OPA992 datasheet(23/68 Pages) TI

номер детали	OPA992

подробное описание детали	OPAx992 40-V Rail-to-Rail Input/Output, Low Offset Voltage, Low Noise Op Amp

PDF	68 Pages

Scroll/Zoom	100%

производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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23 / 68 page

For additional drive capability in unity-gain configurations, improve capacitive load drive by inserting a small

resistor, RISO, in series with the output, as shown in Figure 7-7. This resistor significantly reduces ringing

and maintains DC performance for purely capacitive loads. However, if a resistive load is in parallel with the

capacitive load, then a voltage divider is created, thus introducing a gain error at the output and slightly reducing

the output swing. The error introduced is proportional to the ratio RISO / RL, and is generally negligible at low

output levels. A high capacitive load drive makes the OPAx992 well suited for applications such as reference

buffers, MOSFET gate drives, and cable-shield drives. The circuit shown in Figure 7-7 uses an isolation resistor,

RISO, to stabilize the output of an op amp. RISO modifies the open-loop gain of the system for increased phase

margin.

load

out

iso

-V

Figure 7-7. Extending Capacitive Load Drive With the OPA992

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OPA992, OPA2992, OPA4992

SBOSA10B – JUNE 2021 – REVISED DECEMBER 2021

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OPA992 датащи(PDF) 23 Page - Texas Instruments