SS520 Series Dual Hall-effect Digital Position
Sensors with speed & direction outputs
Series SS520
FEATURES
l
Single miniature plastic package
includes two separate Hall sen-
sors
l
Frequency signal for speed out-
put
l
Logic level (High or Low) signal
for direction output
l
Temperature compensated mag-
netics
l
Functionality of two discrete Hall
sensors and logic circuitry out-
puts
l
Symmetry of operate/release
points about zero gauss
(bipolar/latching)
l
Low current consumption
l
Wide operating voltage range
TYPICAL APPLICATIONS
l
Anti-pinch electric motor control
systems for power windows, power
seats (headrest), power sliding
doors, sunroofs, garage door open-
ers.
l
Magnetic encoding for electronic
steering systems
l
Motion control sytems for pulleys
and belts
l
Position and velocity detection
l
Fan control
l
Rotating shaft monitoring
l
Linear displacement sensing (using
a magnetic strip of alternating
poles)
GENERAL DESCRIPTION
The Speed & Direction Hall-effect sensor has two distinct Hall sensing elements
precisely located 1.4 mm apart on a single integrated circuit chip, which is then
encapsulated in a thermoset molding material. Two active Hall latches provide
indication of the speed and direction of a magnetic gradient across the face of
the package, such as the gradient from a rotating ring magnet. The small, 4-pin
SOT89 style package surface mounts on PC boards and flexible circuits.
Built-in temperature compensation is optimized to match the temperature coeffi-
cient of low cost magnets and track their performance over temperature.
Latching magnetics are standard for reliable operation.
A novel regulator circuit provides extremely stable operation with supply volt-
ages as low as 3.4 Vdc and as high as 24 Vdc. A typical room temperature cur-
rent consumption of 7.5 mA helps conserve power in battery operation. SS520
series sensors can use existing power supply sources in most applications, and
can be directly interfaced with many electronic components without buffering or
compensation circuitry.
CAUTION
WAVE SOLDER DAMAGE
DO NOT wave solder this product.
Wave soldering may negatively affect the sensor performance and reliability.
Subjecting the sensor to wave soldering will void Honeywell’s warranty.
Failure to comply with these instructions may result in product damage.
NOTICE
Interruption of power to a latching device may cause the output to change
state when power is restored. If a magnetic field of sufficient strength is pres-
ent, the sensor output will be in the condition dictated by the magnetic field.
Sensing and Control
HONEYWELL [ HONEYWELL SOLID STATE ELECTRONICS CENTER ]
