LSM303AGR Datasheet, PDF (35/68 Pages) STMicroelectronics – ultra-low-power 3D accelerometer and 3D magnetometer

LSM303AGR
Application hints
5.2
High-current wiring effects
High current in wiring and printed circuit traces can be culprits in causing errors in magnetic
field measurements for compassing.
Conductor-generated magnetic fields will add to the Earth’s magnetic field, leading to errors
in compass heading computation.
Keep currents higher than 10 mA a few millimeters away from the sensor IC.
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