mlx90254 Melexis Company, mlx90254 Datasheet
mlx90254
Available stocks
Related parts for mlx90254
mlx90254 Summary of contents
Page 1
... Differential Dynamic Hall Effect Sensor Package Code VA (4 leads) 2. Description The MLX90254 is a Differential Dynamic Hall Effect Sensor which has been developed for automotive crankshaft and ABS (anti-lock brake system) applications. The IC, combined with a magnet placed at his back, offers speed and position sensing of ferromagnetic tooth-wheels in dynamic operation (non zero speed) ...
Page 2
... ORDERING INFORMATION......................................................................................................................... 1 1. FUNCTIONAL DIAGRAM................................................................................................................... 1-1 2. DESCRIPTION.................................................................................................................................... 2-1 3. GLOSSARY OF TERMS ....................................................................................................................... 3 4. ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3 5. MLX90254 ELECTRICAL SPECIFICATIONS ...................................................................................... 4 6. MLX90254 SENSOR SPECIFIC SPECIFICATIONS ............................................................................ 5 7. GENERAL DESCRIPTION .................................................................................................................... 5 8. PERFORMANCE GRAPHS................................................................................................................... 6 9. RELIABILITY INFORMATION............................................................................................................... 7 10. ESD PRECAUTIONS............................................................................................................................. 7 11. PACKAGE INFORMATION................................................................................................................... 8 12. DISCLAIMER ......................................................................................................................................... 9 3901090254 Rev. 005 ...
Page 3
... Margin: the flux density of the magnetic field has to be higher or lower than the margin value to enable the next toggling of the output. 4. Absolute Maximum Ratings Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute- maximum-rated conditions for extended periods may affect device reliability. 3901090254 Rev. 005 Differential Dynamic Hall Effect Sensor Page MLX90254 Datasheet Jun/04 ...
Page 4
... MLX90254 Electrical Specifications DC Operating Parameters T = -40 A Parameter Symbol (1) Supply current can rise- max. in the 3-4 volts Vdd range. (2) Start-up time : when the wheel has started spinning, the output signal appears after a few teeth but a delay up to 150 ms could be seen before the highest accuracy/repeatability. ...
Page 5
... MLX90254 Sensor Specific Specifications DC Operating Parameters T = -40 A Parameter Symbol (4) The differential field must exceed assure the switching of the output 7. General Description Let us model the magnetic flux densities by sinusoids. If the wheel confirms a certain geometrical property, the two Hall cells see two magnetic flux densities in phase opposition. They are illustrated by the dashed sinusoid on figure 1 ...
Page 6
... Performance Graphs Jitter vs. Airgap 25 Deg.C 1.00 0.08 0.06 0.04 0. 0.4 0.8 1.2 Airgap (mm) 3901090254 Rev. 005 Differential Dynamic Hall Effect Sensor 1.00 0.08 0.06 0.04 0.02 1.6 2.0 2.4 Page MLX90254 Jitter vs. Airgap 150 Deg 0.4 0.8 1.2 1.6 Airgap (mm) 2.0 2.4 Datasheet Jun/04 ...
Page 7
... For more information on manufacturability/solderability see quality page at our website: http://www.melexis.com/html/pdf/MLXleadfree-statement.pdf 10. ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901090254 Rev. 005 Differential Dynamic Hall Effect Sensor Page MLX90254 Datasheet Jun/04 ...
Page 8
... Line 2: 5 digits (ZZZZZ) Back Side Marking 4 digits (YYWW) Page MLX90254 VA Hall Plate / Chip Location 2.250 +/-0 0.387 0.289 Hall Plates size: 0.20 x 0.20 Marked Surface All Dimensions in millimeters Not Used Vdd GND Output =Part Number MLX90254 = Version =Lot Number =Date Code Datasheet Jun/04 ...
Page 9
... E-mail: sales_europe@melexis.com 3901090254 Rev. 005 Differential Dynamic Hall Effect Sensor www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: All other locations: Phone: + Phone: +1 603 223 2362 E-mail: sales_usa@melexis.com Page MLX90254 ISO/TS16949 and ISO14001 Certified Datasheet Jun/04 ...