Closed-loop current sensors achieve offset drift down to 3ppm/°C

Based on LEM’s custom proprietary Hall-effect ASIC, the LxSR series sensors offer low offset drift of 3 to 14ppm/°C, combined with high levels of design flexibility. All families provide options for an integrated voltage reference, an aperture and/or integrated primary conductors and fast over-current detection. Designed for nominal currents from 1.5 to 50 A, the LxSR series operates over a temperature range from -40 to +105°C.

The families achieve LEM’s benchmark performance through a patented arrangement of multiple Hall cells in addition to sophisticated offset cancelling techniques. Each sensor is individually calibrated and sensitivity adjustments are stored in the ASIC’s One-Time-Programmable memory. This memory is also used to store a unique ID to provide full traceability of each ASIC.

LEM’s next-generation LxSR current sensors are available now for sampling and production.