Dear Team,
I need to design a current sensing circuit for one of my ASIC evaluation board.
The ASIC will take the current from 0.5mA to 1mA from a 1.8V Supply. Whatever the current it is taking voltage at Vout should remain constant at 1.8V.
Please see the attached circuit . The 1.8V supply is provided to ASIC via buffer, the current sense resistor is placed in the output of the buffer.
The issue I am facing is when ASIC is taking current the 1.8v gets dropped. May I know how to fix this issue.
Regards
Hari
I need to design a current sensing circuit for one of my ASIC evaluation board.
The ASIC will take the current from 0.5mA to 1mA from a 1.8V Supply. Whatever the current it is taking voltage at Vout should remain constant at 1.8V.
Please see the attached circuit . The 1.8V supply is provided to ASIC via buffer, the current sense resistor is placed in the output of the buffer.
The issue I am facing is when ASIC is taking current the 1.8v gets dropped. May I know how to fix this issue.
Regards
Hari