News Release

- New Product Information -

2017/01/06 (updated 2017/04/04)
AKM releases a 3-axis Magnetic Sensor for IoT Designs; the AK09970 captures Magnetic Fields with Vector Components

Product Name
Product Categories : 3-axis Magnetic Sensor
3-axis Magnetic Sensor IC with Digital Output
IoT, Security Applications, (Door, Window open/close detection), Monitoring Applications for Factory Equipment, etc.
3-axis Magnetic Sensor


There is increasing demand for a sensing function to monitor an object’s status in remote locations as IoT products are expected to grow in the market.
Asahi Kasei Microdevices Corporation, (AKM), has developed the AK09970, a 3-axis magnetic sensor that is able to detect magnetic signals in X, Y, and, Z directions. The AK09970 supports wide measurement range with high resolution in 3-axis detection and captures magnetic fields in 3-dimensions. With these abilities, it is great device for controlling the direction of security cameras and connected home, (smart home, smart house), smart locks, along with door and window open/close detection.

Samples are available now, with mass-production of the AK099770 in summer 2017.

● High Sensitivity Setting / Wide Range Setting

The AK09970 has a high sensitivity setting of ±36mT on 3-axes.
It is able to measure a wide range of magnetic field from microtesla to millitesla such as from geomagnetic to a magnet since it has high measurement resolution of 1.1µT/LSB in high sensitivity mode.
In addition, wide range setting of 101mT can be achieved via the Z axis.(Refer to the Specification Table)

● Low-power Consumption when Battery Life is Critical

The AK09970 can operate using only a few µA, thus consuming a very low current that satisfies a demand of IoT products, (Refer to the Specification Table). It contributes to a long battery life of a product that needs constant acquisition of sensor data to monitor an object’s status.

● Magnetic Field Output (Digital)/ Data Ready Alert (DRDY bit)

The AK09970 measures magnetic field on all 3-axes via intermittent drive and outputs the result as digital data, (supporting I2C/SPI communications). It outputs a Data Ready Alert to the dedicated register when the measurement data is updated. (0.25/0.5/1/10/20/15/100Hz interval modes or single measurement mode is selectable for intermittent drive options.)

● Magnetic Event Interrupt Function

The AK09970 has magnetic event interrupt pins. Two thresholds can be programmed for each axis, (setting the resolution equal to the measuring resolution). When a magnetic field that exceeds the threshold is sent, the AK09970 outputs a “Magnetic Event” interrupt to registers or external output pins. The magnetic event that causes an interrupt output that can be selected freely by setting a register. (Data Ready Alert mentioned in above can also be output from an interrupt pin). Two interrupt pins are available for magnetic event: the INT pin for push-pull output and the ODIN pin for open-drain output. Therefore, the output format can be selected depending on the customer’s product.


3-axis Magnetic Sensor with Digital Output
Range Setting*
High sensitivity settingWide range setting
Magnetic sensitivity1.1µT/LSB3.1µT/LSB
Measurement rangeX,Y,Z ±36mTX,Y ±35mT,
Z ±101mT
Power Setting*
Low power driveLow noise drive
Idd average0.6µA@1Hz
Output bit16-bit
Output pinInterrupt pin (CMOS/Open Drain)
Power supply1.7 to 3.6V
16-pin QFN (3.0×3.0×0.75 mm)
Status2017/07 MP

[Notes] * Selectable

* Information on this page is current on the date of press release.
* AKM is trademark of Asahi Kasei Microdevices Corporation in Japan, Europe and the United States.
* Appellations, company names and product names on this page are trademarks or registered trademarks of respective companies.

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