- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375359 > ARA2000 (ANADIGICS, Inc.) Address-Programmable Reverse Amplifier with Step Attenuator PDF資料下載
參數(shù)資料
| 型號： | ARA2000 |
| 廠商： | ANADIGICS, Inc. |
| 英文描述： | Address-Programmable Reverse Amplifier with Step Attenuator |
| 中文描述： | 地址可編程放大器的反向衰減器與步驟 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 215K |
| 代理商： | ARA2000 |
Data Sheet - Rev 2.2
06/2004
13
ARA2000
APPLICATION INFORMATION
Transmit Enable / Disable
The ARA2000 includes two amplification stages that
each can be shut down through external control pins
Vg1 and Vg2 (pins 6 and 23, respectively.) By
applying a slightly positive bias of typically +1.0 Volts,
the amplifier is enabled. In order to disable the
amplifier, the control pin needs to be pulled to
ground.
A practical way to implement the necessary control
is to use bias resistor networks similar to those
shown in the test circuit schematic (Figure 4.) Each
network includes a resistor shunted to ground that
serves as a pull-down to disable the amplifier when
no control voltage is applied. When a positive voltage
is applied, the network acts as a voltage divider that
presents the required +1.0 Volts to enable the
amplifier. By selecting different resistor values for
the voltage divider, the network can accommodate
different control voltage inputs.
The Vg1 and Vg2 pins may be connected together
directly, and controlled through a single resistor
network from a common control voltage.
Amplifier Bias Current
The I
SET
pins (7 and 22) set the bias current for the
amplification stages. Grounding these pins results
in the maximum possible current. By placing a
resistor from the pin to ground, the current can be
reduced. The recommended bias conditions use
the configuration shown in the test circuit schematic
in Figure 4.
Thermal Layout Considerations
The device package for the ARA2000 features a heat
slug on the bottom of the package body. Use of the
heat slug is an integral part of the device design.
Soldering this slug to the ground plane of the PC
board will ensure the lowest possible thermal
resistance for the device, and will result in the longest
MTF (mean time to failure.)
A PC board layout that optimizes the benefits of the
heat slug is shown in Figure 18. The via holes located
under the body of the device must be plated through
to a ground plane layer of metal, in order to provide a
sufficient heat sink. The recommended solder mask
outline is shown in Figure 19.
Figure 18: PC Board Layout
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ARA2000S12P1 | Address-Programmable Reverse Amplifier with Step Attenuator |
| ARA2001 | CATV Reverse Amplifier with step Attenuator |
| ARA2001S23 | ER 4C 2#16 2#8 SKT RECP WALL |
| ARA2004 | Reverse Amplifier with Step Attenuator |
| ARA2004RS12P1 | Reverse Amplifier with Step Attenuator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ARA2000_11 | 制造商:ANADIGICS 制造商全稱:ANADIGICS, Inc 功能描述:Address-Programmable Reverse Amplifier with Step Attenuator |
| ARA2000S12P1 | 制造商:ANADIGICS 制造商全稱:ANADIGICS, Inc 功能描述:Address-Programmable Reverse Amplifier with Step Attenuator |
| ARA2000S12P9 | 制造商:ANADIGICS Inc 功能描述:BROADBAND/CATV (75 OHM) REVERSE AMPLIFIER |
| ARA2000S12TR | 制造商:ANADIGICS Inc 功能描述:BROADBAND/CATV (75 OHM) REVERSE AMPLIFIER |
| ARA2000S23 | 制造商:ANADIGICS 制造商全稱:ANADIGICS, Inc 功能描述:CATV Reverse Amplifier with step Attenuator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。