Micronas HAL206 Low-cost hall-effect sensor family Datasheet

PRODUCT INFORMATION
HAL 2xy
April/2009
HAL 2xy
Low-Cost Hall-Effect Sensor Family
The HAL 2xy Hall switch family is produced
in CMOS technology. The sensors include a
temperature-compensated Hall plate with
active offset compensation, a comparator,
and an open-drain output transistor.
The comparator compares the actual magnetic flux through the Hall plate (Hall voltage) with the fixed reference values (switching points). Accordingly, the output
transistor is switched on or off.
The active offset compensation leads to
magnetic parameters which are robust
against mechanical stress effects. In addition, the magnetic characteristics are constant in the full supply voltage and temperature range.
The sensors are designed for industrial and
automotive applications and operate with
supply voltages from 3.8 V to 24 V in the
ambient temperature range from −40 °C up
to 125 °C.
The HAL 2xy family is available in the
SOT89B SMD package and in the leaded
TO92UA package.
Features
V
V
V
V
V
V
V
V
V
V
Operates from 3.8 V to 24 V supply voltage
Operates with static magnetic fields and
dynamic magnetic fields up to 10 kHz
Overvoltage protection at all pins
Reverse-voltage protection at VDD pin
Magnetic characteristics are robust
against mechanical stress effects
Short-circuit protected open-drain output by thermal shut down
Constant switching points over a wide
supply voltage and temperature range
The decrease of magnetic flux density
caused by rising temperature in the sensor system is compensated by a built-in
negative temperature coefficient of the
magnetic characteristics
High temperature stability for automotive
or industrial applications
High ESD rating
Major Applications
The HAL 2xy is the optimal system solution
for applications, such as:
V
V
V
V
V
Endposition detection
RPM measurement of motors in various
applications, such as power window
Brushless DC motors
RPM measurements in flow meters
Replacement of micro switches
PRODUCT INFORMATION
HAL 2xy
April/2009
Available Types and Behavior
Type
Switching Behavior
Sensitivity
Power-on and Undervoltage Reset
HAL 201
unipolar
low
–
HAL 202
latching
high
–
HAL 203
latching
medium
–
HAL 204
latching
low
–
HAL 206
unipolar
high
–
HAL 207
unipolar
low
–
HAL 208
unipolar
medium
–
HAL 210
unipolar
high
–
HAL 220
latching
high
•
HAL 221
unipolar
low
•
System Architecture
The Hall-effect sensor is a monolithic integrated circuit that switches in response to
magnetic fields. If a magnetic field with flux
lines perpendicular to the sensitive area is
applied to the sensor, the biased Hall plate
forces a Hall voltage proportional to this
field. The Hall voltage is compared with the
actual threshold level in the comparator.
HAL2xy
VDD
1
Temperature
Dependent
Bias
Hall Plate
The temperature-dependent bias is used to
compensate the decreasing induction of
magnets at higher temperatures. If the magnetic field exceeds the threshold levels, the
open-drain output switches to the appropriate state. The built-in hysteresis eliminates
oscillation and provides switching behavior
of output without bouncing.
Magnetic offset caused by mechanical
stress is compensated for by using the
“switching offset compensation technique”.
Reverse
Voltage &
Overvoltage
Protection
Hysteresis
Control
Short Circuit &
Overvoltage
Protection
Comparator
Switch
OUT
Output
3
Clock
GND
2
Fig. 1: Block diagram of the HAL 2xy
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 April 6, 2009; Order No. PI000010_002EN
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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