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参数资料
| 型号： | EL2150CN |
| 元件分类： | 运算放大器 |
| 英文描述： | 125 MHz Single Supply, Clamping Op Amps |
| 中文描述： | 125 MHz的单电源，钳位运算放大器 |
| 文件页数： | 4/20页 |
| 文件大小： | 488K |
| 代理商： | EL2150CN |
EL2150CEL2157C
125 MHz Single Supply Clamping Op Amps
Applications Information
Product Description
The EL2150CEL2157C are the industry’s fastest
single supply operational amplifiers Connected
in voltage follower mode their b3dB bandwidth
is 125 MHz while maintaining a 275 V
ms slew
rate With an input and output common mode
range that includes ground these amplifiers were
optimized for single supply operation but will
also accept dual supplies They operate on a total
supply voltage range as low as a27V or up to
a
12V This makes them ideal for a3V applica-
tions especially portable computers
While many amplifiers claim to operate on a sin-
gle supply and some can sense ground at their
inputs most fail to truly drive their outputs to
ground If they do succeed in driving to ground
the amplifier often saturates causing distortion
and recovery delays However special circuitry
built into the EL2150CEL2157C allows the out-
put to follow the input signal to ground without
recovery delays
Power Supply Bypassing And Printed
Circuit Board Layout
As with any high-frequency device good printed
circuit board layout is necessary for optimum
performance Ground plane construction is high-
ly recommended Lead lengths should be as short
as possible The power supply pins must be well
bypassed to reduce the risk of oscillation The
combination of a 47
mF tantalum capacitor in
parallel with a 01
mF ceramic capacitor has been
shown to work well when placed at each supply
pin For single supply operation where pin 4
(VSb) is connected to the ground plane a single
47
mF tantalum capacitor in parallel with a 01
mF ceramic capacitor across pins 7 and 4 will suf-
fice
For good AC performance parasitic capacitance
should be kept to a minimum Ground plane con-
struction should be used Carbon or Metal-Film
resistors are acceptable with the Metal-Film re-
sistors giving slightly less peaking and band-
width because of their additional series induc-
tance Use of sockets particularly for the SO
package should be avoided if possible Sockets
add parasitic inductance and capacitance which
will result in some additional peaking and over-
shoot
Supply Voltage Range and
Single-Supply Operation
The EL2150CEL2157C have been designed to
operate with supply voltages having a span of
greater than 27V and less than 12V In practical
terms this means that the EL2150CEL2157C
will operate on dual supplies ranging from
g
135V to g6V
With a single-supply
the
EL2150CEL2157C will operate from a27V to
a
12V Performance has been optimized for a sin-
gle a5V supply
Pins 7 and 4 are the power supply pins The posi-
tive power supply is connected to pin 7 When
used in single supply mode pin 4 is connected to
ground When used in dual supply mode the neg-
ative power supply is connected to pin 4
As supply voltages continue to decrease it be-
comes necessary to provide input and output
voltage ranges that can get as close as possible to
the supply voltages
The EL2150CEL2157C
have an input voltage range that includes the
negative supply and extends to within 12V of the
positive supply So for example on a single a5V
supply the EL2150CEL2157C have an input
range which spans from 0V to 38V
The output range of the EL2150CEL2157C is
also quite large It includes the negative rail and
extends to within 1V of the top supply rail On a
a
5V supply the output is therefore capable of
swinging from 0V to a4V On split supplies the
output will swing g4V If the load resistor is tied
to the negative rail and split supplies are used
the output range is extended to the negative rail
Choice Of Feedback Resistor RF
The feedback resistor forms a pole with the input
capacitance As this pole becomes larger phase
margin is reduced This increases ringing in the
time domain and peaking in the frequency do-
main Therefore RF has some maximum value
which should not be exceeded for optimum per-
formance If a large value of RF must be used a
small capacitor in the few picofarad range in par-
allel with RF can help to reduce this ringing and
peaking at the expense of reducing the band-
width
12
相关PDF资料 |
PDF描述 |
|---|---|
| EL2150CS | 125 MHz Single Supply, Clamping Op Amps |
| EL2150CW | 125 MHz Single Supply, Clamping Op Amps |
| EL2157CN | 125 MHz Single Supply, Clamping Op Amps |
| EL2157CS | 125 MHz Single Supply, Clamping Op Amps |
| EL2157C | 125 MHz Single Supply, Clamping Op Amp(125MHz 单电源钳位运算放大器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EL2150CS | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:125MHz Single Supply, Clamping Op Amps |
| EL2150CS WAF | 制造商:Intersil Corporation 功能描述: |
| EL2150CS-T13 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:125MHz Single Supply, Clamping Op Amps |
| EL2150CS-T7 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:125MHz Single Supply, Clamping Op Amps |
| EL2150CW | 制造商:ELANTEC 制造商全称:ELANTEC 功能描述:125 MHz Single Supply, Clamping Op Amps |
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