HAL817UT-A

The supplier will be discontinuing this product. The last order date is March 29th, 2019. Please see Product Change Notification attached in the documents section.The HAL817 is a member of the Micronas family of programmable linear Hall sensors. HAL817 replaces the HAL815 and should be used for new designs. It is possible to program different sensors which are in parallel to the same supplyvoltage individually.The HAL817 is an universal magnetic field sensor with a linear output based on the Hall effect. The IC 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 HAL817 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 HAL817 is programmable by modulating the supply voltage. No additional programming pin is needed. The easy programmability allows a 2-point calibration by adjusting the output voltage directly to the input signal (like mechanical angle, distance, or current). 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. This offers a low-cost alternative for all applications that presently need mechanical adjustment or laser trimming for calibrating the system.In addition, the temperature compensation of the Hall IC can be fit to all common magnetic materials by programming first and second order temperature coefficients of the Hall sensor sensitivity. This enables operation over the full temperature range with high 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 HAL817 is available in the very small leaded packages TO92UT-1 and TO92UT-2.Major Applications: Due to the sensor’s versatile programming characteristics, the HAL817 is the optimal system solution forapplications such as:• contactless potentiometers,• angle sensors,• distance measurements,• magnetic field and current measurement. 9icnet Electronics (and its e-commerce division: 9icnet.com) is an authorized Micronas distributor.