ta2020 jack sensing

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Hello,

For the past months I've been designing a pcb for the well known tripath ta2020. I added a opamp to get a headphone output. However I would like to mute the ta2020 when I insert the headphones into the jack.

According to the datasheet I need to drive the mute/sleep pin high to mute the amp. What would be the easiest way to incorporate jack sensing into my design?
 
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