PRODUCT INFORMATION HAL 1821/1822/1823 July/2009 HAL® 1821/1822/1823 Linear Hall-Effect Sensor Family The HAL 1821/1822/1823 are new members of the linear Hall-effect sensor family HAL 182x, offering excellent performance/ price trade-off. They are universal magnetic field sensors with a ratiometric, linear analog output. The members of the sensor family can be used for magnetic field measurements, current measurements and detection of any mechanical movement. Very accurate angle measurements or distance measurements can also be carried out. The sensors are very robust and can be used in harsh electrical and mechanical environments. The output voltage is proportional to the magnetic flux density through the Hall plate. The choppered offset compensation leads to stable magnetic characteristics over supply voltage and temperature. The different family members vary by sensitivity (25 mV/mT, 31.25 mV/mT and 50 mV/mT). The quiescent output voltage (offset) for all family members is 50% of the supply voltage. The sensors are designed for industrial and automotive applications and operate in the junction temperature range from –40 °C up to 170 °C. They are available in the very small leaded package TO92UA and in the small SMD package SOT89B. Features V V V V V V V V V V V V V Linear Hall-effect sensor with ratiometric analog output Temperature and stress stable quiescent output voltage Very accurate sensitivity and offset Major Applications V Due to the sensor’s versatile programming characteristics and its high accuracy, the HAL 1821/1822/1823 is the optimal system solution for applications such as: – – – – – Linear position measurements Angle sensors Distance measurements Current measurements Magnetic field measurements Customized versions possible On-chip temperature compensation Active offset compensation Operates from –40 °C up to 170 °C junction temperature Operates from 4.5 V up to 5.5 V supply voltage Operates with static magnetic fields and dynamic magnetic fields up to 1 kHz Overvoltage and reverse-voltage protection on VDD pin Magnetic characteristics are extremely robust against mechanical stress. Short-circuit protected push-pull output EMC and ESD optimized design Family Overview Type Offset Sensitivity 1821 50% of VDD 50 mV/mT 1822 50% of VDD 31.25 mV/mT 1823 50% of VDD 25 mV/mT PRODUCT INFORMATION HAL 1821/1822/1823 July/2009 System Architecture The HAL 1821/1822/1823 sensors are produced in a proven submicron CMOS technology. The HAL 1821/1822/1823 feature a temperature-compensated Hall plate with choppered offset compensation, an A/D converter, digital signal processing, an analog output and protection devices on all pins. VDD Internally stabilized Supply and Protection Devices The internal digital signal processing is a great benefit because analog offsets, temperature shifts, and mechanical stress do not degrade the sensor accuracy. Switched Hall Plate Temperature Dependent Bias Oscillator A/D Converter Digital Signal Processing Overvoltage, Undervoltage Detection D/A Converter Analog Output Protection Devices 50 OUT Calibration Control GND Fig. 1: Block diagram of the HAL 1821/1822/1823 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 July, 14, 2009; Order No. PI000135_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: [email protected] ⋅ www.micronas.com