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AMC7832: AVSSa connection

Part Number: AMC7832

Hi Supporter

My customer adopt AMC7832 solution. In fact, they need to support negative DAC voltage range to about -5V. AVEE is connedted to -7V, VRANGEA is connected to 2.5V. But they do a wrong connection for AVSSA, AVSSA is connected to GND. Is it ok to support negative DAC voltage with AVSSa connected to GND or must connect AVSSA to AVEE? Thanks a lot!

Regards

David