CT453 XtremeSense® TMR Contactless Current Sensors Allegro MicroSystems CT453 XtremeSense® TMR Contactless Current Sensors combine high bandwidth and low noise utilizing Allegro MicroSystems’s patented XtremeSense TMR technology. The CT453 provides high-accuracy current measurements for many consumer, enterprise, and industrial applications. The CT453 supports six field ranges where the device senses and translates the magnetic field into a linear analog output voltage. The CT453 delivers a total error output of less than ±1.0% over voltage and temperature. The coreless current sensors supply an effective common mode rejection of more than -50dB in a small package that is simple to design.