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LM4875: Troubles with LM4875

Jim Flanagan
Prodigy 60 points
Part Number: LM4875

I am having an issue with applying the LM4875 in my design.  I using the standard application schematic and am noticing

that with NO input drive and the gain control (external DAC driving pin 4) set to about 3V (positive gain), the part is drawing around 280 mA. 

The Headphone sense line is pulled low through a 100 ohm resistor so the part is set for bridged mode.   The decoupling is shown

and although it could be improved upon, I am wondering if these parts are sensitive to self oscillation. So, is this is normal

behavior or have I damaged the part.  Any advice would be appreciated.

Thanks

Jim