TMR 3-axis magnetometer sensitive to 10nT/LSB

January 10, 2018 // By Julien Happich
TDK Corporation and Asahi Kasei Microdevices Corporation have jointly developed a highly accurate 3-axis magnetometer that combines an extremely sensitive tunnel magneto-resistive (TMR) element developed by TDK and an advanced electronic compass ASIC designed by AKM.

The new TMR magnetometer on a chip, measuring just 1.6x1.6x0.6mm, features the industry’s lowest RMS noise of just 40nT-rms and a very low current consumption of only 40µA at an output data rate of 100Hz.

Thanks to its high sensitivity of 10 nT/Least Significant Bit (LSB), the magnetic sensor can detect minute changes in magnetic fields very precisely, enabling the highly accurate detection of both position and orientation with the help of the Earth’s magnetic field or a magnetic field generator. These unique characteristics make the TMR magnetometer suitable for compact electronic devices such as smartphones, tablets, game console controllers and all kinds of wearable devices, as well as other applications that demand high position and orientation precision such as virtual, augmented or mixed reality (VR, AR, and MR) or indoor navigation.