AP1158 Overview
AP1158 is an active filter IC for noise in the low frequency band in the various audio systems, and the like. It's possible to use AP1158 than a noise filter of discrete position (RC Filter, LC Filter) that the noise filter is posed of a saving mounting area and low drop-out voltage. It is available to use as low I/O voltage/low noise regulator.
AP1158 Key Features
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