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參數(shù)資料
| 型號： | EL2074C |
| 英文描述： | 400 MHz Voltage-Feedback Amplifier(400MHz電壓反饋放大器) |
| 中文描述： | 400 MHz的電壓反饋放大器（400MHz的電壓反饋放大器） |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 333K |
| 代理商： | EL2074C |
EL2074C
400 MHz GBWP Gain-of-2 Stable Operational Amplifier
Applications Information
Contd
For signal transmission and distribution a back-
terminated cable (75
X in series at the drive end
and 75
X to ground at the receiving end) is pre-
ferred since the impedance match at both ends
will absorb any reflections However when dou-
ble termination is used the received signal is
halved therefore a gain of 2 configuration is typi-
cally used to compensate for the attenuation
The EL2074 has been designed to be among the
best video amplifiers in the marketplace today It
has been thoroughly characterized for video per-
formance in the topology described above and
the results have been included as minimum dG
and dP specifications and as typical performance
curves In a gain of a2 driving 150
X with stan-
dard video test levels at the input the EL2074
exhibits dG and dP of only 001% and 0015 at
NTSC and PAL Because dG and dP vary with
different DC offsets the superior video perform-
ance of the EL2074 has been characterized over
the entire DC offset range from b0714V to
a
0714V
For more information
refer to the
curves of dG and dP vs DC Input Offset
The excellent output drive capability of the
EL2074 allows it to drive up to 4 back-terminated
loads with excellent video performance With 4
150
X loads dG and dP are only 015% and 008
at NTSC and PAL For more information refer
to the curves for Video Performance vs Number
of 150
X Loads
Output Drive Capability
The EL2074 has been optimized to drive 50
X and
75
X loads It can easily drive 6 VPP into a 50X
load This high output drive capability makes the
EL2074 an ideal choice for RF IF and video ap-
plications Furthermore the current drive of the
EL2074 remains a minimum of 50 mA at low
temperatures The EL2074 is current-limited at
the output allowing it to withstand momentary
shorts to ground
However
power dissipation
with the output shorted can be in excess of the
power-dissipation capabilities of the package
Capacitive Loads
Although the EL2074 has been optimized to
drive resistive loads as low as 50
X capacitive
loads will decrease the amplifier’s phase margin
which may result in peaking overshoot and pos-
sible oscillation For optimum AC performance
capacitive loads should be reduced as much as
possible or isolated via a series output resistor
Coax lines can be driven as long as they are ter-
minated with their characteristic impedance
When properly terminated the capacitance of co-
axial cable will not add to the capacitive load
seen by the amplifier Capacitive loads greater
than 10 pF should be buffered with a series resis-
tor (Rs) to isolate the load capacitance from the
amplifier output A curve of recommended Rs vs
Cload has been included for reference Values of
Rs were chosen to maximize resulting bandwidth
without peaking
Printed-Circuit Layout
As with any high-frequency device good PCB
layout is necessary for optimum performance
Ground-plane construction is highly recommend-
ed as is good power supply bypassing A 1
mF–
10
mF tantalum capacitor is recommended in par-
allel with a 001
mF ceramic capacitor All lead
lengths should be as short as possible and all by-
pass capacitors should be as close to the device
pins as possible Parasitic capacitances should be
kept to an absolute minimum at both inputs and
at the output Resistor values should be kept un-
der 1000
X to 2000X because of the RC time con-
stants associated with the parasitic capacitance
Metal-film and carbon resistors are both accept-
able use of wire-wound resistors is not recom-
mended because of parasitic inductance Similar-
ly capacitors should be low-inductance for best
performance If possible solder the EL2074 di-
rectly to the PC board without a socket Even
high quality sockets add parasitic capacitance
and inductance which can potentially degrade
performance Because of the degradation of AC
performance due to parasitics the use of surface-
mount components (resistors capacitors etc) is
also recommended
10
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL2075C | 2 GHz Voltage-Feedback Amplifier(2 GHz 電壓反饋放大器) |
| EL2075 | 2GHz GBWP Gain-of-10 Stable Operational Amplifier |
| EL2075CN | 2GHz GBWP Gain-of-10 Stable Operational Amplifier |
| EL2075CS | 2GHz GBWP Gain-of-10 Stable Operational Amplifier |
| EL2082CJ | Analog Multiplier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL2074CN | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:400MHz GBWP Gain-of-2 Stable Operational Amplifier |
| EL2074CS | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:400MHz GBWP Gain-of-2 Stable Operational Amplifier |
| EL2074CS-T13 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:400MHz GBWP Gain-of-2 Stable Operational Amplifier |
| EL2074CS-T7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:400MHz GBWP Gain-of-2 Stable Operational Amplifier |
| EL2074J/883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
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