In the DSR4 datasheet, it is mentioned that there is an additional buffer at each analog output, this buffer shifts the the differential range of -0.5V~0.5V to 0.8V~1.8V. Does it mean that this buffer shifts a voltage of about 1.3V for the primary differential range? 

       Again for the differential range of -0.5V~0.5V, can the common mode voltage of the analog output at OUT+/OUT-  be chaned? In the example presented in the datasheet, OUT+ is 0.8V~1.8V and OUT- is 1.8V~0.8V. So for an output swing of 2V p-p, can the common mode voltage be modified to the desired value? Supposed that the input ranges from -0.5V~0.5V.

                                                      

     Thank you!

                                             Jinhong Wang