Current Sensors First To Exploit AMR Technology

ACEINNA’s MCx1101 family of ±5A, ±20A, and ±50A current sensors debut as the first high-accuracy, wide-bandwidth Anisotropic Magneto Resistive (AMR) based current sensors on the market. They are fully integrated, bi-directional current sensors that offer much higher dc accuracy and dynamic range compared with alternative solutions. For example, the ±20A version has a typical accuracy of ±0.6% and are guaranteed to achieve an accuracy of ±2.0% (max) at 85°C.


The sensors also guarantee an offset of ±60 mA, or ±0.3% of FSR (max) over temperature, which means that high accuracy can be achieved over a roughly 10:1 range of currents. This is a roughly 10x improvement in dynamic range vs. leading Hall-sensor-based devices. Signal bandwidth is 1.5 MHz signal bandwidth and isolation is up to 4.8 kV. Output step response time is 0.3 µs and over current detection response time is 0.2us.

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The family includes ±50, ±20, and ±5A ranges, and is offered in both fixed gain (MCA1101) and ratiometric gain (MCR1101) versions. It is packaged in an industry standard SOIC-16 package with a low impedance (0.9 mΩ) current path and is certified by UL/IEC/EN for isolated applications. For additional technical details, checkout the MCA1101 and MCR1101 data sheet.

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