參數(shù)資料
型號(hào)： OP467
廠商： Analog Devices, Inc.
英文描述： Quad Precision, High Speed Operational Amplifier
中文描述： 四精密，高速運(yùn)算放大器
文件頁(yè)數(shù)： 12/16頁(yè)
文件大?。?/td> 242K
代理商： OP467
OP467
REV. C
–12–
Generally, it is a good design practice to isolate the amplifier’s
output from any capacitive load by placing a resistor between
the amplifier’s output and the rest of the circuits. A series resis-
tor of 10 to 100 ohms is normally sufficient to isolate the output
from a capacitive load.
The OP467 is internally compensated to provide stable opera-
tion, and is capable of driving large capacitive loads without
oscillation.
Sockets are not recommended since they increase the lead in-
ductance/capacitance and reduce the power dissipation of the
package by increasing the leads thermal resistance. If sockets
must be used, use Teflon or pin sockets with the shortest leads
possible.
PHASE REVERSAL
The OP467 is immune to phase reversal; its inputs can exceed
the supply rails by a diode drop without any phase reversal.
OUTPUT
INPUT
10
0%
100
90
200
m
s
10V
10V
D
V1
15.8V
Figure 37. No Phase Reversal (A
V
= +1)
SATURATION RECOVERY TIME
The OP467 has a fast and symmetrical recovery time from ei-
ther rail. This feature is very useful in applications such as high
speed instrumentation and measurement circuits, where the
amplifier is frequently exposed to large signals that overload the
amplifier.
10
0%
100
90
5V
DLY 9.842
m
s
20ns
5V
Figure 38. Saturation Recovery Time, Positive Rail
10
0%
100
90
5V
DLY 4.806
m
s
20ns
5V
Figure 39. Saturation Recovery Time, Negative Rail
HIGH SPEED INSTRUMENTATION AMPLIFIER
The OP467 performance lends itself to a variety of high speed
applications, including high speed precision instrumentation
amplifiers. Figure 40 represents a circuit commonly used for
data acquisition, CCD imaging and other high speed application.
Circuit gain is set by R
G
. A 2 k
resistor will set the circuit gain
to 2; for unity gain, remove R
G
. For any other gain settings use
the following formula:
G = 2/R
G
Resistor Value is in k
R
C
is used for adjusting the dc common-mode rejection, and C
C
is used for ac common-mode rejection adjustments.
OUTPUT
–V
IN
+V
IN
1k
V
2k
V
1k
V
2k
V
10k
V
10k
V
5pF
1.9k
V
R
C
200
V
10T
2k
V
C
C
R
G
Figure 40. A High Speed Instrumentation Amplifier
2.5mV
–2.5mV
0.01% 10V STEP
V
S
=
6
15V
NEG SLOPE
Figure 41. Instrumentation Amplifier Settling Time to
0.01% for a 10 V Step Input (Negative Slope)
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