This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

current, voltage sensing

Other Parts Discussed in Thread: INA250-Q1, INA260

Hi~

Customer developing automotive battery voltage and current sensing solution.

For current sensing, consider INA250-Q1 which integrated current sensing resistor,

BTW, is there any good device for voltage monitoring? As well know, automotive input range is 8~18V so need to read exact value of that range.

First, I proposed with resistor divider + opamp solution, but customer looking for more robust and convenient solution like one chip base.

Any advice would be welcome.

  • Hello Jin-Suk Choi,

    If you are looking for a current sensing solution with an integrated shunt, then the INA250-Q1 is the right choice. However, if you simply need an automotive part that can handle an 8 to 18V common mode input, then there are many more options. If you do not absolutely need a automotive qualified solution, then you might consider the INA260, as it can monitor current and voltage. However, there is no automotive qualified version of this part at this time.

    As for a voltage monitoring solution, what we would propose is exactly what you proposed, using an op amp in a gain-reducing configuration to divide the voltage down to a usable range.

    Our devices are current monitors, which can be used as voltage monitors if the shunt resistor is in series with a known fixed load resistor. Whatever voltage difference that is seen across the shunt will then be input to an internal amplifier, which will then produce an output current or voltage proportional to the what the input voltage is.  Kind of a roundabout way to get there, but possible.