The temperature coefficient of the hall element output voltage is approx. -0.2% per°C for the constant voltage drive, and approx. -0.02% to -0.08% per °C for the constant current drive. As you see, the constant current drive has better coefficient, therefore basically use in the constant current drive. In addition, the constant current drive can ignore the magnetic resistance effect and has better linearity against the magnetic flux density at high magnetic field. The linearity of 2% or lower defined in the specifications is achieved by the constant current drive.

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