TL032: Extended capacitive load drive

Anna

Part Number: TL032
Other Parts Discussed in Thread: OPA2990,

Hi Dear,

As shown in the following figure, OPA2990 can expand capacitive load driving. If the terminal is a butterfly valve or a PLC or other different equipment, how can users match the R & C value? Does TL032 also support expanding capacity loads?

Additionally, what is the output current of OPA2990?The manual does not include the Output current, IO parameter

11 months ago

0 Jerry Madalvanos 11 months ago

TI__Mastermind 26441 points

Hey Anna,

The datasheet of the butterfly valve or PLC would need to include the equivalent series/parallel resistance or capacitance, and from there you can make an equivalent circuit in a SPICE simulator like TINA-TI or PSpice for TI.

This method for extending capacitive load drive of the amplifier is not unique to OPA2990, it can be done with many amplifiers. For more information on how this is done, please see the following TI Precision Labs Video, under the stability series called Isolation Resistor. https://www.ti.com/video/series/precision-labs/ti-precision-labs-op-amps.html

Best,
Jerry

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TL032: Extended capacitive load drive