AD5440 AGND and DGND

Hi

AGND in the datasheet also refers to the IOUT2 in the abs. max spec table. Although, it should be noted that for proper operation, AGND voltage is very limited so as not to affect the linearity and degrade the performance of the R2R ladder. (0.3V to 0.8V).

DGND represents the device's ground. Table 3 represents the abs max voltages applied to each pin with respect to this ground. 

Best regards,

Ian

Thank you for your answer

Thank you for your answer