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AH1815灵敏度低功耗全极性霍尔效应开关
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The AH1815 is a low-sensitivity， micro-power Omnipolar Hall effect switch IC， designed for portable and battery powered consumer equipment for home appliance and industrial applications such as smart-meter magnetic-tamper detection. Based on two sensitive Hall effect plates and a chopper-stabilized architecture， the AH1815 provides a reliable solution over the whole operating range. To support portable and battery powered equipment， the design has been optimized to operate over the supply range of 2.5V to 5.5V and consumes only 24µW with a supply of 3V. The single open drain output can switch on with either a north or south pole of sufficient strength. When the magnetic flux density （B） perpendicular to the package is larger than operating point （Bop） the output is switched on （pulled low）。 The output is turned off when B becomes lower than the releasing point （Brp）。 The output will remain off when there is no magnetic field.
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