The HAL 85x complement the existing Hall- effect sensor family HAL 8xx. Both universal magnetic field sensors provide an arbitrary output signal. The sensors are produced in submicron CMOS technology.
In combination with a rotating or moving magnet, the sensors can be employed for angle, distance, and level measurements. The sensors provide either a pulse width modulated (PWM) output signal or a serial Biphase-M output.
Major characteristics like magnetic field range, output characteristic, output format, sensitivity, shift (duty cycle of the PWM output signal or the serial output word), PWM period, low and high current, and the temperature coefficients can easily be adjusted to the magnetic circuit (linear and quadratic) by programming the non-volatile memory. The output characteristic can be set with 32 setpoints with a resolution of 9 bit
The sensors were designed to translate a linear magnetic field into an arbitrary output signal or a non-linear magnetic field into a linear output signal. The sensors are available in the very small leaded package TO-92UT.
Block diagram – system architecture
The HAL 85x sensors are produced in a proven automotive submicron CMOS technology.The HAL 85x features a temperature-compensated Hall plate with choppered offset compensation, an A/D converter, digital signal processing, an open-drain output or output current source, an EEPROM memory with redundancy and lock function for the calibration data and the output characteristic, a serial interface for programming the EEPROM, and protection devices on all pinsThe HAL 85x is programmable by modulating the supply voltage. No additional programming pin is needed.The internal digital signal processing is a great benefit because analog offsets, temperature shifts, and mechanical stress do not degrade the sensor accuracy.