OPA192 Datasheet, PDF (23/35 Pages) Texas Instruments – High Voltage, Rail-to-Rail Input/Output, Precision Operational Amplifiers, e-trim Series

www.ti.com
OPA192
OPA2192
OPA4192
SBOS620A – DECEMBER 2013 – REVISED JANUARY 2014
APPLICATION INFORMATION
TI PRECISION DESIGNS
The OPA192 is featured in several TI Precision Designs, available online at
http://www.ti.com/ww/en/analog/precision-designs/. TI Precision Designs are analog solutions created by TI’s
precision analog applications experts and offer the theory of operation, component selection, simulation,
complete PCB schematic and layout, bill of materials, and measured performance of many useful circuits.
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 can ramp 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 OPA192 make it an optimal amplifier to achieve slew rate control for both
dual- and single-supply systems. Figure 53 shows the OPA192 in a slew-rate limit design.
Op Amp Gain Stage
VEE

VIN
OPA192
 ^V+
VCC
Slew Rate Limiter
R2
1.6 MŸ
C1
470 nF
R1
1.69 kŸ
VEE

OPA192
 ^V+
VCC
VOUT
RL
10 kŸ
Figure 53. 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, refer to TI Precision Design TIDU026 - Slew Rate Limiter Uses One Op Amp
Copyright © 2013–2014, Texas Instruments Incorporated
Submit Documentation Feedback
23
Product Folder Links: OPA192 OPA2192 OPA4192