FAQ

HW / HS Series : Hall Ellements

HW / HS

[Q0396]
・For the surface mounting DIP type HW series, where is No.1 pin?
A.
・Because the hall element can maintain characteristics within the specified range even if it turns by 180°, the upper right pin is No. 1 pin for the surface mounting type and the upper left pin is No. 1 pin for the DIP type.
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[Q0397]
・How should we specify the sensitivity rank when ordering HW series hall elements?
A.
・Specify the sensitivity rank 3 or above for the design using ultra-sensitive type HW series hall elements.
Ex) ABC, BCD, CDE, EFG ranks
Highly sensitive types HW-105C and HW-108C have the sensitivity rank QR only, and HS-0111 has no sensitivity rank.
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[Q0398]
・How should we determine the value of the limiting resistor.
A.
・The resistor values of HW series and HS series hall elements drop quickly at high temperature. Therefore, they are easily subject to burnout and care should be taken of the drive circuit. In general, a resistor is added in series with the hall element to prevent burnout. Click here to see how to determine the resistor value.
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[Q0399]
・Can we use it without the limiting resistor?
A.
・Yes, you can. However, the voltage and current are considerably reduced compared with those with limiting resistors. Click here for the details.
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[Q0400]
・What is the difference between the ultra-sensitive type and highly sensitive high linearity type?
A.
・The ultra-sensitive type has a magnetic core inside of it, so the output becomes higher at low magnetic field, but when the magnetic core reaches magnetic saturation, the tilting direction changes and the output voltage is not proportional to the magnetic flux density. (Refer to the figures below.) Therefore, this type is not suitable for the measurement of the magnetic flux density, then used to detect presence of the magnet.
Because the highly sensitive high linearity type has no magnet core inside of it, it can obtain the linear output characteristics in wide range. For your information, when requiring the linearity, use it in the constant current drive. The constant voltage drive is affected by the magnetic resistance effect, so it is not proportional to the magnetic flux density.
fig
fig
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