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Three Spin Dependent Tunneling (SDT) magnetic field sensors were used as transducers to build a 3-axis magnetometer. For usage in low frequency applications like vehicle detection, security, and unattended ground sensor, this magnetometer was created (UGS).
As a result, emphasis has been placed on low cost, small size, and high power. The current version employs a common software interface, is ready for prototype sampling, and is smaller than earlier versions. The size, power, and noise floor of the SDT 3-axis magnetometer, among other characteristics, are discussed in this work.
Starting with the complete board, moving on to the magnetic transduction circuit architecture, and finally the SDT transducers themselves, the magnetometer’s design and operation will be discussed in decreasing order of complexity.
Compared to earlier iterations, the current 3-axis magnetometer board is significantly smaller. The communications circuitry’s reduced complexity is largely to blame for this.
The global 3-axis magnetometer market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
In a very compact package, TDK Corporation’s and Asahi Kasei Microdevices Corporation’s (AKM) highly accurate 3-axis magnetometer combines an incredibly sensitive tunnel magneto-resistive (TMR) element with an advanced electronic compass ASIC.
With tiny dimensions of just 1.6 mm x 1.6 mm x 0.6 mm, the new TMR magnetometer on a chip boasts the lowest RMS noise in the industry of just 40 nT-rms and extremely low current consumption of only 40 A at an output data rate of 100 Hz.
The series magnetometer is housed in an incredibly compact BGA package along with a monolithic 3-axis AMR sensor and a signal conditioning ASIC.
