AD9253 Common Mode Issue


We have designed the boards and we found that the Common mode 0.9v coming from ADC is not compatible to the differential driver(LMH5401) used.

LMH5401 needs min 1.4V as common mode and we have resistor divider path to generate the voltage required.


1. We Can Generate 1.4V and connect to VOCM pin of Differential Driver 

2.Do we need to disable the VCM control using 0x102 and apply 1.4V on the VCM pin of ADC ? or we can leave this pin floating with 0.1uF decoupling cap.

Please suggest