CT450 XtremeSense® TMR Sensor

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1 MHz Bandwidth Contactless Current Sensor with <1% Total Error

The CT450 is a high bandwidth and low noise integrated contactless current sensor that uses Crocus Technology’s patented XtremeSense TMR technology to enable high accuracy current measurements for many consumer, enterprise, and industrial applications. It supports eight (8) field ranges where the CT450 senses and translates the magnetic field into a linear analog output voltage. It achieves a total error output of less than 1.0% over voltage and temperature.

It has less than 1.0 µs output response time while the current consumption is about 5.0 mA. The CT450 is equipped with over-field detection (OFD) circuitry to identify out of range fields. It has a fault-bar (FLT) pin such that if over-field faults occur, then an active LOW digital signal will be activated by the CT450 to alert the microcontroller that a fault condition has occurred.

The CT450 is a very low profile, industry standard 8-lead TSSOP package that is “green” and RoHS compliant.


  • Integrated Contactless Current/Field Sensing Ranges:
    • 0 mT to +8 mT
    • -8 mT to +8 mT
    • 0 mT to +12 mT
    • -12 mT to +12 mT
    • 0 mT to +20 mT
    • -20 mT to +20 mT
  • Linear Analog Output Voltage
  • Total Error Output: < ±1.0%, -40°C to +125°C
  • 1 MHz Bandwidth
  • Response Time < 1.0 µs
  • Reference Voltage Output for Unipolar/Bipolar Field Measurements
  • VOUT – VREF < 1.0% (Typical)
  • Low Noise Performance
    • Detects Out of Range Fields
  • 8-lead TSSOP Package


  • CT450 Data Sheet



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