Shunt-based current sensor provides sub-1% deviation

The ILF’s current measurement is based on Isabellenhütte’s shunt technology. Conventional current sensors from other manufacturers in the same measurement range are largely based on the magnetic principle. Using this method, a current is detected by the magnetic field of a live conductor. Compared to products that use the magnetic principle, shunt-based current measurement results in greater accuracy.

ILF’s relative error amounts to deviation from the measurement value of less than 1% over the entire measurement range. The ILF also ensures high continuous output, outstanding long-term stability and high continuous load and pulse capacity.

The ILF is designed for two different current ranges: ±60 and ± 30A, and is compatible with supply voltages of 3.3 or 5V. The pins of the ILF sensor consist of two load current contacts as well as four signal and supply communication contacts. Isabellenhütte designed the ILF to be a ready-to-use solution consisting of shunt and semiconductor technology in one-chip housing.

“We are comparable to magnetic sensors in terms of price,” says Jens Hartmann, Sales Director, ISAscale, Isabellenhütte. “However, with shunt technology, we measure current according to Ohm’s law. That means we don’t have to rely on a magnetic field, which is prone to interference. Isabellenhütte sensors are therefore much more precise.”

The ILF is available in a compact IC housing with standard SOP20 dimensions, and operates in the temperature range of -40 to +125°C. The current sensor is compatible with any ADC, and the circuit board mounting can be carried out automatically.