HAL109

PRODUCT INFORMATION HAL 1xy April/2009 HAL® 1xy Low-Cost Hall-Effect Sensor Family The HAL 1xy Hall switch family is designed for home appliances and industrial applications. The sensors are produced in CMOS technology and include a temperature-compensated Hall plate with active offset compensation, a comparator, and an open-drain 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 active offset compensation leads to magnetic parameters which are robust against mechanical stress effects. In addition, the magnetic characteristics are constant in the full supply voltage and temperature range. The HAL 1xy family is available in the SOT89B SMD package and in the leaded TO92UA package. Features Major Applications The HAL 1xy is the optimal system solution for application fields, such as: V V V V V V V V V Temperature ranges – C (Commercial, TJ = 0 °C to +85 °C) – I (Industrial, TJ = 20 °C to +125 °C) Operates from 3.8 V to 24 V supply voltage Operates with static magnetic fields and dynamic magnetic fields up to 10 kHz 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 Constant switching points over a wide supply voltage and temperature 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 High temperature stability for home appliances and industrial applications High ESD rating V V V V White goods – selector switches – door lock detection – RPM detection Power tools – speed control – direction switch Home automation – garage openers – door openers Industrial applications – Endposition detection – RPM measurement of motors – Brushless DC motors – RPM measurements in flow meters – Replacement of micro switches V V PRODUCT INFORMATION HAL 1xy Family Overview Type HAL 101 HAL 102 HAL 103 HAL 104 HAL 106 HAL 107 HAL 108 HAL 109 Switching Behavior unipolar latching latching latching unipolar unipolar unipolar unipolar Sensitivity low high medium low high low medium high April/2009 System Architecture The Hall-effect sensor is a monolithic integrated circuit that switches 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 is used to compensate 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 built-in hysteresis eliminates oscillation and provides switching behavior of output without bouncing. Magnetic offset caused by mechanical stress is compensated for by using the “switching offset compensation technique”. HAL1xy 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 1xy 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 April 14, 2009; Order No. PI000134_001EN 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