ADVANCE INFORMATION
HAL700
1.1. Features
– two independent Hall-switches
1. Introduction
The HAL 700 is a monolithic CMOS Hall-effect sensor
consisting of two independent latched switches (see
tics controlling two independent open-drain outputs.
The Hall plates of the two switches are spaced
2.35 mm apart.
In combination with an active target providing a
sequence of alternating magnetic north and south
poles, the sensor forms a system generating the sig-
nals required to control position, speed, and direction
of the target movement.
The device includes temperature compensation and
active offset compensation to provide excellent stability
and matching of the switching points in the presence of
mechanical stress over the whole temperature- and
supply voltage range. This is required by systems
which determine the direction by comparing two trans-
ducer signals.
The sensor is designed for industrial and automotive
applications and operates with supply voltages from
3.8 V to 24 V in the ambient temperature range from
−40 °C
up to 125
°C.
The HAL 700 is available in the SMD package
SOT-89B.
– distance of Hall plates: 2.35 mm
– low sensitivity
– typical B
ON
: 14.9 mT at room temperature
– typical B
OFF
:
−14.9
mT at room temperature
– temperature coefficient of
−2000
ppm/K in all mag-
netic characteristics
– switching offset compensation at typically 150 kHz
– operation from 3.8 V to 24 V supply voltage
– operation with static and dynamic magnetic fields up
to 10 kHz
– overvoltage protection at all pins
– reverse-voltage protection at V
DD
-pin
– robustness of magnetic characteristics against
mechanical stress
– short-circuit protected open-drain outputs by ther-
mal shutdown
– constant switching points over a wide supply voltage
range
– EMC corresponding to DIN 40839
1.2. Applications
The HAL 700 is the ideal sensor for position-control
applications with direction detection and alternating
magnetic signals such as:
– multipole magnet applications,
– rotating speed and direction measurement,
position tracking (active targets), and
– window lifters.
Micronas
3
MICRONAS [ MICRONAS ]
