Programmable Linear Hall Effect Sensor

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The HAL® 805 is a recent member of the Micronas family of programmable linear Hall sensors. It offers open circuit detection and individual programming of different sensors which are in parallel to the same supply voltage. The HAL 805 is an universal magnetic field sensor with a linear output based on the Hall effect. The IC is designed and produced in sub-micron CMOS technology and can be used for angle or distance measurements if combined with a rotating or moving magnet. The major characteristics like magnetic field range, sensitivity, output quiescent voltage (output voltage at B = 0 mT), and output voltage range are programmable in a non-volatile memory. The sensor has a ratiometric output characteristic, which means that the output voltage is proportional to the magnetic flux and the supply voltage. The HAL805 features a temperature-compensated Hall plate with choppered offset compensation, an A/D converter, digital signal processing, a D/A converter with output driver, an EEPROM memory with redundancy and lock function for the calibration data, a serial interface for programming the EEPROM, and protection devices at all pins. The internal digital signal processing is of great benefit because analog offsets, temperature shifts, and mechanical stress do not degrade the sensor accuracy. The calculation of the individual sensor characteristics and the programming of the EEPROM memory can easily be done with a PC and the application kit from Micronas. The sensor is designed for hostile industrial and automotive applications and operates with typically 5 V supply voltage in the ambient temperature range from -40°C up to 150°C. The HAL 805 is available in the very small leaded packages TO92UT-1 and TO92UT-2.


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High-precision linear Hall effect sensor with ratiometric output and digital signal processing
EEPROM programmable with redundancy and lock function
Open-circuit detection (ground and supply line break detection)
Individual sensor within several sensors in parallel to the same supply voltage
Operates with static and dynamic magnetic fields up to 2 kHz
Programmable clamping function
Programming through a modulation of the supply voltage
Operates from -40C up to 150C ambient temperature
Operates from 4.5V up to 5.5V supply voltage in specification and functions up to 8.5V
Temperature characteristics are programmable for matching all common magnetic materials
Overvoltage and reverse-voltage protection at all pins
Magnetic characteristics extremely robust against mechanical stress
Short-circuit protected push-pull output
EMC and ESD optimized design


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Block Diagram
Product Selection Guide
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