TAS2553: PWM Input to the AIN channels

In my application I wish to use a single ended PWM input for the time being and at a later date switch over to PDM input on the same PCB. In either case I need volume control via I2C (or SPI).  I have several questions related to this use. First, is there any issue with using single ended PWM input to the AIN (assuming I put a simple filter on the outside)? What is the frequency range of the output that I can expect with this method? Second, what is the expected frequency range of the output with PDM at 64 x 48,000 Hz? (I am assuming full 20 kHz plus range.) Finally, if this chip is not an ideal solution, what might be a better chip to use. My power requirement is 0.5 to 2 W in to 8 ohms.