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HAL548UA-E Datasheet(PDF) 4 Page - Micronas |
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HAL548UA-E Datasheet(HTML) 4 Page - Micronas |
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4 / 28 page  HAL54x DATA SHEET 4 Feb. 12, 2009; DSH000023_003EN Micronas Hall-Effect Sensor Family Release Note: Revision bars indicate significant changes to the previous edition. 1. Introduction The HAL 54x 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 out- put transistor. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accord- ingly, the output transistor is switched on or off. In addition to the HAL50x/51x family, the HAL54x fea- tures a power-on and undervoltage reset. The sensors of this family differ in the switching behav- ior 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 robust against mechanical stress effects. The sensors are designed for industrial and automo- tive applications and operate with supply voltages from 4.3 V to 24 V in the ambient temperature range from −40°C up to 150°C. All sensors are available in the SMD-package SOT89B-1 and in the leaded versions TO92UA-1 and TO92UA-2. 1.1. Features – switching offset compensation at typically 62 kHz – operates from 4.3 V to 24 V supply voltage – overvoltage protection at all pins – reverse-voltage protection at VDD-pin – magnetic characteristics are robust against mechanical stress effects – short-circuit protected open-drain output by thermal shut down – operates with static magnetic fields and dynamic magnetic fields up to 10 kHz – constant switching points over a wide supply volt- age range – the decrease of magnetic flux density caused by ris- ing temperature in the sensor system is compen- sated by a built-in negative temperature coefficient of the magnetic characteristics – ideal sensor for applications in extreme automotive and industrial environments – EMC corresponding to ISO 7637 1.2. Family Overview The types differ according to the magnetic flux density values for the magnetic switching points and the tem- perature behavior of the magnetic switching points. 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 out- put does not change if the magnetic field is removed. For changing the output state, the opposite magnetic field polarity must be applied. Unipolar Sensors: The output turns low with the magnetic south pole on the branded side of the package and turns high if the magnetic field is removed. The sensor does not respond to the magnetic north pole on the branded side. Type Switching Behavior Sensitivity see Page 542 latching high 19 543 unipolar low 21 546 unipolar high 23 548 unipolar medium 25 |
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