OP467 Datasheet, PDF (12/16 Pages) Analog Devices – Quad Precision, High Speed Operational Amplifier

OP467
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.
100
OUTPUT ⁹⁰
⌬V1
15.8V
10
INPUT _0%
10V 10V
200␮s
DLY 4.806␮s
100
90
10
0%
5V
5V
20ns
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 kΩ 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 kΩ
R_C is used for adjusting the dc common-mode rejection, and C_C
is used for ac common-mode rejection adjustments.
–V_IN
C_C
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.
+V_IN
1k⍀
R_G 10k⍀
1k⍀
10k⍀
2k⍀
2k⍀
5pF
2k⍀
OUTPUT
1.9k⍀
R_C
200⍀
10T
Figure 40. A High Speed Instrumentation Amplifier
DLY 9.842␮s
100
90
0.01% 10V STEP
V_S = ؎15V
NEG SLOPE
10
0%
5V
5V
20ns
Figure 38. Saturation Recovery Time, Positive Rail
2.5mV
–2.5mV
Figure 41. Instrumentation Amplifier Settling Time to
0.01% for a 10 V Step Input (Negative Slope)
–12–
REV. C