PRODUCT INFORMATION
HAL 5xy
Sept/2006
HAL 5xy
Multipurpose Hall-Effect Sensor Family
The HAL 5xy family consists of different
Hall switches produced in CMOS technol-
ogy. All 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). Accord-
ingly, the output transistor is switched on or
off.
The sensors of this family differ in the
switching behavior and the switching points.
The active offset compensation leads to
constant magnetic characteristics over sup-
ply voltage and temperature range. In addi-
tion, the magnetic parameters are robust
against mechanical stress effects.
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 150 °C.
All sensors are available in the SMD-pack-
age SOT89B-1 and in the leaded versions
TO92UA-1 and TO92UA-2.
Features
Major Applications
The HAL 5xy is the optimal system solution
for applications, such as:
V
V
V
V
V
V
V
V
V
Switching offset compensation at typi-
cally 62 kHz
Operates from 3.8 V to 24 V
supply voltage
Overvoltage protection at all pins
Reverse-voltage protection at VDD-pin
Magnetic characteristics are robust
regarding mechanical stress effects
Short-circuit protected open-drain out-
put by thermal shut down
Operates with static magnetic fields and
dynamic magnetic fields up to 10 kHz
Constant switching points over a wide
supply voltage range
The decrease of magnetic flux density
caused by rising temperature in the sen-
sor system is compensated by a built-in
negative temperature coefficient of the
magnetic characteristics
Ideal sensor for applications in extreme
automotive and industrial environments
EMC corresponding to ISO 7637
Operates from
−40
°C to 170 °C junction
temperature
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
V
V
V
PRODUCT INFORMATION
HAL 5xy
Available Types and Switching Behavior
Sept/2006
Features
Switching
Behavior
HAL 501
bipolar
HAL 502
latching
HAL 503
latching
HAL 504
unipolar
HAL 505
latching
HAL 506
unipolar
HAL 508
unipolar
HAL 509
unipolar
HAL 516
unipolar
with
inverted
output
HAL 519
unipolar
with
inverted
output
(north
polarity)
high
HAL 523
unipolar
Sensitivity
very high
high
medium
medium
low
high
medium
low
high
low
System Architecture
The HAL 5xy sensors are monolithic inte-
grated circuits which switch 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.
The temperature-dependent bias increases
the supply voltage of the Hall plates and
adjusts the switching points to the decreas-
ing induction of magnets at higher tempera-
tures. If the magnetic field exceeds the
threshold levels, the open drain output
switches to the appropriate state. The built-
in hysteresis eliminates oscillation and pro-
vides switching behavior of the output with-
out bouncing.
HAL 5xy
V
DD
1
Reverse
Voltage &
Overvoltage
Protection
Temperature
Dependent
Bias
Hysteresis
Control
Short Circuit &
Overvoltage
Protection
Hall Plate
Switch
Comparator
Output
OUT
3
Clock
GND
2
Fig. 1:
Block diagram of the HAL 5xy
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 Sept. 26, 2006; Order No. 6251-712-1PI
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
MEMS sensors
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