Introduction
The HAL 805 is a recent member of the Micronas family of programmable linear Hall sensors. As an extension to the HAL 800, it offers open-circuit detection and individual programming of different sensors which are in parallel to the same supply voltage.

FEATUREs
– high-precision linear Hall effect sensor with ratiometric output and digital signal processing
– multiple programmable magnetic characteristics in a non-volatile memory (EEPROM) with redundancy and lock function
– open-circuit detection (ground and supply line break detection)
– for programming an individual sensor within several sensors in parallel to the same supply voltage, a selection can be done via the output pin
– to enable programming of an individual sensor amongst several sensors running parallel to the same supply voltage, each sensor can be selected via its output pin
– temperature characteristics are programmable for matching all common magnetic materials
– programmable clamping function
– programming through a modulation of the supply voltage
– operates from −40 °C up to 150 °C ambient temperature
– operates from 4.5 V up to 5.5 V supply voltage in specification and functions up to 8.5 V
– total error < 2.0% over operating voltage range and temperature range
– operates with static magnetic fields and dynamic magnetic fields up to 2 kHz
– 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

1.1. Major Applications
Due to the sensor’s versatile programming character istics, the HAL 805 is the optimal system solution for
applications such as:
– contactless potentiometers,
– angle sensors,
– distance measurements,
– magnetic field and current measurement.