Conventional tri-axis magnetic sensors have been used for position tracking applications. However, there are cases when sufficient performance is not possible due to magnetic field noise. World class ultra-low noise tri-axis sensing from the AK09940 resolves this problem, increasing magnetic position tracking accuracy for AR and VR.

The AK09940 is ideal for magnetic particle testing and metal contamination detection with triaxial magnetic measuring, which measures wet field, small changes, and distortion in magnetic-fields with high precision. In addition, the AK09940 has very low power consumption current suitable for triaxial measurement in wearable and IoT devices with small batteries.

The AK09940 allows for measurement of minute magnetic signals with ultra-low noise (40nT RMS) in the X, Y, and Z axes that are normally drowned out by noise.

Magnetic position tracking used in controllers such as AR and VR devices has the advantage that it can be detected even if the sensor is hidden behind objects. However, due to signal noise on the receiving side, sufficient performance ordinarily may not be obtained in terms of detection range, position accuracy, and response speed. This problem is solved with the ultra-low noise tri-axis magnetic sensor on the receiving side.

An ultra-low current consumption of 40nA @ 100Hz makes it ideal for devices using small-capacity batteries.

The AK09940 is housed in a small LGA 1.6 x 1.6mm package.

Augmented Reality/Virtual Reality (AR/VR) Devices, Wearable Devices, Magnetic Metal Particle Testers, Magnetic Mapping

• Analog Power Supply VDD: +1.7V to +1.98 [V]
• Digital Power Supply VID: +1.65V to VDD [V]
• Interface: I2C & 4-wire SPI
• Current Consumption (@100Hz ODR) (Power Mode): 30, 60, 100, 200 [ μA (typ.) ]
• Noise (Power Mode): 70, 60, 50, 40 [ nT-rms (typ.) ]
• Sensitivity: 10 [nT/LSB]
• Measurement Range: ±1200 [μT]
• Output Bit: 18 [bit]
• Package Size: 1.6 x 1.6 x 0.6 [mm]