OPA192-Q1 Datasheet, PDF (33/42 Pages) Texas Instruments – 36-V, Precision, Rail-to-Rail Input/Output, Low-Offset Voltage, Low-Input Bias Current Op Amp With e-trim

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OPA192-Q1, OPA2192-Q1, OPA4192-Q1
SBOS850 – MAY 2017
9.2.2 Slew Rate Limit for Input Protection
In control systems for valves or motors, abrupt changes in voltages or currents can cause mechanical damages.
By controlling the slew rate of the command voltages into the drive circuits, the load voltages ramps up and down
at a safe rate. For symmetrical slew-rate applications (positive slew rate equals negative slew rate), one
additional op amp provides slew-rate control for a given analog gain stage. The unique input protection and high
output current and slew rate of the OPAx192-Q1 make the device an optimal amplifier to achieve slew rate
control for both dual- and single-supply systems.Figure 68 shows the OPAx192-Q1 in a slew-rate limit design.
Op Amp Gain Stage
V^EE
-
V^IN
OPAx192-Q1
+ ^V+
V^CC
Slew Rate Limiter
R2
1.6 MΩ
C1
470 nF
R1
1.69 kΩ
V^EE
-
OPAx192-Q1
+ ^V+
V^CC
V^OUT
R^L
10 kΩ
Copyright © 2017, Texas Instruments Incorporated
Figure 68. Slew Rate Limiter Uses One Op Amp
For step-by-step design procedure, circuit schematics, bill of materials, PCB files, simulation results, and test
results, see TI Precision Design TIDU026, Slew Rate Limiter Uses One Op Amp.
Copyright © 2017, Texas Instruments Incorporated
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