HAL85X View Datasheet(PDF) - Micronas

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HAL85X

Programmable Hall-Effect Sensors with Arbitrary Output

Micronas 

PRODUCT INFORMATION

HAL 85x

Oct/2002

HAL 85x

Programmable Hall-Effect Sensors with Arbitrary Output

The HAL 85x complement the existing Hall-

effect sensor family HAL 8xx. Both univer-

sal magnetic field sensors provide an arbi-

trary output signal. The sensors are pro-

duced 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 out-

put signal or the serial output word), PWM

period, low and high current, and the tem-

perature 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 avail-

able in the very small leaded package

TO-92UT.

Features

◆ High-precision linear Hall effect sensors

with different output formats

◆ Various programmable magnetic charac-

teristics with non-volatile memory

◆ Programmable output characteristic

(32 setpoints with 9 bit resolution)

◆ Programmable output formats

(PWM or serial Biphase-M)

◆ Programmable PWM Period

◆ Open-drain output for HAL 855

◆ Programmable output current source for

HAL 856 (low and high current)

◆ Digital signal processing

◆ Temperature characteristics program-

mable for matching all common mag-

netic materials

◆ Programming by modulation of the

supply voltage

◆ Lock function and built-in redundancy for

EEPROM memory

◆ Operates from –40 °C up to 150 °C

ambient temperature

◆ Operates from 4.5 V up to 18 V supply

voltage

◆ Operates with static magnetic fields and

dynamic magnetic fields up to 2 kHz

◆ Choppered offset compensation

◆ Overvoltage protection on all pins

◆ Reverse-voltage protection on VDD pins

◆ Magnetic characteristics extremely

robust against mechanical stress

◆ Short-circuit protected output

◆ EMC-optimized design

Major Applications

Due to the sensor’s versatile programming

characteristics, the HAL 85x is the optimal

system solution for applications such as:

◆ Contactless potentiometers

◆ Rotary position measurement

◆ Level measurement

◆ Linear position detection

◆ Magnetic field detection

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