Other Parts Discussed in Thread: INA181
Hello.
I used the INA181-Q1 for the current monitor of the battery in automotive production.(Max current :3.87A )
As the datasheet description :The input circuitry of the INAx181-Q1 accurately measures beyond the power-supply voltage, VS. For example,
VS can be 5 V, whereas the bus supply voltage at IN+ and IN– can be as high as 26 V. However, the output
voltage range of the OUT pin is limited by the voltages on the VS pin. The INAx181-Q1 also withstand the full
differential input signal range up to 26 V at the IN+ and IN– input pins, regardless of whether or not the device
has power applied at the VS pin.
if we want to protect the INA181 when have transients more than 26v ,
1.so we how to modify this Sch?
2.According the datasheet(page 31), if we will follow this transient protection using dual zener diodes,
could you propose the part number of the zener diodes for me?
3.According our design the Sch, If we want to change the R342/R343 to bigger avoid the bigger current to damage the resistors,
but change the resistors to bigger can impact on the measurement of the current accuracy, right?
so could you give me some suggestions ?
B,R
hejun