
Tout 1/2
Outputs
Voltage High
Voltage High
Voltage Low
ITout1,2=-20µA, Test Circuit 1,
Tone enabled
ITout1,2=-10mA, Test Circuit 1,
Tone enabled
ITout1,2=10mA, Test Circuit 1,
Tone disabled
Min Typ Max
2.95 3.2
3.45
VCC-0.2 VCC-0.1 VCC
VCC-1.0 VCC-0.9
0 0.29 VCC
0.5
V
V
V
V
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
83
3Pages 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.
Horizontal Gain Stage
Antenna GaAs/HEMTFET
13
ASTRA
10.95 GHz-11.7 GHz
Standard Band
10.7 GHz-11.8 GHz
Enhanced Band
Bias Generator
ZNBG40XX
Series
Control Input
<=13V-Horizontal
High Band >=14.5V-Vertical
+
Mixer
+
Low Band
High Band
Horizontal
Low Band
Horizontal
ZLNB20XX Series
Dual H/V Switch
&
22kHz Switch
Control
PIN
Diode
MUX
DC Input
13-25V
H/V Output 1
IF down feed
950-1750 MHz
- Standard Band
950-2050 MHz
- Enhanced Band
24
Vertical Gain Stage
Antenna GaAs/HEMTFET
High Band
+
Mixer
+
Low Band
High Band
Vertical
Low Band
Vertical
H/V Output 2
86
6 Page | |||
ページ | 合計 : 12 ページ | ||
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PDF ダウンロード | [ ZLNB2002 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
ZLNB2001 | DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER | Zetex Semiconductors |
ZLNB2002 | DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER | Zetex Semiconductors |
ZLNB2003 | DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER | Zetex Semiconductors |
ZLNB2004 | DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER | Zetex Semiconductors |