Allegro MicroSystems Inc. Isolated, 500kHz TMR Current Sensor in 1 mΩ SOIC-8 or SOICW-16 Package CT4022-A12BSN8

The CT4022-A12BSN8 is a tunneling magnetoresistive (TMR) current sensor with a ±12 A current sensing range, housed in an SOIC-8 package. It operates with a 3.3 V or 5 V supply, provides a ratiometric analog output, and features a 1 mΩ primary conductor resistance for low power dissipation and high inrush current capability. The device offers 500 kHz bandwidth, common-mode field rejection, and operates from -40°C to 125°C. It is AEC-Q100 Grade 1 qualified and certified to UL 62368-1 (edition 3) with 3500 V RMS isolation, 5000 V impulse withstand, and 4 mm creepage and clearance. The output is bidirectional with a quiescent output voltage of 1.65 V at 3.3 V supply and 110 mV/A sensitivity.