XtremeSense® TMR Sensor

500 kHz, High Precision XtremeSense® TMR
Isolated Current Sensor in SOIC-8 Package

The CT402x is a highly linear, XtremeSense® TMR based Current Sensor. The TMR sensor is differential which enables common-mode field rejection to cancel out stray magnetic fields. The primary conductor is only 0.5 mOhm which enables the sensor to withstand high in-rush current and minimize power loss. The current applied to the pin of the primary conductor generates an internal differential magnetic field. The TMR sensor provides a proportional voltage to the differential magnetic field while rejecting common-mode stray magnetic fields.

The pins of the primary conductive path and the sensor leads are galvanically isolated. This enables high-side current sensing without the need for additional isolation techniques. 

The CT402x family is offered in an industry standard 8-lead SOIC package that is “green” and RoHS compliant.

Product features and performance​

  • DC to 500kHz Bandwidth
  • Integrated 0.5 mΩ Conductor
  • Total Error Output: ±1% (typ.)
  • 700 ns Response Time
  • Immunity to Common Mode Field: -40 dB
  • UL/IEC 62368-1 and UL1577 Certification
  • IEC 61000-4-5 Certified
  • 3.3V and 5V Supply Voltage
  • 10nF Capacitive Drive Capability
  • Ratiometric Output Voltage

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