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高速运放开关

Other Parts Discussed in Thread: OPA320

OPA320与OPA320S主要区别在于是否有使能引脚,如果用于低功耗电路中,需要快速切换运放的开关工作状态,是选择增加外部供电切换电路好还是使用带有使能引脚的运放好?在确保运放精度能达到稳定的前提下尽量做到低功耗应该如何选择?

  • 我个人认为这种带使能引脚的切换低功耗更好一些. 因为disable time和enable time时间非常短, full enable time只有10us,disable time只有3us时间.

    假如通过外部供电切换的话,那么shut down的时间和重新上电的时间会在ms级. 并且外部供电切换也很有可能引入噪音.