OPA2197IDRG4 datasheet(29/56 Pages) TI2

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VCC

VEE

1.6

0Ÿ

VOUT

V+

VIN

NŸ

1.69

NŸ

470 nF

Op Amp Gain Stage

Slew Rate Limiter

OPA197

VCC

VEE

V+

OPA197

OPA197, OPA2197, OPA4197

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SBOS737C – JANUARY 2016 – REVISED MARCH 2018

Product Folder Links: OPA197 OPA2197 OPA4197

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8.2.2 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 OPAx197 make the device an optimal amplifier to achieve slew rate control

for both dual- and single-supply systems.Figure 55 shows the OPA197 in a slew-rate limit design.

Figure 55. 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.

OPA2197IDRG4 Datasheet(PDF) 29 Page - Texas Instruments