Part Number: ADC78H89 Dear Technical Support Team, My system needs to supply AVDD = 5V and DVDD = 3.3V for ADC78H89 . However I forgot to connect DVDD = 3.3V. (Only AVDD =5V ). It seems that digital interface like DOUT shows approximately 2.3V for high level and it seems operate digital data from AD conversion with its real ability. Do you know why digital interface like DOUT shows approximately 2.3V without DVDD? It looks strange behavior. If possible , could you explain it from equivalent circuit? (For example, ESD diode drop between AVDD and DVDD) Of course, I have been trying to connect DVDD=3.3V. Best Regards, ttd
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