E910.44 Datasheet, PDF (1/1 Pages) ELMOS Semiconductor AG – Hall sensor IC

BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
ÿ Hall sensor IC
FEATURES
ÿ Supply voltage range 2.0V to 6.0V
ÿ Hall Sensor with two magnetic switching
thresholds
ÿ Provides three field strength ranges:
negative, near zero and positive
ÿ Two binary coded outputs for the recognised
field strength
ÿ Extremely low integral current consumption
of < 26µA in standard mode.
ÿ High measuring rate of typically 10k samples
per second in standard mode.
ÿ Slow measuring mode and/ or increased
sensitivity can be statically adjusted.
ÿ – 40°C to + 125°C operating temperature
ÿ SO8 package
APPLICATION
ÿ Motor speed and postition control
ÿ Magnetic field detection
ÿ Proximity switch
DESCRIPTION
The IC contains a Hall sensor and the appropriate measurement
system. It detects three levels of upright magnetic field: positive,
near zero and negative. These information are provided at two bi-
nary coded outputs for any logic or uC. The sampling rate is about
10kHz (typ.) allowing fast movement detection.
In order to attain a very low average current consumption, the IC
does short measurements and holds the result at the output until
the next cycle. During the hold-phase, the IC switches to stand-by
mode with very low power consumption.
With two mode pins it is possible to bring th IC (statically) into a
slow mode, reducing the current consumption furthermore. The
second pin switches into a mode of increased sensitivity, where
lower magnetic fields can be detected.
BLOCK DIAGRAM
84
VDD
supply
ON
Vint
Vref
Hall-
plate
LOW BAT
+
_
Vref.
+
_
POS
ctrl.
NEG
VDD
OUT1
µC
OUT2
clock
Autozero
Measure
MODE
DRIVER IC
I/O IC
SENSOR IC
Co-integrated pressure sensor
Tilt angle sensor
ÿ Hall sensor IC
SENSOR INTERFACE IC
PINNING
Pin Name
1 VDD
2 OUT1
3 OUT2
4 GND
5 TST _ 1/GAIN
6 TST _ 2
7 TST _ 3
8 SLOW
Description
Supply voltage
Output: ‘0‘ -Field very positive or Low Bat
‘1’- Field not positive (-> near nil or negative)
Output: ‘0‘ -Field very negative
‘1’- Field not positive (-> near nil or negative)
Ground
Sensitivity switching:
connect to GND: normal sensitivity;
connect to VDD: increased sensitivity;
pin not to be left open in the application
Connect to ground
Connect to ground
Switching the trigger rate:
connect to GND: normal trigger rate;
connect to VDD: V triggerrate;
pin not to be left open in the application
E910.44
PACKAGE
VDD
1
OUT1
2
OUT2
3
GND
4
8
SLOW
7
TST_3
6
TST_2
5
TST_1/GAIN
Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any
circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication
has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of
the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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elmos product catalog june 2005
85