Hall Effect Sensor Output Voltage

V out max v q output v b mt b sat b sat v out min figure 3.

Hall effect sensor output voltage.

Set one input of the comparator to a reference level of say 350 mv. When the magnetic flux density around the sensor exceeds a certain pre set threshold the sensor detects it and generates an output voltage called the hall voltage v h. The hall sensor output feeds into the other input of the comparator. A hall effect sensor or simply hall sensor is a device to measure the magnitude of a magnetic field its output voltage is directly proportional to the magnetic field strength through it.

25ma 15vdc 0 5 25 c 85 c. Hall effect sensor principles. Hall effect sensors are used for proximity sensing positioning speed detection and current sensing applications. B field response of the drv5053 when no magnet is present b 0 the output.

With a lab scope a 2 wire hall effect abs sensor signal voltage is measured with the wheel turned by hand. The output signal from a hall effect sensor is the function of magnetic field density around the device. To help determining whether the 2 wire hall effect abs sensor is functioning correctly different deviations from the example signal are mentioned along with possible causes. The output of the comparator can drive the led with suitable series resistor.

Frequently a hall sensor is combined with threshold detection so that it acts as and is. Many automotive hall effect sensors have a built in internal npn transistor with an open collector and grounded emitter meaning that rather than a voltage being produced at the hall sensor signal output wire the transistor is turned on providing a circuit to ground through the signal output wire. The signal from the sensor is shown and can be downloaded. Consider the diagram below.

What the comparator will be showing is if the hall sensor voltage is above or below the reference voltage.