PRODUCT INFORMATION
Oct/2002
HAL 85x
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:
Serial Port
◆ Micronas programmer board
(hardware version 5.x)
HAL Programmer Board
◆ Visual Basic programming software for
Windows 9x/2000/NT/ME
◆ Visual Basic source code
Fig. 1: Development tool setup
System Architecture
The HAL 85x sensors are produced in a
proven automotive submicron CMOS tech-
nology.
V
DD
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
Temperature
Dependent
Bias
Bandgap
Reference
Oscillator
Digital
Signal
Processing
OUT
Switched
Hall Plate
A/D
Converter
Open-Drain Output
The HAL 85x is programmable by modulat-
ing the supply voltage. No additional pro-
gramming pin is needed.
Supply
Level
Detection
Lock
Control
EEPROM Memory
GND
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. 2: Block diagram of the HAL 855
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.
No part of this publication may be reproduced, photo-
copied, stored on a retrieval system, or transmitted
without the express written consent of Micronas GmbH.
Edition Oct. 1, 2002; Order No. 6251-604-1PI
Micronas GmbH Hans-Bunte-Strasse 19 D-79108 Freiburg (Germany) P.O. Box 840 D-79008 Freiburg (Germany)
Tel. +49-761-517-0 Fax +49-761-517-2174 E-mail: docservice@micronas.com www.micronas.com
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