MLX90254 Differential Dynamic Hall Effect Sensor Features and Benefits Differential hall sensor Low consumption Excellent repeatability performance Large airgap range Large supply voltage range Distance between Hall plates : 2.25 mm Applications Crankshaft sensor Camshaft sensor ABS sensor Gear tooth sensor Speed sensor Ordering Information Part No. MLX90254 Temperature Suffix L (-40°C to 150°C) Package Code VA (4 leads) 1. Functional Diagram 2. Description 2 Voltage Regulator 4 Filter S . ( B1 - B2 ) Filter 3 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). Its low hysteresis enables it to operate over a wide range of air gaps from -40°C to 150°C. The use of two Hall cells makes the operation sensitive to a rotation of the IC around its normal axis. The output structure is an Open-Drain NMOS transistor with a capability of 25 mA under 24V and protected against short-circuits. The IC is packaged in 4-SIP VA. Pin 1 – Not used Pin 2 – Vdd (Supply) Pin 3 – Vss (Ground) Pin 4 - Output 3901090254 Rev. 005 Page 1 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor TABLE OF CONTENTS FEATURES AND BENEFITS ....................................................................................................................... 1 APPLICATIONS............................................................................................................................................ 1 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 2 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 3. Glossary of Terms 1 mT = 10 Gauss: Flux density units. Pre-induction: the pre-induction is the magnetic field induced by the back bias magnet. Operating point: the value of the differential flux density when the transistor output turns ON. Release point: the value of the differential flux density when the transistor output turns OFF 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 Supply Voltage, VDD 24 V Reverse Voltage Protection -0.3 V Output Current, IOUT 25 mA Output Short-Circuit Current 150 mA Output Voltage 24 V Operating Temperature Range, TA -40 °C to 150°C Storage Temperature Range, TS -55 °C to 165°C Maximum Junction Temperature 175 °C Magnetic Flux Density Infinite Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum-rated conditions for extended periods may affect device reliability. 3901090254 Rev. 005 Page 3 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 5. MLX90254 Electrical Specifications o o DC Operating Parameters TA = -40 C to 150 C, VDD = 4V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Supply Voltage Vs 4 12 24 V Supply Current (1) Is 5 8.5 12 mA Output Voltage Vout Output state: OFF 24 V Output DC Current Iout Vout < 1V 25 mA Output Saturation Voltage Vsat Output state: ON Iout=25 mA 500 mV 70 mA Output Short-Circuit Current Iscprot Output state: ON Vout > 2V 10 45 Output Leakage Current Ileak Output state: OFF 10 µA Output Rise Time Tr Vout = 12 V 0.1 µs 0.5 µs 150 ms 30000 Hz Rpull-up = 600 Ω No Load Capacitor Output Fall Time Tf Vout = 4.5 .. 24 V Cload = 1 nF Rpull-up = 1 kΩ Startup Time (2) Tpower-on Frequency (3) f Supply Rise Time Tsr 15 Vs = 0 .. 24 V 100 ns (1) Supply current can rise-up to 20 mA 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. (3) The frequency is linked with the first order high pass filter with a cut-off frequency smaller than 20 Hz. 3901090254 Rev. 005 Page 4 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 6. MLX90254 Sensor Specific Specifications o o DC Operating Parameters TA = -40 C to 150 C, VDD = 4V to 24V (unless otherwise specified) Parameter Symbol Preinduction BDC Differential Induction(4) Test Conditions Min Typ Max Units -500 500 mT ∆BAC 6 100 mT Operating Point Bop -0.5 0 0.5 mT Release Point Brp -0.5 0 0.5 mT Positive margin M+ 0.5 2 3 mT Negative margin M- -3 -2 -0.5 mT Magnetic Hysteresis Bhyst 0 mT (4) The differential field must exceed 6 mT to 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. The difference between the two Hall signals is computed and amplified. The remaining DC offset is removed by the high-pass filter. The noise that is out of the signal bandwidth is attenuated by the lowpass filter in order to minimize the output jitter. The AC differential signal is compared to the Bop and Brp threshold and the result of that comparison commands the open drain output transistor. Output Voltage Vs the Angle 40 12 B1 B2 35 BAC OUT 30 10 8 20 15 6 10 4 5 Output Voltage (Volt) Magnetic Density Flux (mT) 25 0 1 2 3 4 5 6 7 8 9 10 2 -5 -10 0 -15 -20 -2 Angle (Degree) Figure 1: Output toggling according to the differential magnetic signal. 