Melexis MLX90224 Dual Hall Effect Latch handbook
Contents
1. y 0 387 1 700 lt q 0 289 Marked Surface All Dimensions in millimeters MARKING Line 1 ist and 2nd digits 98 3rd and 4th digits 36 Line 2 ist and 2nd digits 15 3rd digit A Ath and 5th digits 88 Year 1998 Week of Year Chip I D 90224 Chip Revision Lot Number PINOUT Pin 1 Vip Pin 2 Output 1 Pin 3 GND Pin 4 Output 2 NOTES 1 Controlling dimension mm 2 Leads must be free of flash and plating voids 3 Leads must not arc toward the rear of package 4 Lead frame material EFTEC 64T 5 Molding compound Sumitomo EME 6300H 6 Package dimensions exclude molding flash 7 Tolerance is 0 254mm unless otherwise specified For more information please contact Melexis Inc 41 Locke Road Concord NH 03301 Phone 603 223 2362 E mail sales melexis com Web www melexis com Fax 603 223 9614 MLX90224 Dual Hall Effect Latch Rev 1 2 lIs0 8002 8 May 99 Page 82. Flux Density mT Flux Density mT Temperature C Temperature C Power Dissipation versus Temperature Wave Soldering Parameters All Devices All Devices Solder Temperature C Package Power Dissipation mW VA Package Raja 175 C W JA 7 40 80 120 5 10 15 20 25 30 Temperature C Time in Wave Solder Seconds MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 5 General Descnption The MLX 90224 Speed and Direction Sensor is de signed for use with Multipole ring magnet targets hav ing evenly distributed North and South magnetic poles on the circumference of the magnet An example of the basic physical arrangement of the sensor and magnet is shown in Fig 1 The MLX90224 is available in 3 versions The first version will provide the user with two digital output signals Output S1 will provide a speed pulse from the changing magnetic flux at sensing element S1 Output S2 will provide a phase shifted output identical in pulse width and period to S1 This version is referred to as MLX90224 A The MLX90224 B version will provide an output signal that decodes the phase shifted signals to directly pro vide an output for the speed which is twice the natural frequency of the alternating magnetic field from the pole spacing of the multipole ring m
3. Output Output R1 5 6kQ R2 3320 C1 10nF C2 2 2nF In severe cases it may be necessary to include a Zener diode to clamp positive interference and Schottky diodes to clamp negative excursions Direction Detection Circuit Timing Diagram CHANGE IN DIRECTION MLX90224 B Latch Output Latch Output Positive Edge Triggered D Flip Flop Direction Output DIRECTION DC Level SPEED MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 7 MLX90224 Dual Hall Effect Latch 1 32 3 76 3 86 4 50 lt 410 gt 45 X 1mm D Bevel 9836 y y 0 40 ee A gt j 0 22 gt a4 E l 0 10 lt REF 0 00 1 0 MAX 1 2 3 4 1 20 A 1 10 15 50 0 66 14 50 B 0 61 18 5 0 29 17 5 C 0 24 D 45 0 45 gt 4035 0 31 E 0 18 Tape Line Vv v VA Tape Dimensions f L IE VA Hall Plate Chip Location Hall Plates lt lt 2 700 0 25 x 0 25
4. 5 78 M LX 90224 fy FA oe MLX90224 M e lex Dual Hall Effect Latch a s Chopper Stabilized Amplifier Stage CMOS for Optimum Stability Quality and Cost Dual Output 4 5V to 28V Operation Phase Direction Detection B Pulse Doubling Output C 1 cati Direction Detector Speed Sensor Shaft Encoding Position Sensing Ordering Information Part No Temperature Suffix Package Temperature Range MLX90224 A L VA 40 C to 150 C Automotive MLX90224 B L VA 40 C to 150 C Automotive MLX90224 C L VA 40 C to 150 C Automotive Functional Diagram Descnption The MLX90224 series are dual Hall effect latches It includes two Hall effect latch functions of which typi cal thresholds are 2 0 mT In each latch the mag netic flux detection is performed by a switched silicon Voltage Replaced with Logic for Hall plate The Bop and Brp are temperature compen Regulator MLX90224 B Wos 7 sated and give a sensitivity temperature coefficient of 500 ppm C to compensate popular magnets The MLX90224 A C output transistor will be latched on Bop in the presence of a sufficiently strong South pole magnetic field facing the marked side of the pack age Similarly the output will be latched off Brp in A the presence of a North field Spacing on the plates is _ 1 85mm The MLX90224 B series are designed for direction AE a ial detection with a high speed chopper which pro
