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PDF EL5157 Data sheet ( Hoja de datos )
| Número de pieza | EL5157 | |
| Descripción | (EL5156 - EL5257) 600MHz Amplifiers | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
PRELIMINARY
Data Sheet
EL5156, EL5157, EL5256, EL5257
July 2, 2004
FN7386.2
<1mV Voltage Offset, 600MHz Amplifiers
The EL5156, EL5157, EL5256, and
EL5257 are 600MHz bandwidth -3dB
voltage mode feedback amplifiers with
DC accuracy of <0.01%, 1mV offsets and 40kV/V open loop
gains. These amplifiers are ideally suited for applications
ranging from precision measurement instrumentation to high
speed video and monitor applications demanding the very
highest linearity at very high frequency. Capable of operating
with as little as 6.0mA of current from a single supply ranging
from 5V to 12V and dual supplies ranging from ±2.5V to
±5.0V these amplifiers are also well suited for handheld,
portable and battery-powered equipment. With their
capability to output as much as 140mA, member of this
family is comfortable with demanding load conditions.
Single amplifiers are available in SOT-23 packages and
duals in a 10-pin MSOP package for applications where
board space is critical. Additionally, singles and duals are
available in the industry-standard 8-pin SO package. All
parts operate over the industrial temperature range of -40°C
to +85°C.
Orderingwww.DataSheet4U.com Information
PART
NUMBER
PACKAGE TAPE & REEL PKG. DWG. #
EL5156IS
8-Pin SO
-
MDP0027
EL5156IS-T7
8-Pin SO
7” MDP0027
EL5156IS-T13
8-Pin SO
13”
MDP0027
EL5157IW-T7 5-Pin SOT-23 7” (3K pcs)
MDP0038
EL5157IW-T7A 5-Pin SOT-23 7” (250 pcs)
MDP0038
EL5256IY
10-Pin MSOP
-
MDP0043
EL5256IY-T7 10-Pin MSOP
7”
MDP0043
EL5256IY-T13 10-Pin MSOP
13”
MDP0043
EL5257IS
8-Pin SO
-
MDP0027
EL5257IS-T7
8-Pin SO
7” MDP0027
EL5257IS-T13
8-Pin SO
13”
MDP0027
EL5257IY
8-Pin MSOP
-
MDP0043
EL5257IY-T7 8-Pin MSOP
7”
MDP0043
EL5257IY-T13 8-Pin MSOP
13”
MDP0043
Features
• 600MHz -3dB bandwidth, 240MHz 0.1dB bandwidth
• 700V/µs slew rate
• <1mV input offset
• Very high open loop gains 92dB
• Low supply current = 6mA
• 140mA output current
• Single supplies from 5V to 12V
• Dual supplies from ±2.5V to ±5V
• Fast disable on the EL5156 and EL5256
• Low cost
Applications
• Imaging
• Instrumentation
• Video
• Communications devices
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
1 page  
EL5156, EL5157, EL5256, EL5257
Typical Performance Curves (Continued)
5
4
AV=+2
RL=500Ω
3 RF=RG=500Ω
2
1
0
-1
-2
22pF
10pF
8.2pF
4.7pF
0pF
-3
-4
-5
100K
1M
10M
100M
1G
FREQUENCY (Hz)
FIGURE 5. SMALL SIGNAL FREQUENCY RESPONSE FOR
VARIOUS CL
5
4
AV=+5
RL=500Ω
3
2
1
0
-1
100pF
82pF
68pF
22pF
-2
-3
-4
-5
100K
1M
10M
100M
FREQUENCY (Hz)
1G
FIGURE 7. SMALL SIGNAL FREQUENCY RESPONSE FOR
VARIOUS CL
5
4
3
2
1
0
-1
-2
-3
AV=+1
RL=500Ω
-4 CL=4.7pF
-5
100K
1M
AV=+1
AV=+2
AV=+5
10M
100M
FREQUENCY (Hz)
1G
FIGURE 9. EL5256 SMALL SIGNAL FREQUENCY
RESPONSE FOR VARIOUS GAINS
16
14
AV=+2
RF=RG=562Ω
12 RL=150Ω
10
8
6
4
2
180pF
100pF
33pF
10pF
0pF
0
-2
-4
100K
1M
10M
100M
FREQUENCY (Hz)
1G
FIGURE 6. SMALL SIGNAL FREQUENCY RESPONSE FOR
VARIOUS CL
5
4
RL=500Ω
CL=4.7pF
3 AV=+1
2
1
0
-1
-2
-3
-4
±2.0V
±3.0V
±4.0V
±5.0V
100K
1M 10M
FREQUENCY (Hz)
100M
500M
FIGURE 8. FREQUENCY RESPONSE vs POWER SUPPLY
4
3
VS=±5V
RF=620Ω
2 RL=150Ω
1
AV=-1
0
-1
-2
-3 AV=-2
-4
-5
-6
100K
1M
10M
100M
FREQUENCY (Hz)
1G
FIGURE 10. SMALL SIGNAL INVERTING FREQUENCY
RESPONSE FOR VARIOUS GAINS
5
5 Page 
EL5156, EL5157, EL5256, EL5257
Product Description
The EL5156, EL5157, EL5256, and EL5257 are wide
bandwidth, single or dual supply, low power and low offset
voltage feedback operational amplifiers. Both amplifiers are
internally compensated for closed loop gain of +1 or greater.
