This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Its special input circuitry can accurately measure differential voltages that exceed its own power supply. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting. The unipolar, high-side INA138 draws only 25 uA quiescent current, which permits shunt measurement with minimal error. The device also features a single resistor gain set, allowing convenient adjustment of its output voltage for any value of shunt resistance.
Delivery is from stock.
I keep thinking of how well this IC would work in low-loss solar power installations. I have a friend who uses his computer to monitor up to 50 A loads in his solar system, and he doesn't want to lose a milliwatt in the process. This IC would fill the bill for him. This SOT-packaged chip is tough too. Although the spec sheet rates the INA138 for a maximum differential input voltage of 500 mV, it can withstand up to 2 V without damage.