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| PRODUCT INFORMATION HAL 1500 Oct/2002 HAL 1500 Programmable Low-Voltage Hall-Effect Switch The HAL 1500 is a programmable Hall switch designed and produced in an automotive submicron CMOS technology and can be used for position detection and rotating speed measurement. The major magnetic characteristics like switching points, temperature coefficient of switching points, and output switching polarity are programmable in a non-volatile memory. The HAL 1500 is programmable by modulating the voltage on the output pin of the sensor. No additional programming pin is needed. An individual adjustment of each sensor during the customer's manufacturing process is possible. With this calibration procedure, the tolerances of the sensor, the magnet and the mechanical positioning can be compensated in the final assembly. The HAL 1500 eases logistic because its characteristics can be programmed within a wide range. Therefore, one Hall IC type can be used for various applications. Features x High-precision programmable Hall-effect sensor with open-drain output x Programmable via output pin x Choppered offset compensation x Operates from 3.5 V to 18 V supply voltage x Operates from -40 C to 150 C ambient temperature x Operates with magnetic fields from DC to 10 kHz x Programmable as a digital switch or as a multi-level switch with 4-bit resolution and PWM (Pulse Width Modulated) output signal x Programmable magnetic switching points (digital switch) or programmable magnetic range and reference level (multi-level switch) x Programmable temperature coefficient of magnetic switching points x Lock function and built-in redundancy for EEPROM memory x Overvoltage protection on all pins and reverse-voltage protection on VDD pin x Short-circuit protected open-drain output by thermal shut-down x Magnetic characteristics extremely robust against mechanical stress x EMC-optimized design x Available in TO-92UA and SOT-89B package Major Applications Due to the sensor's versatile programming characteristics, the HAL 1500 is the optimal system solution for x Applications with large air gap or weak magnets, x Rotating speed measurements, x Camshaft sensors applications, x Solid state switches, x Contactless solutions for replacing microswitches, x Position/end-point detection, and x Multi-pole magnet applications. PRODUCT INFORMATION HAL 1500 Development Tools The programming of the EEPROM memory and the calculation of the individual sensor characteristics can easily be done with a PC and the application kit from Micronas: x Micronas programmer board (hardware version 5.0) x Visual Basic programming software for Windows 9x/2000/NT/ME x Visual Basic source code HAL Programmer Board Serial Port Oct/2002 Fig. 1: Development tool setup System Architecture The HAL 1500 includes a temperature-compensated Hall plate with active offset compensation, a comparator, an open-drain output transistor, an EEPROM memory with lock function for the calibration data, a serial interface for programming the EEPROM, and protection devices on all pins. The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the programmed reference values (switching points). Accordingly, the output transistor is switched on or off. Single-Level Switch Output Mode When the magnetic field exceeds or drops below the programmable threshold levels, the comparator switches to the appropriate state to control the MOSFET (open-drain) output. Multi-Level Switch Output Mode An internal counter ramps the switching level. When the counter reaches the level of the external magnetic field, the comparator switches and the sensor provides a PWMcoded output signal. VDD Internally stabilized Supply and Protection Device Temperaturedependent Bias Comparator Protection Devices Switched Hall Plate Output Control Output Out Oscillator Switching Control EEPROM Memory VSS Lock Control Programming Interface Fig. 2: Block diagram of the HAL 1500 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 October 1, 2002; Order No. 6251-496-1PI 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 |
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