hal 28xy feb/2008 product information hal ? 28xy linear hall-effect sensor fa mily with digital interfaces the hal 28xy family is a new generation of programmable hall-effect sensors. it consists of members with different digital interfaces, like lin, pwm, and sent (sae j2716). due to its internal structure, it is possible to easily generate new family members. the built-in risc processor allows a fast implementation of new output formats or customer-specific signal pro- cessing. all members within this family can be programmed without any additional pro- gramming pin. programming is done via lin frames or biphase-m telegrams depending on the family member. the hal 28xy family features a hall plate with spinning current offset compensation technique and a precise temperature sen- sor which is used for temperature compen- sation of both the hall sensors? sensitivity and offset. the sensors? signal path is handled by the risc processor. this is of great benefit because analog offsets, temperature shifts, and mechanical stress do not degrade the digital signals. major characteristics like magnetic field range, sensitivity, offset and the tempera- ture coefficients of sensitivity and offset can easily be adjusted to the magnetic circuit by programming the non-volatile memory. the hal 28xy family is available in the very small leaded package to-92ut. features high-precision linear hall-effect sensor spinning-current offset compensation built-in temperature sensor built-in risc processor digital signal processing up to 12 bit resolution customer-programmable temperature compensation of hall sensitivity (2 nd order) and hall offset (1 st order) operating junction temperature range: ? 40 c up to 170 c different interface options: ?lin2.0 ?sent ? pwm output up to 2 khz magnetic characteristics extremely robust against mechanical stress non-volatile eeprom with redundancy and lock function major applications due to the sensors? versatile programming characteristics and low drifts, the hal 28xy family is the optimal system solution for applications such as contactless potentiometers angular measurements (e.g. for fuel-level sensing) linear movement (e.g. seat track position) linear force or torque measurements current sensing
product information hal 28xy feb/2008 all information and data contained in this product information are without any commitment, are not to be consid- ered 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. 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 no part of this publication may be reproduced, photo- copied, stored on a retrieval system, or transmitted without the express written consent of micronas gmbh. edition feb. 6, 2008; order no. pi000121_001en development tools all communication is done by means of lin frames or biphase-m telegrams depending on the sensor type. for engineering pur- poses, micronas offers an easy-to-use application kit: micronas programmer board (hardware version 5.x) labview tm programming software for windows ? 9x/2000/xp/vista labview tm source code serial port hal programmer board fig. 1: development tool setup system architecture the hal 28xy sensors are produced in a proven automotive submicron cmos tech- nology. the hal 28xy family features a tempera- ture-compensated hall plate with spinning- current offset compensation, an a/d con- verter for the hall-plate, an a/d converter for the temperature sensor, digital signal processing (risc processor), different fully integrated digital interfaces including the physical layer, an eeprom memory with redundancy and lock function for the cali- bration data, and protection devices on all pins. the hal 28xy family is programmable by means of lin frames or by a biphase-m telegram. no additional programming pin is needed. internally temperature oscillator switched a/d risc processor dio vsup gnd eeprom memory lock control stabilized supply and protection devices dependent bias protection devices hall plate converter digital i/o 30k transceiver pwm sent ... temperature a/d sensor converter lin fig. 2: block diagram of the hal 28xy family
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