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MLX90224
Dual Hall Effect Latch
 Download MLX90224 Datasheet (PDF)
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MLX90224 General Description
The MLX90224 series are dual Hall effect latches. It includes two Hall effect latch functions of which typical thresholds are +/- 2.0 mT. In each latch, the magnetic flux detection is performed by
a switched silicon Hall plate. The BOP and BRP are
temperature-compensated and give a sensitivity temperature coefficient of 500 ppm/oC to compensate popular magnets. The MLX90224 A output transistor will be
latched on (BOP) in the presence of a sufficiently
strong South pole magnetic field facing the marked side of the package. Similarly, the output
will be latched off (BRP) in the presence of a
North field. Spacing on the plates is 1.85mm. The MLX90224 B series are designed for direction detection with a high speed chopper which provides 15ms delay.
MLX90224 Features and Benefits
- Chopper Stabilized Amplifier Stage
- CMOS for Optimum Stability, Quality and Cost
- Dual Output 4.5V to 26V Operation
- Phase/Direction Detection (B)
MLX90224 Environmental Information
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MLX90224 Frequently asked Questions
Hall Sensor application
Answer
In substituting for a potentiometer the analaog products to consider include the MLX90215, 90251 or 90242. Other products to consider from our sister company, Sentron, would be the 2SA-10. All of these devices require some permanent magnet field source to drive the output through the desired range for the desired mechanical displacement. See our Hall effect applications guide for more details.
An encoder with digital outputs can be realized with a simple Hall effect digital switch or latch like the US188x,288x, 588x or even the MLX90224. All of these devices will require an appropriate multipole ring magnet to create the multiple pole transitions per revolution needed to implement an encoder function. There are also some ideas on this in the Hall applicaitons guide at www.melexis.com
MLX90224 Rth
Question
Suppose I have an ambient temp of 140 degrees Celcius and the current is 5 mA typ @ 5 V, an additional 25 mW is dissipated. What is the thermal resistance of the MLX90224 package, so that I can calculate the junction temp?
Answer
The thermal resistance of the VA package (the one used for the MLX90224) is 200K/W.
MLX90224
Question
We have an idea to use mlx90224 in our speed sensor. Pls clarify the op.temperature which is given as
-40 to 85 c at one point and as -40 to 125 c as one spec.
Also pls suggest the general design points (v low, v high ,pullup resistor value selection )to be considered if a hall sensor should be used as open collector type output.
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