News Release

- New Product Information -

AKM releases ultra-low noise current sensor for audio system

Product Name
AK3101 / AK3102 / AK3103 / AK310H
Product Category:
Current Sensors > Ultra-low Noise Coreless Current Sensor
Ultra-low Noise Coreless Current Sensor
Audio Systems, Industrial Motors


AKM has developed ultra-low noise coreless current sensors for improving audio quality of large sized speakers such as subwoofers.  The AK310x series is suitable for a system which controls voicecoil motion in speakers (Motional Feedback) by current feedback.  This series can be used for controlling industrial motors, since it is certified to UL safety standards.


● Achieving Ultra-Low Noise

Although conventional current sensors had large noise, the AK310x series reduces the noise extremely to combine with a signal processing IC and an ultra-high sensitivity Hall element.  It achieves the world’s best noise performance of -108dBm/√Hz. *

* According to AKM’s research as of the date of releasing this product.

● Ultra-Low Impedance

The dumping factor of the speaker is almost unaffected because the AK310x series can measure the current with a 1.6mΩ impedance.  This series is suitable for motional feedback system.

● Ultra-small Package Certified to Safety Standard

The AK310x series adopts an ultra-small coreless package, (D/W/H: 7.6 × 7.9 × 1.15mm).
It is certified to IEC/UL60950 and planned to be certified to IEC/UL1577, suitable for various industrial applications such as AC motors and general-purpose inverters.

Main Specifications of the AK310x series

Product NameLinear Sensing Range
Output Noise
Response Time
AK3101 ±10.7 195 -102 2
AK3102 ±21 100 -108 2
AK3103 ±35 60 -108 2
AK310H ±42 50 -108 2
* Information on this page is current on the date of press release.
* AKM is a trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
* Currentier is a trademark of Asahi Kasei Microdevices Corporation (under registration review).

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