Question: I am considering DC Coupling the amplifier's inputs in my design. Is this OK and will I face any problems?
Answer: The TPA6140A2 will work very well with DC coupled inputs. The input circuitry was designed for optimum performance with AC coupling; however, the main thing that you may notice is that there is a slightly increased artifact when the amplifier is powered on or the SHUTDOWN function is exercised. Since the audio artifact from this amplifier is extremely, a slight increase may not be a concer for you.
Please reveiw the datasheet for common mode voltage levels and the attached presentation for more details.
Rgds,
Fred