The TMCS1170 is a Hall-effect current sensor, featuring 100V functional isolation, ambient field rejection and high current carrying capability in a small 3mm × 3mm QFN package. 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 0.6mΩ resistance at room temperature and accommodates up to 30A_RMS continuous current at 125°C ambient temperature when used with printed circuit boards of comparable thermal design as the TMCS1170EVM. 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 285kHz. There are multiple fixed-sensitivity device options to select from, providing a wide variety of bidirectional linear current sensing ranges from ±10A to ±50A, as well as unidirectional linear current sensing range up to 50A. The TMCS1170 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.