1)The 2.5Mohm resistors connected from VSENSE+ to VOUT and from VSENSE- to internal device ground are designed to protect the AD5750-2.
2)Yes, the VSENSE+ and VSENSE- pins helps to correct VOUT by remote sensing. The sense pins can be connected as close as possible to the load so that VOUT is maintained at the load and not at the VOUT pin. Also note that the sense pins are like feedback to the output amplifier so I'm not sure what you mean by "verifying the correctness of the transform from digital to analog signal". If you want to get the accuracy, you should compare the measured output with the expected/computed output.
This document was generated from the following discussion: Questions about chip AD5750-2BCPZ