Outline 

When the S pole of magnet faces the mark surface of the sensor and is closed to sensor（B≥Bop），the  sensor outputs low level; When the N pole faces the mark surface and is closed to sensor （B≤Brp），the  sensor outputs high level. When the magnet is far away with the sensor (B=0), the output status of the sensor  is latched and keeps constant. In order to change the output status, the applied magnetic field must be  opposite polarity. The magnet and electric transfer characteristic curve of AH513 is shown as the figure:

Block Diagram

Hall sensor AH513 is one of bipolar excitation single-ended digital output Hall IC. The  output signal owns latch function. The sensor chip has built-in reverse voltage protection,  voltage regulators, temperature compensation circuit, Hall-voltage generator, signal amplifier,  Schmitt trigger and open collector output drives circuit unit. Excellent voltage regulator and  temperature compensation circuit ensure the sensor stable operates over a wide voltage range  and temperature range, and the reverse voltage protection circuit avoids the sensor to be  damaged by reverse voltage.