Hall Effect ICs
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[Q0405] ・Which output is present at power on, H or L?
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A. ・When the magnetic flux density is Bop or higher, it is L. When it is Brp or lower, it is H. When it is between Bop and Brp, it varies.
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[Q0406] ・How fast the response speed (the duration from the magnetic flux density exceeds Bop to the time when the output changes) is?
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A. ・It depends on the grade, but roughly estimated, it is 5 μs or less.
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[Q0691] ・Is a protection circuit necessary?
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A. ・The EW series and EZ series Hall ICs do not implement built-in protection circuits for overvoltage or overcurrent. It is recommended to consider adding external protection circuits as needed. Below are some reference examples: If there is a risk of overvoltage or overcurrent at the output terminal, we recommend using a Zener diode for overvoltage protection and a current-limiting resistor for overcurrent protection. (Figure 1) If there is a risk of reverse connection or overvoltage at the power supply terminal, we recommend using a reverse-protection diode and a Zener diode for protection. (Figure 2)
Figure 1. Countermeasures for Electrical Overstress around Output Terminals 
Figure 2. Countermeasures for Electrical Overstress around Power Supply Terminals Was it helpful?YesNoThank you We will reflect your opinion on the improvement of the web content.