earckens
Member
I need to measure the outgoing current on a PSU and am considering an INA219B.
Can I place its shunt resistor in the negative supply line yet connect it to a controller (Atmega328) supplied with the positive fixed voltage rail from the PSU (output is 40V so I use reference voltage zener and resistor), and the negative from the common negative supply line?
Looking at the spec sheet it seems ok but I want to make sure from this forum. i will not use the voltage measurement feature of the chip.
Thank you.
Can I place its shunt resistor in the negative supply line yet connect it to a controller (Atmega328) supplied with the positive fixed voltage rail from the PSU (output is 40V so I use reference voltage zener and resistor), and the negative from the common negative supply line?
Looking at the spec sheet it seems ok but I want to make sure from this forum. i will not use the voltage measurement feature of the chip.
Thank you.