PRODUCT INFORMATION

HAL 85x

Oct/2002

All information and data contained in this product information are without any commitment, are not to be consid-

ered as an offer for conclusion of a contract, nor shall they be construed as to create any liability. Product or

development sample availability and delivery are exclusively subject to our respective order confirmation form. By

this publication, Micronas GmbH does not assume responsibility for patent infringements or other rights of third

parties which may result from its use.

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Tel. +49-761-517-0

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Edition Oct. 1, 2002; Order No. 6251-604-1PI

Bandgap

Temperature

Oscillator

Switched

Digital

Open-Drain Output

OUT

GND

Supply

Dependent

Bias

Hall Plate

Signal

Processing

Level

Detection

A/D

Converter

Reference

EEPROM Memory

Lock

Control

Development Tools

Programming of the EEPROM memory and

calculation of the individual sensor charac-

teristics can easily be done with a PC and

the application kit from Micronas:

(hardware version 5.x)

Windows 9x/ 2000/ NT/ ME

System Architecture

The HAL 85x sensors are produced in a

proven automotive submicron CMOS tech-

nology.

The HAL 85x features a temperature-com-

pensated Hall plate with choppered offset

compensation, an A/D converter, digital sig-

nal processing, an open-drain output or out-

put current source, an EEPROM memory

with redundancy and lock function for the

calibration data and the output characteris-

tic, a serial interface for programming the

EEPROM, and protection devices on all

pins

The HAL 85x is programmable by modulat-

ing the supply voltage. No additional pro-

gramming pin is needed.

The internal digital signal processing is a

great benefit because analog offsets, tem-

perature shifts, and mechanical stress do

not degrade the sensor accuracy.

Fig. 1: Development tool setup

Fig. 2: Block diagram of the HAL 855

Serial Port

HAL Programmer Board