OPA1677DBVT datasheet(18/51 Pages) TI

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8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

8.1.1 Capacitive Loads

The dynamic characteristics of the OPA167x series are optimized for commonly encountered gains, loads, and

operating conditions. The combination of low closed-loop gain and high capacitive loads decreases the phase

margin of the amplifier, and can lead to gain peaking or oscillations. As a result, heavier capacitive loads must be

isolated from the output. The simplest way to achieve this isolation is to add a small resistor (RS equal to 50 Ω,

for example) in series with the output.

This small series resistor also prevents excess power dissipation if the output of the device short-circuits. For

more details about analysis techniques and application circuits, see the Feedback Plots Define Op Amp AC

Performance application report, available for download from the TI website (www.ti.com).

OPA1677, OPA1678, OPA1679

SBOS855E – JANUARY 2017 – REVISED DECEMBER 2022

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OPA1677DBVT Datasheet(PDF) 18 Page - Texas Instruments