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Operational amplifier stability compensation methods for capacitive loading applied to TS507

Posted: 28 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:operational amplifier? capacitive load? TS507?

Who has never experienced oscillations issues when using an operational amplifier? Op amps are often used in a simple voltage follower configuration. However, this is not the best configuration in terms of capacitive loading and potential risk of oscillations.

Capacitive loads have a big impact on the stability of operational amplifier-based applications. Several compensation methods exist to stabilize a standard op-amp. This application note describes the most common ones, which can be used in most cases.

The general theory of each compensation method is explained, and based on this, specific data is provided for the TS507. The TS507 is a high precision rail-to-rail amplifier, with very low input offset voltage and a 1.9MHz gain bandwidth product, which is available in SOT23-5 and SO-8 packages.

This application note simplifies the task of designing an application that includes the TS507. It spares you the time-consuming effort of trying numerous combinations on bench, and it is also much more accurate than using Spice models which are not designed to study system stability, even though they can give a general trend.

View the PDF document for more information.

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