1 MHz Differential Current Sensor with CMFR Optimized for Motor Control

The CT456 is a high-bandwidth and low-noise integrated zero-loss contactless current sensor that uses Allegro patented XtremeSense tunnel magnetoresistance (TMR) technology to enable high-accuracy current measurements for many consumer, enterprise, and industrial applications. The device supports a preprogrammed 6mT field range where the CT456 senses and translates the magnetic field into a linear analog output voltage.

This coreless current sensor is not only small in size and simple to incorporate into a design, but it also provides effective common-mode rejection. Thanks to its differential measurement, the CT456 have greater than 90% immunity to stray magnetic fields, which thus have almost no impact on the accuracy of the current measurement.

The CT456 is assembled in a low-profile, industry-standard eight-lead thin-shrink small-outline package (TSSOP) that is green and RoHS compliant.