FAQ

HG Series : Hall Ellements

HG

[Q0401]
・Which is better when driving HG series hall elements, the constant current drive or constant voltage drive?
A.
・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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[Q0402]
・How should we choose the best one, from the standard type to the ultra-sensitive type?
A.
・As the type is graded up from the standard type to the ultra-sensitive type, both the constant voltage sensitivity and constant current sensitivity increase. Refer to the graphs and table below. However, since the input/output resistance values also increase, it is necessary to be careful of the circuit matching suchas the amplifier rate. The standard type is the best in temperature characteristics of the hall element outputvoltage and unbalanced voltage, and the ultra-sensitive type is the worst.
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