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AD5428 without IV converter


We designed programmable current source circuit using DAC as interface between FPGA and Current driver section

As I need to get fast response time, I am trying to get rid of using separate IV converter. How do we get rid of IV opamp and fed reference input to current driver section?

AD5428 used to fed reference voltage to two current drivers

Thanks and Best Regards,

Anandkumar C E