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The AH1925 is an ultra-low power digital and high sensitivity omnipolar Hall effect switch IC from Diodes Incorporated’s broad Hall Effect switches family. The sensitive device is designed to meet a wide range of potential applications with low power requirements including battery-operated equipment, the average supply current is only 1.4μA at 1.85V. To support portable equipment the AH1925 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The high ESD level up to 8kV helps to improve the system robustness. To minimize PCB space the AH1925 is available in small low profile X2-DFN1410-4 package.
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 operate point (BOP) the output is switched on (pulled low). The output is turned off when B becomes lower than the release point (BRP).