The TMCS1123 is a precision Hall-effect current sensor, featuring up to 1.3kV reinforced isolation working voltage, ambient field rejection and high current carrying capability. Maximum total lifetime error less than 1.4% can be achieved with no system level calibration, or less than 1% maximum total error can be achieved with a one-time room temperature calibration (including both temperature and lifetime drift). Numerous device options are provided for both unidirectional and bidirectional current measurements. Input current flows through a conductor between the isolated input current pins. The conductor has a 0.7mΩ resistance at room temperature and accommodates up to 44A_RMS continuous current at 125°C ambient temperature when used with printed circuit boards of comparable thermal design as the TMCS1123xEVM. The low-ohmic leadframe path reduces power dissipation compared to alternative current measurement methodologies, and does not require any external passive components, isolated supplies, or control signals on the high-voltage side. The magnetic field generated by the input current is sensed by a Hall sensor and amplified by a precision signal chain. The device can be used for both AC and DC current measurements and has a bandwidth of 250kHz. There are multiple fixed-sensitivity device options to choose from, providing a wide variety of bidirectional linear current sensing ranges from ±10A to ±96A, as well as unidirectional linear current sensing ranges from 19A to 183A. The TMCS1123 can operate with a low voltage supply ranging from 3V to 5.5V, and is optimized for high accuracy and temperature stability, with both offset and sensitivity compensated across the entire operating temperature range.