Micronas HAL880 Programmable linear hall-effect sensor Datasheet

PRODUCT INFORMATION
HAL 880
Sept/2008
HAL® 880
Programmable Linear Hall-Effect Sensor
The HAL 880 complements the existing
Hall-effect sensor family HAL 8xy to the
lower end. It is designed to fulfil the requirements of today’s state-of-the-art applications for linear and angular measurements
that require programmability to compensate
system tolerances.
Due to its good drift performance and programmability, the sensor can easily replace
non-programmable, standard linear sensors
in a wide variety of applications. Due to its
programmability, it also offers the additional
advantage of compensation of system tolerances. This is mandatory for applications
like accelerator pedal sensing, current measurement, bending light, or head light
adjustment.
The sensor provides a linear, ratiometric
analog output signal with implemented wirebreak detection working with pull-up or pulldown resistor.
Major characteristics like magnetic-field
range, sensitivity, VOQ (output voltage at
zero magnetic field), and the temperature
coefficients can easily be adjusted to the
magnetic circuit (linear and quadratic) by
programming the non-volatile memory.
The HAL 880 is available in the very small
leaded package TO92UT.
Main Features
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Sensitivity drift over temperature less
than ±6%
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Offset drift over temperature less than
±15 μT/K
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Integral non-linearity error of output
signal ±1% of VDD
Ratiometric error of output signal ±1%
Low output noise of 25 mV peak-peak
Wire-break detection with 5 kΩ pull-up or
pull-down resistor
Four programmable magnetic ranges:
±30, ±60, ±80, and ±100 mT
Two programmable 3 dB filter frequencies: 500 Hz and 1 kHz
Programmable sensitivity and offset
(VOQ)
12-bit ratiometric analog output
Digital signal processing
Temperature characteristics programmable to match all common magnetic materials
13 customer data bits
Programming by modulation of the
supply voltage
Operates from –40 °C up to 140 °C
junction temperature
Operates from 4.5 V up to 5.5 V supply
voltage
Magnetic characteristics extremely
robust against mechanical stress
Major Applications
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Due to the sensor’s versatile programming characteristics, the HAL 880 is the
optimal system solution for applications
such as:
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Contactless potentiometers
Rotary position measurement
Linear movement
Current measurements
PRODUCT INFORMATION
HAL 880
Sept/2008
Development Tools
Programming of the EEPROM memory and
calculation of the individual sensor characteristics can easily be done with a PC and
the application kit from Micronas:
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Serial Port
Micronas programmer board
(hardware version 5.x)
Visual Basic® programming software for
Windows® 9x/2000/XP
HAL Programmer Board
Visual Basic source code
Fig. 1: Development tool setup
System Architecture
The HAL 880 sensors are produced in a
proven submicron CMOS technology.
The HAL 880 features a temperature-compensated Hall plate with choppered offset
compensation, an A/D converter, digital signal processing, a push-pull output, an
EEPROM memory with redundancy and
lock function for the calibration data and the
data register information, a serial interface
for programming the EEPROM, and protection devices on all pins.
VDD
Internally
stabilized
Supply and
Protection
Devices
Switched
Hall Plate
The HAL 880 is programmable by modulating the supply voltage. No additional programming pin is needed.
Temperature
Dependent
Bias
Oscillator
A/D
Converter
Digital
Signal
Processing
D/A
Converter
Protection
Devices
OUT
Analog
Output
EEPROM Memory
Lock Control
The internal digital signal processing is of
great benefit because analog offsets, temperature shifts, and mechanical stress do
not degrade the sensor accuracy.
Open-circuit,
Overvoltage,
Undervoltage
Detection
Open-circuit
Detection
GND
Fig. 2: Block diagram of the HAL 880
All information and data contained in this product information are without any commitment, are not to be considered 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, photocopied, stored on a retrieval system, or transmitted
without the express written consent of Micronas GmbH.
Edition Sept. 17, 2008; Order No. PI000127_001EN
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: [email protected] ⋅ www.micronas.com
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