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參數(shù)資料
| 型號： | ZLNB2012Q16 |
| 廠商： | ZETEX PLC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | M39012 MIL RF CONNECTOR |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 97K |
| 代理商： | ZLNB2012Q16 |
FURTHER INFORMATION
Inputs Vpol1 and Vpol2 are designed to be wired to the
power inputs of an LNB via a high value (1K) resistors.
Input Vpol1 controls outputs HOR1, BHOR1 and ENA1.
Input Vpol2 controls outputs HOR2, BHOR2 and ENA2.
With either input voltage set at or below 14V, the
corresponding HOR pin will be active and the
corresponding BHOR pin will be the inverse of HOR.
With either input voltage at 14.5V or higher, the
corresponding HOR pin will be active and the
corresponding BHOR pin will be the inverse. Should
the voltage applied to either Vpol input fall below 8V,
the corresponding ENA (enable) pin will be low,
otherwise these outputs will remain high. Any input or
output may be left open circuit without any effect on
the remaining circuitry.
The ZLNB2012 includes all the circuitry necessary to
detect the presence of a 22kHz tone modulated on the
supply input to the LNB. The main elements of the
detector are an op-amp, a rectifier/smoother and a
comparitor. The op-amp has a pre-set internal
feedback resistor so that just a simple RC network
wired to the input gives user defined gain and low
frequency cut filter characteristics.
The RC network components also serve two other
purposes. The resistor provides overvoltage
protectionfortheVpolpinandthecapacitorminimises
tone interference of the Vpol threshold. The upper
frequencyroll-offoftheop-amphasbeensetinternally
at above 100kHz to allow the amplifier to be used with
other common tone switch frequencies.
Therectifier/smoother/comparitorfunctionisprovided
by a complex propriety circuit that allows the
ZLNB2012 to reliably detect wanted tones whilst
ignoring low frequency square wave switch box
signals, DiSEqC
bursts and supply switching
transients common when using DiSEqC-2
ready
set-top boxes. This is all achieved without the need for
any further external components. The threshold of the
comparitor is supply dependent, hence the gain of the
precedingop-ampmustbeadjustedinlinewithsupply
voltage.
Output Truth Table
The ZLNB2012 includes two independent channels, each containing a voltage detector and tone detector. The
following truth table applies to each channel:-
PROVISIONAL ISSUE A - OCTOBER 2001
ZLNB2012
7
Tone
Vpol
TD
BTD
HOR
BHOR
ENA
Off
14V
Low
High
Low
High
High
Off
14.5V
Low
High
High
Low
High
On
14V
High
Low
Low
High
High
On
14.5V
High
Low
High
Low
High
-
<8V
-
-
Low
High
Low
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZLNB2012Q16TC | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| ZLNB2013 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:DUAL TONE AND POLARITY SWITCH LNB MULTIPLEX CONTROLLER |
| ZLNB2013Q16 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:DUAL TONE AND POLARITY SWITCH LNB MULTIPLEX CONTROLLER |
| ZLNB2013Q16TC | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 DUAL H/V TONE SWITCH MUX CONTROLLER RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| ZLNB2015 | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:ADVANCED DBS DUAL CHANNEL VOLTAGE AND TONE DETECTOR |
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