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HAL504A Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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HAL504A Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
3 / 44 page HAL5xx 3 Micronas Hall Effect Sensor Family in CMOS technology Release Notes: Revision bars indicate significant changes to the previous edition. 1. Introduction The HAL5xx family consists of different Hall switches produced in CMOS technology. All sensors include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain output transistor. The comparator compares the actual mag- netic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accordingly, the output transistor is switched on or off. The sensors of this family differ in the switching behavior and the switching points. The active offset compensation leads to constant mag- netic characteristics over supply voltage and tempera- ture range. In addition, the magnetic parameters are ro- bust against mechanical stress effects. The sensors are designed for industrial and automotive applications and operate with supply voltages from 3.8 V to 24 V in the ambient temperature range from –40 °C up to 150 °C. All sensors are available in a SMD-package (SOT-89B) and in a leaded version (TO-92UA). 1.1. Features: – switching offset compensation at typically 62 kHz – operates from 3.8 V to 24 V supply voltage – overvoltage protection at all pins – reverse-voltage protection at VDD-pin – magnetic characteristics are robust against mechani- cal stress effects – short-circuit protected open-drain output by thermal shut down – operates with static magnetic fields and dynamic mag- netic fields up to 10 kHz – constant switching points over a wide supply voltage range – the decrease of magnetic flux density caused by rising temperature in the sensor system is compensated by a built-in negative temperature coefficient of the mag- netic characteristics – ideal sensor for applications in extreme automotive and industrial environments – EMC corresponding to DIN 40839 1.2. Family Overview The types differ according to the magnetic flux density values for the magnetic switching points, the tempera- ture behavior of the magnetic switching points, and the mode of switching. Type Switching Behavior Sensitivity see Page 501 bipolar very high 14 502 latching high 16 503 latching medium 18 504 unipolar medium 20 505 latching low 22 506 unipolar high 24 508 unipolar medium 26 509 unipolar low 28 516 unipolar with inverted output high 30 517 unipolar with inverted output medium 32 518 unipolar with inverted output medium 34 519 unipolar with inverted output (north polarity) high 36 523 unipolar low 38 Latching Sensors: The output turns low with the magnetic south pole on the branded side of the package and turns high with the magnetic north pole on the branded side. The output does not change if the magnetic field is removed. For changing the output state, the opposite magnetic field polarity must be applied. Bipolar Switching Sensors: The output turns low with the magnetic south pole on the branded side of the package and turns high with the magnetic north pole on the branded side. The output state is not defined for all sensors if the magnetic field is removed again. Some sensors will change the output state and some sensors will not. |
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