Hi, in the datasheet of AD8475, it says that the voltage supply can be +-5V and +VS can be connected to 5V while -Vs can be connected to -5V or AGND. However, during simulation, it reports an error of singular matrix when connect -VS to -5V. Moreover, in CN-0385, CN-0345, CN-0269, all reference designs connect -Vs to AGND instead of -5V. So,
1, Is there any problem in connecting -Vs of AD8475 to -5V ?
2, I want to use ad8475 to drive AD4003, is it safe to use only 5VA and connect -VS to AGND without sacrificing any performances (i.e., CMR, THD, etc.)
Try ADA4940 or ADA4807. Also, please see Applications Information Section of the AD4003 datasheet.
Please note that simulation sometimes has computational problems that have nothing to do with actual part performance.
There are just two main concerns when setting the Vsupplies.
Thanks for your reply. Is there any alternate ADC drivers that can driver AD4003, 18bit, 2MSPS ADC with acceptable performance?