Solid State Hall Effect Sensors
High Performance Miniature Ratiometric Linear
490
erie
Sensing and Control
FEATURES
•
Small size (.160 x .118 in)
•
Power consumption of 7 mA
at 5 VDC for energy
efficiency
•
Single current sinking or
current sourcing output
•
Linear output for circuit
design flexibility
•
Built-in thin film resistors are
laser trimmed for precise
sensitivity and temperature
compensation
•
Rail-to-rail operation
provides more useable
signal for higher accuracy
•
Temperature range of -40°C
to +150°C
•
Responds to either positive
or negative gauss
•
Quad Hall sensing element
for stable output
TYPICAL APPLICATIONS
•
Current sensing
•
Motor control
•
Position sensing
•
Magnetic code reading
•
Rotary encoder
•
Ferrous metal detector
•
Vibration sensing
•
Liquid level sensing
•
Weight sensing
WARNING
PERSONAL INJURY
• DO NOT USE these
products as safety or
emergency stop devices, or
in any other application
where failure of the product
could result in personal
injury.
Failure to comply with these
instructions could result in
death or serious injury.
The SS490 Series MRL (Miniature Ratiometric Linear) sensors are small,
versatile linear Hall effect devices which are operated by the magnetic field
from a permanent magnet or an electromagnet. The ratiometric output
voltage is set by the supply voltage and varies in proportion to the strength
of the magnetic field.
The integrated circuitry provides increased temperature stability and
sensitivity. Laser trimmed thin film resistors provide high accuracy (null to ±
3%, sensitivity up to ±3%) and temperature compensation. These linear
position sensors have an operating temperature range of -40C to +150°C,
appropriate for industrial and automotive environments. They respond to
either positive or negative gauss, monitoring either or both magnetic poles.
The quad Hall sensing element minimizes the effects of mechanical or
thermal stress on the output. The positive temperature coefficient of the
sensitivity (+0.02%/°C typical) helps compensate for the negative
temperature coefficients of low cost magnets, providing a robust design
over a wide temperature range. Rail-to-rail operation (over full voltage
range) provides a more usable signal for higher accuracy.
The recent extension to the product line, the SS490B Series, offers cost-
effective MRL sensing solutions with slightly wider specifications than the
SS490 high-performance products. Like the SS490 Series, the SS490B
has a typical sinking or sourcing output of 1.5 mA continuous, uses 7 mA of
supply current at 5.0 volts and 25C, and provides predictable performance
over the full temperature range. The SS490B Series sensors have wider
null and sensitivity tolerances and a wider drift over temperature.
The SS490B Series sensors are a new lower cost product line extension.
They complement the SS490 Series of small size, high accuracy and high
performance miniature linear products.
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet is for reference only.
Do not use this document as product installation information.
• Complete installation, operation, and maintenance information is
provided in the instructions supplied with each product.
Failure to comply with these instructions could result in death or
serious injury.