5. Effect Latch Typical Magnetic Switch Points Typical Magnetic Switch Points versus versus Supply Voltage Supply Voltage 90224 A B Flux Density mT Flux Density mT 10 15 20 25 Supply Voltage V Supply Voltage V Typical Saturation Voltage versus Temperature Vip 12V lour 20mA 90224 Typical Supply Current versus Supply Voltage Supply Current mA 10 15 20 i 40 80 120 160 200 Supply Voltage V Temperature C MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 3 MLX90224 Dual Hall Effect Latch Typical Magnetic Switch Points Typical Magnetic Switch Points versus versus Temperature Temperature 90224 A B 90224 C Flux Density mT Flux Density mT 40 80 120 160 200 40 80 120 160 200 Temperature C Temperature C Output Voltage Output Voltage versus versus Flux Density Flux Density 90224 A B 90224 C Output Voltage V Output Voltage V Flux Density mT Flux Density mT MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 4 MLX90224 Dual Hall Effect Latch Min Max Magnetic Switch Min Max Magnetic Switch Range Range versus versus Temperature Temperature 90224 A B Only
6. agnet The other output pin will represent the direction and will change from logic high to logic low when the direction of rota tion of the magnet is reversed This then allows to di rectly see the condition of the speed with twice the resolution of the MLX90224 A and to also know di rectly the direction of rotation of the target The third version of this product the MLX90224 C will be iden tical in function of the A but with less sensitive mag netic switch points The MLX90224 A has Latching magnetic Bop and Brp values of typically 2mT as does the internal circuitry of the B The C version has also Latching magnetic trip points but with the thresh olds set to 25mT MLX90224 Dual Hall Effect Latch N Fig 1 Cross Reference The MLX90224LVA can replace the following Hall effect devices Allegro A3421 KA A3422KA Absolute Maximum Ratings Supply Voltage Operating Voo Reverse Voltage Protection supply Current lop 50MA Output On Current lo ssns Sensor S1 en nm Sensor S2 igital Output S1 Digital Output S2 Flux Density Degrees of Rotation MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 6 MLX90224 M e ex S Dual Hall Effect Latch Severe Environment and Automotive Protection Circuit Microcontroller Application Schematic Vop with EMC Protection Controller
7. vides y I5us delay Note Static sensitive device please observe ESD precautions MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 1 1 MLX90224 e ex Dual Hall Effect Latch tonk miesgaied MLX90224 Electrical Specifications DC Operating Parameters TA 40 C to 150 C VDD 4 5V to 28V Unless otherwise specified Parameter Symbol Test Conditions Min Typ Max Units Supply Voltage VoD Operating i V Output Current lout B gt Bop aE mA Output Voltage Vsat B gt Bopr lout 20 mA 400 mV Output Voltage Vout B lt Brp V Output Leakage ILEAK B lt Brp Vout Vop uA Oscillator Frequency Fosc MLX90224 A B 200 kHz MLX90224 C 400 kHz Refresh Time MLX90224 A B 15 us MLX90224 C 7 5 us MLX90224 Magnetic Specifications DC Operating Parameters TA 40 C to 150 C VDD 4 5V to 28V Unless otherwise specified Parameter Symbol Test Conditions Min Typ Max Units Operate Point Bop MLX90224 A B 0 5 4 0 mT MLX90224 C 25 27 mT Release Point BrP MLX90224 A B 4 0 0 5 mT MLX90224 C 23 27 mT Hysteresis Bhys MLX90224 A B 3 0 5 5 mT MLX90224 C 48 52 mT Notes 1 mT 10Giss Melexis Inc reserves the right to make changes without further notice to any products herein to improve reliability function or design Melexis does not assume any liability arising from the use of any product or application of any product or circuit described herein MLX90224 Dual Hall Effect Latch Rev 1 2 8 May 99 Page 2 MLX90224 Dual Hall
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