HAL502

PRODUCT INFORMATION HAL 5xy Sept/2006 HAL 5xy Multipurpose Hall-Effect Sensor Family The HAL 5xy family consists of different Hall switches produced in CMOS technology. All sensors include a temperaturecompensated Hall plate with active offset compensation, a comparator, and an opendrain output transistor. The comparator compares the actual magnetic 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 magnetic characteristics over supply voltage and temperature range. In addition, the magnetic parameters are robust 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 the SMD-package SOT89B-1 and in the leaded versions TO92UA-1 and TO92UA-2. Features Major Applications The HAL 5xy is the optimal system solution for applications, such as: V V V V V V V V V 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 regarding 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 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 magnetic characteristics Ideal sensor for applications in extreme automotive and industrial environments EMC corresponding to ISO 7637 Operates from −40 °C to 170 °C junction temperature V V V V V Endposition detection RPM measurement of motors in various applications, such as power window Brushless DC motors RPM measurements in flow meters Replacement of micro switches V V V PRODUCT INFORMATION HAL 5xy Available Types and Switching Behavior Sept/2006 Features Switching Behavior HAL 501 bipolar HAL 502 latching HAL 503 latching HAL 504 unipolar HAL 505 latching HAL 506 unipolar HAL 508 unipolar HAL 509 unipolar HAL 516 unipolar with inverted output HAL 519 unipolar with inverted output (north polarity) high HAL 523 unipolar Sensitivity very high high medium medium low high medium low high low System Architecture The HAL 5xy sensors are monolithic integrated circuits which switch in response to magnetic fields. If a magnetic field with flux lines perpendicular to the sensitive area is applied to the sensor, the biased Hall plate forces a Hall voltage proportional to this field. The Hall voltage is compared with the actual threshold level in the comparator. The temperature-dependent bias increases the supply voltage of the Hall plates and adjusts the switching points to the decreasing induction of magnets at higher temperatures. If the magnetic field exceeds the threshold levels, the open drain output switches to the appropriate state. The builtin hysteresis eliminates oscillation and provides switching behavior of the output without bouncing. HAL 5xy VDD 1 Reverse Voltage & Overvoltage Protection Temperature Dependent Bias Hysteresis Control Short Circuit & Overvoltage Protection Hall Plate Switch Comparator Output OUT 3 Clock GND 2 Fig. 1: Block diagram of the HAL 5xy All information and data contained in this product information are without any commitment, are not to be considered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or development sample availability and delivery are exclusively subject to our respective order confirmation form. By this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third parties which may result from its use. No part of this publication may be reproduced, photocopied, stored on a retrieval system, or transmitted without the express written consent of Micronas GmbH. Edition Sept. 26, 2006; Order No. 6251-712-1PI Micronas GmbH ⋅ Hans-Bunte-Strasse 19 ⋅ D-79108 Freiburg (Germany) ⋅ P.O. Box 840 ⋅ D-79008 Freiburg (Germany) Tel. +49-761-517-0 ⋅ Fax +49-761-517-2174 ⋅ E-mail: docservice@micronas.com ⋅ www.micronas.com