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Part no. | Magnet. Charac. Bon – [mT] | Magnet. Charac.Boff – [mT] | 2-Wire | 3-Wire | 4-Wire | TO92 | SOT23 | SOT89 | Details |
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HAL1002 |
Programmable | Programmable | x | x |
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HAL1501 |
0.5 | –0.5 | x | x |
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HAL1502 |
2.5 | –2.5 | x | x |
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HAL1503 |
5.5 | 3.5 | x | x |
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HAL1506 |
18 | 16 | x | x |
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HAL1507 |
27 | 23 | x | x |
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HAL1508 |
–5.5 | –3.5 | x | x |
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HAL1509 |
3.5 | 5.5 | x | x |
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HAL1562 |
12 | –12 | x | x |
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HAL1563 |
7 | 9 | x | x |
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The simplest application is to use the sensor as a “magnetic” switch. The magnetic field strength his measured and compared with a fixed threshold level predefined or programmable in the sensor. As soon as this value is exceeded (switching point) the switching state at the output of the sensor changes and the output transistor is switched on or off. Two types of switches are available. The switch type changes his output state as soon as the threshold value of the magnetic field is exceeded and returns back to the initial state after the magnetic field has decreased under a certain release field strength. The difference between the switching field and the release field is called hysteresis. The latching types change their output state if a south pole is approached. If the south pole is removed, the output state remains stable until a north pole is approached. Then, the sensor returns to the initial state.
The 3-wire versions have an open-drain-output and for 2-wire versions the output signal is current coded.
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