TMCS1170

The TMCS1170 is a galvanically isolated Hall-effect current sensor with 100V functional isolation in a small QFN package. An output voltage proportional to the input current is provided with excellent linearity and low drift at all sensitivity options. Signal conditioning circuitry with built-in drift compensation is capable of less than 2.85% maximum sensitivity error over temperature with less than 3% lifetime shift with no system level calibration.

AC or DC input current flows through an internal conductor generating a magnetic field measured by integrated on-chip Hall-effect sensors. Core-less construction eliminates the need for magnetic concentrators. Differential Hall sensors reject interference from stray external magnetic fields. Low conductor resistance increases measurable current ranges up to ±60A while minimizing power loss and easing thermal dissipation requirements. Integrated shielding enables excellent common-mode rejection and transient immunity.

Fixed sensitivity allows the device to operate from a single 3V to 5.5V power supply, eliminating ratiometry errors and improving supply noise rejection. The small solution size, current capability, and ambient field rejection make the device an ideal solution for monitoring currents in tight spaces.