An application require me to sense current form several instructors to regulate current inside this coils. In this application I'll drive this coil with 30Khz Freq and a variable Duty cycle, voltages on coils goes up to 50V and H-bridge is applied. A bi-directional current amplifier is required.
Several coils create me a price constrain and also, most possible circuitry simplification.
An ideal should be a current sense amplifier with digital output, but prices are too high for a single channel. Otherwise an In-Line application with dedicated ADC will low price.
I've found INA240 but looking for something cheaper or multichannel.
My first question is:
INA240 is suitable at this drive frequencies?
Alternatives to INA240 that I may consider?