3901090254 Rev. 005 Page 5 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 8. Performance Graphs Jitter vs. Airgap 150 Deg.C 1.00 1.00 0.08 0.08 0.06 0.06 Jitter (degree) Jitter (degree) Jitter vs. Airgap 25 Deg.C 0.04 0.02 0 0.04 0.02 0 0.4 0.8 1.2 1.6 2.0 0 2.4 Airgap (mm) 3901090254 Rev. 005 0 0.4 0.8 1.2 1.6 2.0 2.4 Airgap (mm) Page 6 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 9. Reliability Information This Melexis device is classified and qualified regarding soldering technology, solderability and moisture sensitivity level, as defined in this specification, according to following test methods: IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification For Nonhermetic Solid State Surface Mount Devices (classification reflow profiles according to table 5-2) EIA/JEDEC JESD22-A113 Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing (reflow profiles according to table 2) CECC00802 Standard Method For The Specification of Surface Mounting Components (SMDs) of Assessed Quality EIA/JEDEC JESD22-B106 Resistance to soldering temperature for through-hole mounted devices EN60749-15 Resistance to soldering temperature for through-hole mounted devices MIL 883 Method 2003 / EIA/JEDEC JESD22-B102 Solderability For all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature profile etc) additional classification and qualification tests have to be agreed upon with Melexis. The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance of adhesive strength between device and board. Based on Melexis commitment to environmental responsibility, European legislation (Directive on the Restriction of the Use of Certain Hazardous substances, RoHS) and customer requests, Melexis has installed a Roadmap to qualify their package families for lead free processes also. Various lead free generic qualifications are running, current results on request. 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 Page 7 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 11. Package Information VA Package Dimensions 5.33 5.43 5.08 5.24 VA Hall Plate / Chip Location J 1.22 1.32 3.76 3.86 2.250 +/-0 0.387 4.50 A 4.10 45 o X 1mm 0.289 Hall Plates size: 0.20 x 0.20 B C 254BB ZZZZZ 5o 5o (2x) (2x) 2.95+/-0.15 0.387 0.289 3. 46 3 .79 3. 30 3 .63 Marked Surface D VA F All Dimensions in millimeters 0.94+/- 0.15 G 0.22 A 1.20 E 1.10 REF H 1.0 B MAX 1 2 3 0.66 0.61 4 C 0.29 0.24 10.0 D 45 o 11.0 E 0.31 0.18 F 0.60 0.40 0.45 0.35 G 0.35 0.25 H 0.15 0.0 J 45 o Notes: 1. Pinout: Not Used Pin 1 Pin 2 Vdd Pin 3 GND Pin 4 Output 2. Controlling dimension: mm . 3. Leads must be free of flash and plating voids. 4. Leads must not arc toward the rear of package. 5. Package dimensions exclude molding flash. 6. Tolerance: +/- 0.254 mm unless otherwise specified. 7. Marking: Line 1: 3 first digits (254) =Part Number MLX90254 = Version 2 last digit (BB) Line 2: 5 digits (ZZZZZ) =Lot Number Back Side Marking 4 digits (YYWW) =Date Code 3901090254 Rev. 005 Page 8 of 9 Datasheet Jun/04 MLX90254 Differential Dynamic Hall Effect Sensor 12. Disclaimer Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering of technical or other services. © 2002 Melexis NV. All rights reserved. For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: All other locations: Phone: +32 13 67 04 95 E-mail: [email protected] Phone: +1 603 223 2362 E-mail: [email protected] ISO/TS16949 and ISO14001 Certified 3901090254 Rev. 005 Page 9 of 9 Datasheet Jun/04