Crocus Technology CT45X Current Sensor

Crocus Technology’s CT45x isolated contactless current sensors simplify the high precision & high current application by eliminating costly concentrators or complex mechanical mounting. A contactless TMR current sensor enables high precision AC and DC current sensing without the need of a concentrator core or shield.  It can sense the magnetic field from 8 mT to 20 mT of current flowing through a PCB trace or larger bus bar. The high-speed operation and accurate output allow customers to optimize system design for smaller size and higher efficiency.

These coreless devices utilize Crocus’ state-of-the-art XtremeSense® TMR technology to detect extremely small variations in AC or DC currents while achieving an unprecedented total output error of less than 1.0% over the full temperature range. In addition, CT450 is equipped with over field detection (ODF) circuitry to identify out of range field. The CT450 offers market leading noise performance, as low as 0.55 mVRMS, to enable applications to sense small current levels and minute changes or variation in current through a busbar.  This achieves an SNR (signal-to-noise ratio) as high as 77 dB for the CT45x output analog signal, which allows the system to process higher resolution data, and deliver higher accuracy current measurements.