Programmable Linear Hall Sensors 81x

The HAL 810 and HAL 815 are programmable linear Hall
sensors which can be used for angle or distance measurements.
The major characteristics are programmable in a non-volatile
memory.
The HAL 815 has a ratiometric output characteristic; its output
voltage is proportional to the magnetic flux and the supply
voltage. The HAL 810 provides a pulse-width modulated (PWM)
output signal.
The sensors feature a temperature-compensated Hall plate with
choppered offset compensation, an A/D converter, an EEPROM
memory with redundancy and lock function for the calibration
data and protection devices at all pins. Due to the digital signal
processing, analog offsets, temperature shifts, and mechanical
stress do not degrade the sensor accuracy.
The tolerances of the sensor, the magnet and the mechanical
positioning can be compensated via programming by customer/
user in the final assembly. This offers a low-cost alternative for all
applications that presently need mechanical adjustment or laser
trimming for calibration.
Both sensors are available in the very small leaded packages
TO92UT-1 and TO92UT-2.

Features

» High-precision linear Hall sensors with digital signal processing

» PWM output signal with refresh rate of typically 125 Hz

   and up to 11 bit resolution (HAL 810)

» D/A converter with output driver (HAL 815)

» Multiple programmable magnetic characteristics in a nonvolatile

   memory (EEPROM ) with redundancy and lock function

» Open-circuit feature (ground and supply line break detection)

» Overvoltage and reverse voltage 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 (HAL 815)

» Programmable clamping function

» Digital signal processing

» Temperature characteristics programmable to match all

   common magnetic materials

» Programmable by modulation of the supply voltage

» Junction temperature range:

   K: -40°C ...+140°C

   A: -40°C ...+170°C

» Supply voltage: 4.5 V ... 5.5 V

Applications

» Rotary position measurements

» Level measurement

» Linear position detection

» Force/pressure measurement