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TPA6166A Sharing Headphone and Line Out

TPA6166A detects automatically Stereo Headset and Line Out Cable. In Headset-Mode the Headphone amplifier is connected to the output. How is in Line Out-Mode the output internally routed? Which impedance has then the output? In my application I am sharing Headphone and Line Out with the same jack. How must I connect the TPA6166A output to the jack tip and ring1?