Other Parts Discussed in Thread: INA301
I have read several questions posted regarding low current "delay" or compression. (Is there a correct name for this behavior?) I have observed the same behavior with an inductive load.
If you can see the terrible scope picture below, the pink line is a Tektronix current probe, and the washed-out blue line is the output from the INA301. There is a 300 uS delay, and then the output jumps to about 60 mV. I do not understand why it behaves this way. If I connect a resistive load, it delays about 10 uS and rises quicklly. I'm using a 50 mOhm Kelvin shunt.
My real question is this: Is this behavior inherent to all / most of the current sensing amplifiers? I'm just curious if this is something I can avoid by selecting a different device, or if this is just the nature of current sense amps. I use these with common modes of up to 24V, usually automotive or industrial engine applications. Current rise from 0 to 1.5 A is in the 15 mS range - quite slow.
Thank for your time and efforts.