High-efficiency current sensing requires low resistance values. Values less than 1 milliohm can be difficult to find and typically have high TCR. Stackpole Electronics has added a 0.2 milliohm resistance value to its CSNL2512-3W series. The device handles 3W of power while providing TCR from ±50ppm for a 1 and 2 milliohm to ±175ppm for the new 0.2 milliohm value.
