MLX90217 Hall-Effect Cam Sensor Features and Benefits ■ ■ ■ ■ ■ ■ ■ ■ Rotary Position Gear Tooth Sensor Short Circuit Protection On-chip 10 bit A/D Converter Self-Adjusting Magnetic Range High Speed Operation No Chopper Delay Zero Speed Detection No Rotary Orientation Concerns Applications ■ ■ ■ ■ ■ Camshaft Sensor Geartooth Sensor Linear Encoder Rotary Encoder Direction Detection* *See applications example Ordering Information Part No. MLX90217 Temperature Suffix L (-40oC to 150oC) Functional Diagram Description Hall Plate 10-Bit ADC 4-Bit ADC Amplifier Voltage Regulator Protected Output 2 3 Pin 1 - VDD (Supply) Pin 2 - VSS (Ground) Pin 3 - Output Note: Static precautions. 3901090217 Rev. 009 sensitive device, please observe The MLX90217 is a self adjusting digital output rotary position gear tooth sensor designed for use in automotive camshaft sensing as well as other speed sensing applications. It is designed to be used with a bias magnet south facing the back (non-marked) side of the IC. The device has an open collector output which is short circuit protected. The MLX90217 is a sophisticated IC featuring an on-chip 10-bit A/D Converter and logic that acts as a digital sample and hold circuit. A separate 4bit A/D converter provides a fixed hysteresis. The 90217 does not have a chopper delay. The 90217 uses a single Hall plate which is immune to rotary alignment problems. The bias magnet can be from 50 to 400mT. Logic 1 Package Code UA (TO-92 flat) ESD As the signal is sampled, the logic recognizes an increasing or decreasing flux density. The output will turn on (BOP) after the flux has reached its peak and decreased by an amount equal to the hysteresis. Similarly the output will turn off (BOP) after the flux has reached its minimum value and increased by an amount equal to the hysteresis. Page 1 Jun/04 MLX90217 Hall-Effect Cam Sensor MLX90217 Electrical Specifications DC Operating Parameters TA = -40oC to 150oC, VDD = 3.5V to 24V (unless otherwise specified). Parameter Symbol Test Conditions Min Typ Max Units Supply Voltage VDD Operating 3.5 - 24 V Supply Current IDD VDD = 12V 1.5 3.0 4.5 mA Supply Current IDD VDD = 3.5V to 24V 1 - 6 mA Leakage Current ILEAK VOUT = 3.5V to 24V - - 10 µA Output Current IOUT Operating - - 25 mA Output Saturation Voltage VSAT VDD = 12V, IOUT = 25mA - - 600 mV Output Short Circuit Current IFAULT Fault 50 100 150 mA Output Short Circuit Shutdown TFAULT Fault 100 - 200 µS Clock Frequency fCLK Operating 300 500 800 kHz Output Rise Time tr VDD=12V R1 = 880W C1 = 20pf - 400 nS Output Fall Time tf VDD=12V R1 = 880W C1 = 20pf - 400 nS Bandwidth BW Operating - - 15 kHz Thermal Resistance RTH Operating - - 200 oC/Watt MLX90217 Magnetic Specifications DC Operating Parameters TA = -40oC to 150oC, VDD = 3.5V to 24V (Unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Back Bias Range BBIAS Operating -30 - 400 mT VDD = 12V 50 - 500 mT VDD = 3.5V to 24V 1.8 3.5 10 mT Linear Region Hysteresis Bhys Notes: 1mT=10Gauss Page 2 Jun/04 j 3901090217 Rev. 009 MLX90217 Hall-Effect Cam Sensor Performance Graphs Absolute Maximum Ratings Supply Voltage (Operating), VDD Supply Current (Fault), IDD 50mA Output Current (Fault), IOUT 30mA Output Current (Fault), Ifault 50mA Output Voltage, VOUT 30V Power Dissipation, PD 100mW Operating Temperature Range, TA - 40°C to 150°C Storage Temperature Range, TS - 65°C to 150°C Maximun Junction Temp, TJ 3901090217 Rev. 009 30V Page 3 175°C Jun/04 MLX90217 Hall-Effect Cam Sensor Application Notes Maximum dynamic range is 500 mT. The hysteresis is fixed at 5.0 mT. Best angular accuracy will be obtained when the magnetic circuit provides peak magnetic flux at the chip near the high end of the linear range of 500 mT. EMC protection using external components are recommended. Two possibilities are shown on the following page. Normally the South pole faces the unbranded side of the device. A North pole will enable a test sequence used in factory testing. Unique Features The output is reset to the high state at power on (output driver is off) whatever the field is. The output only changes after the first min is detected. The reset state holds no information about the field. If the supply of the chip is raised slowly, the reset state is not stable. This has been observed at 0 field but it should be the same with small and large fields. Gear tooth sensors often need to be adjusted after the module is assembled to align the magnet with differential Hall plates or orient with teeth. However the MLX90217 is “self adjusting” over a wide range of back bias flux eliminating the need for any trimming in the application. The magnet may be glued to the back surface (non branded side) of the IC using a cyanoacrylate adhesive or suitable epoxy. Page 4 Jun/04 j 3901090217 Rev. 009 MLX90217 Hall-Effect Cam Sensor Applications Examples 3901090217 Rev. 009 Page 5 Jun/04 MLX90217 Hall-Effect Cam Sensor Physical Characteristics Page 6 Jun/04 j 3901090217 Rev. 009 MLX90217 Hall-Effect Cam Sensor 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 ESD Procautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901090217 Rev. 009 Page 7 Jun/04 MLX90217 Hall-Effect Cam Sensor 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 Page 8 Jun/04 j 3901090217 Rev. 009