The TMCS1123 is a galvanically isolated Hall-effect current sensor with industry leading isolation and accuracy. An output voltage proportional to the input current is provided with excellent linearity and low drift at all sensitivity options. Precision signal conditioning circuitry with built-in drift compensation is capable of less than 1.75% maximum total error over temperature and lifetime with no system level calibration, or less than 1% maximum total error with a one-time room temperature calibration (including both lifetime and temperature drift). AC or DC input current flows through an internal conductor generating a magnetic field measured by integrated on-chip Hall-effect sensors. Coreless 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 ± 96 A while minimizing power loss and easing thermal dissipation requirements. Insulation capable of withstanding 5000 V_RMS, coupled with minimum 8.1-mm creepage and clearance provide up to 1100-VDC reliable lifetime reinforced working voltage. Integrated shielding enables excellent common-mode rejection and transient immunity. Fixed sensitivity allows the TMCS1123 to operate from a single 3-V to 5.5-V power supply, eliminates ratiometry errors, and improves supply noise rejection.