MLX90224

MLX90224 Dual Hall Effect Switch Features and Benefits Chopper Stabilized Amplifier Stage CMOS for Optimum Stability, Quality and Cost Dual Output 5V to 24V Operation Phase/Direction Detection (option code B) Applications Direction Detector Speed Sensor Shaft Encoding Position Sensing Ordering Information Part No. MLX90224 MLX90224 Temperature Suffix E (-40°C to 85°C) E (-40°C to 85°C) Package Code VA VA Option code A B 1. Functional Diagram 1 Voltage Regulator Replaced with Logic for MLX90224 B 2. Description The MLX90224 series are dual Hall effect switches. It includes two Hall effect switch functions of which typical thresholds are +/- 2.0 mT. In each switch, 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 MLX90224LVAA output transistor will be “switched 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 “switched off” (BRP) in the presence of a North field. Spacing on the plates is 1.85mm. The MLX90224LVAB serie is designed for direction detection with a high speed chopper. 2 Chopper 4 Chopper 3 MLX90224EVA-A Pin 1 Pin 2 Pin 3 Pin 4 VDD Switch Plate 1 GND Switch Plate 2 MLX90224EVA-B VDD Speed GND Direction The output structure is an Open-Drain NMOS transistor with a capability of 25 mA. 3901090224 Rev. 005 Page 1 of 10 Data Sheet July/03 MLX90224 Dual Hall Effect Switch TABLE OF CONTENTS FEATURES AND BENEFITS ....................................................................................................................... 1 APPLICATIONS............................................................................................................................................ 1 ORDERING INFORMATION......................................................................................................................... 1 1. 2. 3. 4. 5. 6. 7. 8. 9. FUNCTIONAL DIAGRAM................................................................................................................... 1-1 DESCRIPTION.................................................................................................................................... 2-1 GLOSSARY OF TERMS ....................................................................................................................... 3 ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3 MLX90224 ELECTRICAL SPECIFICATIONS ...................................................................................... 3 MLX90224 SENSOR SPECIFIC SPECIFICATIONS ............................................................................ 4 GENERAL DESCRIPTION .................................................................................................................... 4 PERFORMANCE GRAPHS................................................................................................................... 5 APPLICATIONS INFORMATION .......................................................................................................... 6 10. RELIABILITY INFORMATION............................................................................................................... 8 11. ESD PRECAUTIONS............................................................................................................................. 8 12. PACKAGE INFORMATION................................................................................................................... 9 13. DISCLAIMER ....................................................................................................................................... 10 3901090224 Rev. 005 Page 2-2 of 10 Data Sheet July/03 MLX90224 Dual Hall Effect Switch 3. Glossary of Terms Gauss, Tesla: Two units to quantify a magnetic flux density. Conversion: 1 mT = 10 Gauss Bop: B Operating Point: When the magnetic flux density increases and reaches the Bop value, the output switches on. This value is in Gauss. Brp: B Release Point: When the magnetic flux density decreases and reaches the Brp value, the output switches off. This value is in Gauss. 4. Absolute Maximum Ratings Supply Voltage, VDD Supply Current, IDD Output Current, IOUT Output Short-Circuit Current Operating Temperature Range, TA Storage Temperature Range, TS Maximum Junction Temp, TJ Magnetic Flux Density 24 V 50 mA 40 mA 150 mA -40°C to 150°C -65°C to 150°C + 175°C Infinite Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. 5. MLX90224 Electrical Specifications DC Operating Parameters TA = -40oC to 85oC, VDD = 5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Supply Voltage Supply Current Output Current Saturation Output Voltage Output Voltage Output Leakage Refresh Time VDD IDD IOUT VSAT VOUT ILEAK Tr Operating B>BOP B>BOP, IOUT=20 mA B