hal 2830 may/2008 product information hal ? 2830 linear hall-effect sensor with sent output the hal 2830 is a new member of the micronas variohal (hal 28xy) family of programmable linear hall-effect sensors. it features a digital sent interface (singleedgenibbletransmission) that enables a fast and robust data transfer in harsh automotive environments. the implementation of the interface com- plies with the sae j2716 sent standard. each message consists of a sequence of pulses. in one protocol, the sensor trans- mits the magnetic field information, a status information of the sensor, and for safety reasons a crc checksum. the hal 2830 features a hall-plate with spinning current offset compensation tech- nique and a precise temperature sensor which is used for temperature compensa- tion of both the hall-sensors sensitivity and offset. the sensor provides digital signal process- ing. this is of great benefit because analog offsets, temperature shifts, and mechanical stress do not degrade 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 2830 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 on-board diagnostics (overtemperature, overcurrent, etc.) customer-programmable temperature compensation of output sensitivity (2 nd order) and output offset (1 st order) operating junction temperature range: ? 40 c 170 c. magnetic characteristics extremely robust against mechanical stress digital signal processing sampling rates up to 2 khz with internal low-pass filter sent output according to sae j2716 standard message tick time customer-program- mable between 2 s and 17 s low time customer-programmable between 3 and 7 clock ticks three data nibbles for magnetic field information sample accurate transmission telegram length less than 360 s at 2 s tick time 12-bit resolution non-volatile eeprom with redundancy and lock function open-drain output with slew rate control transmission of temperature information individual serial number for each sensor 12-bit customer serial number major applications due to the sensor?s versatile programming characteristics and low drifts, the hal 2830 is the optimal system solution for applica- tions such as: contactless potentiometers angular measurements (e.g. valve, throttle, pedal position) linear movement (e.g. seat track position) linear force or torque measurements current sensing (e.g. battery management)
product information hal 2830 may/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 may 2, 2008; order no. pi000124_001en development tools for engineering and production purposes, micronas offers an easy-to-use application kit: micronas programmer board (hal-apb v 1.3) labview tm programming software for windows ? 9x/2000/xp/vista labview vis serial port hal programmer board fig. 1: development tool setup system architecture the hal 2830 sensors are produced in a proven automotive submicron cmos tech- nology. the hal 2830 features a temperature-com- pensated hall plate with spinning-current offset compensation, an a/d converter for the hall-plate, an a/d converter for the tem- perature sensor, digital signal processing (risc processor), a digital sent interface, an eeprom memory with redundancy and lock function for the calibration data and the sent output configuration, and protection devices on all pins. the hal 2830 is programmable by means of biphase-m telegrams. no additional pro- gramming pin is needed. the sensor is pro- grammed through its output pin. open-drain output with slew rate control internally temperature oscillator switched a/d digital dio vsup gnd eeprom memory lock control stabilized supply and protection devices dependent bias protection devices hall plate converter signal processing temperature a/d sensor converter sent molule fig. 2: block diagram of the hal 2830
|