Connected in voltage follower mode and driving a 500Ω
load, the -3dB bandwidth is about 610MHz. Driving a 150Ω
load and a gain of 2, the bandwidth is about 180MHz while
maintaining a 600V/µs slew rate. The EL5156 and EL5256
are available with a power down pin to reduce power to
17µA typically while the amplifier is disabled.
Input, Output and Supply Voltage Range
The EL5156 and EL5157 families have been designed to
operate with supply voltage from 5V to 12V. That means for
single supply application, the supply voltage is from 5V to
12V. For split supplies application, the supply voltage is from
±2.5V to ±5V. The amplifiers have an input common mode
voltage range from 1.5V above the negative supply (VS- pin)
to 1.5V below the positive supply (VS+ pin). If the input
signal is outside the above specified range, it will cause the
output signal distorted.
The outputs of the EL5156 and EL5157 families can swing
from -4V to 4V for VS = ±5V. As the load resistance becomes
lower, the output swing is lower. If the load resistor is 500Ω,
the output swing is about -4V at a 4V supply. If the load
resistor is 150Ω, the output swing is from -3.5V to 3.5V.
Choice of Feedback Resistor and Gain Bandwidth
Product
For applications that require a gain of +1, no feedback
resistor is required. Just short the output pin to the inverting
input pin. For gains greater than +1, the feedback resistor
forms a pole with the parasitic capacitance at the inverting
input. As this pole becomes smaller, the amplifier's phase
margin is reduced. This causes ringing in the time domain
and peaking in the frequency domain. Therefore, RF can't be
very big for optimum performance. If a large value of RF
must be used, a small capacitor in the few Pico farad range
in parallel with RF can help to reduce the ringing and
peaking at the expense of reducing the bandwidth.
For gain of +1, RF = 0 is optimum. For the gains other than
+1, optimum response is obtained with RF between 500Ω to
750Ω.
The EL5156 and EL5157 families have a gain bandwidth
product of 210MHz. For gains > = 5, its bandwidth can be
predicted by the following equation: (Gain)X(BW) = 210MHz.
Video Performance
For good video performance, an amplifier is required to
maintain the same output impedance and the same
frequency response as DC levels are changed at the output.
This is especially difficult when driving a standard video load
of 150Ω, because of the change in output current with DC
level. The dG and dP for these families are about 0.006%
and 0.04%, while driving 150Ω at a gain of 2. Driving high
impedance loads would give a similar or better dG and dP
performance.
Driving Capacitive Loads and Cables
The EL5156 and EL5157 families can drive 27pF loads in
parallel with 500Ω with less than 5dB of peaking at gain of
+1. If less peaking is desired in applications, a small series
resistor (usually between 5Ω to 50Ω) can be placed in series
with the output to eliminate most peaking. However, this will
reduce the gain slightly. If the gain setting is greater than 1,
the gain resistor RG can then be chosen to make up for any
gain loss which may be created by the additional series
resistor at the output.
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, a back-termination series resistor at the
amplifier's output will isolate the amplifier from the cable and
allow extensive capacitive drive. However, other applications
may have high capacitive loads without a back-termination
resistor. Again, a small series resistor at the output can help
to reduce peaking.
Disable/Power-Down
The EL5156 and EL5256 can be disabled and their output
placed in a high impedance state. The turn off time is about
330ns and the turn on time is about 130ns. When disabled,
the amplifier's supply current is reduced to 17µA typically,
thereby effectively eliminating the power consumption. The
amplifier's power down can be controlled by standard TTL or
CMOS signal levels at the ENABLE pin. The applied logic
signal is relative to VS- pin. Letting the ENABLE pin float or
applying a signal that is less than 0.8V above VS- will enable
the amplifier. The amplifier will be disabled when the signal
at ENABLE pin is above VS+ -1.5V.
Output Drive Capability
The EL5156 and EL5157 families do not have internal short
circuit protection circuitry. They have a typical short circuit
current of 95mA and 70mA. If the output is shorted
indefinitely, the power dissipation could easily overheat the
die or the current could eventually compromise metal
integrity. Maximum reliability is maintained if the output
current never exceeds ±40mA. This limit is set by the design
of the internal metal interconnect. Note that in transient
applications, the part is robust.
Power Dissipation
With the high output drive capability of the EL5156 and
EL5157 families, it is possible to exceed the 125°C absolute
maximum junction temperature under certain load current
conditions. Therefore, it is important to calculate the
maximum junction temperature for the application to
determine if the load conditions or package types need to be
modified for the amplifier to remain in the safe operating
area.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EL5157.PDF ] | |
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