- 您現在的位置：買賣IC網 > PDF目錄353104 > EL2020CM (INTERSIL CORP) 50MHz Current Feedback Amplifier PDF資料下載
參數資料
| 型號： | EL2020CM |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 50MHz Current Feedback Amplifier |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO20 |
| 封裝： | SOL-20 |
| 文件頁數： | 5/20頁 |
| 文件大小： | 409K |
| 代理商： | EL2020CM |
EL2020C
50 MHz Current Feedback Amplifier
Application Information
Contd
Video Distribution Amplifier
The distribution amplifier shown below features
a difference input to reject common mode signals
on the 75
X coax cable input Common mode re-
jection is often necessary to help to eliminate
60 Hz noise found in production environments
Video Distribution Amplifier
with Difference Input
2020 – 15
EL2020 DisableEnable Operation
The EL2020 has an enabledisable control input
at pin 8 The device is enabled and operates nor-
mally when pin 8 is left open or returned to pin 7
VCC When more than 250 mA is pulled from pin
8 the EL2020 is disabled The output becomes a
high impedance the inverting input is no longer
driven to the positive input voltage and the sup-
ply current is halved To make it easy to use this
feature there is an internal resistor to limit the
current to a safe level (E11 mA) if pin 8 is
grounded
To draw current out of pin 8 an ‘‘open collector
output’’ logic gate or a discrete NPN transistor
can be used This logic interface method has the
advantage of level shifting the logic signal from
5V supplies to whatever supply the EL2020 is op-
erating on without any additional components
Using the EL2020 as a Multiplexer
An interesting use of the enable feature is to com-
bine several amplifiers in parallel with their out-
puts common This combination then acts simi-
lar to a MUX in front of an amplifier A typical
circuit is shown
When the EL2020 is disabled the DC output im-
pedance is very high over 10 k
X However there
is also an output capacitance that is non-linear
For signals of less than 5V peak to peak the out-
put capacitance looks like a simple 15 pF capaci-
tor However for larger signals the output capac-
itance becomes much larger and non-linear
The example multiplexer will switch between
amplifiers in 5
ms for signals of less than g2V on
the outputs For full output signals of 20V peak
to peak the selection time becomes 25
ms The
disabled outputs also present a capacitive load
and therefore only three amplifiers can have their
outputs shorted together However an unlimited
number can sum together if a small resistor
(25
X) is inserted in series with each output to
isolate it from the ‘‘bus’’ There will be a small
gain loss due to the resistors of course
Using the EL2020 as a Multiplexer
2020 – 16
13
相關PDF資料 |
PDF描述 |
|---|---|
| EL2020CN | 50MHz Current Feedback Amplifier |
| EL4583CSZ | Sync Separator, 50% Slice, S-H, Filter, Horizontal sync output |
| EL4583CSZ-T13 | Sync Separator, 50% Slice, S-H, Filter, Horizontal sync output |
| EL4583CSZ-T7 | Sync Separator, 50% Slice, S-H, Filter, Horizontal sync output |
| EL5293ACY | IGBT Module; Power Dissipation, Pd:450W; Current Rating:75A; Voltage Rating:1200V RoHS Compliant: Yes |
相關代理商/技術參數 |
參數描述 |
|---|---|
| EL2020CN | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:50MHz Current Feedback Amplifier |
| EL2020CN/E+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Feedback Operational Amplifier |
| EL2020CPL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Feedback Operational Amplifier |
| EL2020D | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:50 MHz Current Feedback Amplifier |
| EL2020J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Feedback Operational Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復。