US5781 Unipolar Hall Switch - Mediu um Sensitivity Features and Benefits Application Exam mples Wide operating voltage range frrom 3.5V to 24V Medium sensitivity CMOS technology Chopper-stabilized amplifier stage tage Low current consumption Open drain output Thin SOT23 3L and flat TO-92 3L both RoHS Compliant packages Automotive, Consu umer and Industrial Solid-state switch Interrupter Current detector Proximity detection on Ordering Code Product Code US5781 US5781 US5781 US5781 US5781 Temperature Code E L E L L Legend: Temperature Code: Package Code SE SE UA UA UA Option Code AAA-000 AAA-000 AAA-000 AAA-000 AAA-000 Package Code: Packing Form: L for Temperature Range -40C to 150C E for Temperature Range -40C to 85C SE for or TSOT, UA for TO-92(Flat) TO BU for Bulk, CA for Ammopack Ordering example: US5781ESE US5781ESE-AAA-000-RE 1 Functional Diagram Packing Form Code RE RE BU BU CA 2 General Descriptio ion The Melexis US5781 is a unipolar Hall-effect switch designed in mixed ed signal CMOS technology. The device integrates a volltage regulator, Hall sensor with dynamic offset ccancellation system, Schmitt trigger and an open-d drain output driver, all in a single package. Thanks to its wide operating ng voltage range and extended choice of temperrature range, it is suitable for use in automot otive and solid state switch applications. The device is delivered in a Thin Small Outline Transistor (TSOT) for surface e mount process and in a Plastic Single In Line (TO O-92 flat) for throughhole mount. Both 3-lead packages are RoHS compliant. 3901005781 Rev 014 Page 1 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Medium Sensitivity Table of Contents 1 Functional Diagram ........................................................................................................ 1 2 General Description ........................................................................................................ 1 3 Glossary of Terms .......................................................................................................... 3 4 Absolute Maximum Ratings ........................................................................................... 3 5 Pin Definitions and Descriptions ................................................................................... 3 6 General Electrical Specifications .................................................................................. 4 7 Magnetic Specifications ................................................................................................. 4 8 Output Behaviour versus Magnetic Pole ...................................................................... 4 9 Detailed General Description ......................................................................................... 5 10 Unique Features ............................................................................................................ 5 11 Performance Graphs .................................................................................................... 6 11.1 Typical Magnetic Switch Points vs VDD ....................................................................................................6 11.2 Magnetic Switch Points vs Temperature .................................................................................................6 11.3 Typical Saturation Voltage vsTemperature (VDD=12V;Iout=20mA) .........................................................6 12 Application Information................................................................................................ 7 12.1 Typical Three-Wire Application Circuit ....................................................................................................7 12.2 Two-Wire Circuit ......................................................................................................................................7 12.3 Automotive and Harsh, Noisy Environments Three-Wire Circuit ............................................................7 13 Application Comments ................................................................................................. 7 14 Standard information regarding manufacturability of Melexis products with different soldering processes........................................................................................... 8 15 ESD Precautions ........................................................................................................... 8 16 Package Information..................................................................................................... 9 16.1 SE Package (TSOT-3L)...........................................................................................................................9 16.2 UA Package (TO-92 flat) .......................................................................................................................10 17 Disclaimer.................................................................................................................... 11 3901005781 Rev 014 Page 2 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Medium Sensitivity 3 Glossary of Terms MilliTesla (mT), Gauss RoHS TSOT ESD BLDC Units of magnetic flux density: 1mT = 10 Gauss Restriction of Hazardous Substances Thin Small Outline Transistor (TSOT package) - also referred with the Melexis package code "SE" Electro-Static Discharge Brush-Less Direct-Current 4 Absolute Maximum Ratings Parameter Symbol Supply Voltage VDD Supply Current IDD Output Voltage VOUT Output Current IOUT Storage Temperature Range TS Maximum Junction Temperature TJ Table 1: Absolute maximum ratings Value 28 50 28 50 -50 to 150 165 Units V mA V mA C C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximumrated conditions for extended periods may affect device reliability. Operating Temperature Range Temperature Suffix "E" Temperature Suffix "L" Symbol TA TA Value -40 to 85 -40 to 150 Units C C 5 Pin Definitions and Descriptions SE Pin UA Pin Name 1 1 VDD 2 3 OUT 3 2 GND Table 2: Pin definitions and descriptions SE package 3901005781 Rev 014 Type Supply Output Ground Function Supply Voltage pin Open Drain Output pin Ground pin UA package Page 3 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Medium Sensitivity 6 General Electrical Specifications DC Operating Parameters T A = 25oC, VDD Parameter Symbol Supply Voltage VDD Supply Current IDD Output Saturation Voltage VDSon Output Leakage Current IOFF Output Rise Time tr Output Fall Time tf Maximum Switching Frequency FSW SE Package Thermal Resistance RTH UA Package Thermal Resistance RTH Table 3: Electrical specifications = 12V (unless otherwise specified) Test Conditions Min Operating 3.5 B < BRP 0.5 IOUT = 20mA, B > BOP B < BRP, VOUT = 24V RL = 1k, CL = 20pF RL = 1k, CL = 20pF Single layer (1S) Jedec board Typ 2.5 0.3 0.01 0.25 0.25 10 301 200 Max 24 5 0.5 10 Units V mA V A s s KHz C/W C/W 7 Magnetic Specifications DC Operating Parameters T A = 25oC, VDD = 12V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Operating Point BOP 7 12 Release Point BRP 3.5 7.5 Hysteresis BHYST 2 5 Table 4: Magnetic specifications Max 15 10 7 Units mT mT mT 8 Output Behaviour versus Magnetic Pole DC Operating Parameters TA = -40 oC to 150 oC, VDD = 3.5V to 24V (unless otherwise specified) Parameter Test Conditions (SE) OUT (SE) OUT (UA) South pole B > BOP High Low Null or weak magnetic field B -7 0 or B < BRP High High North pole B > BOP Low High Table 5: Output behaviour versus magnetic pole North pole South pole OUT = low (VDSon) SE package 3901005781 Rev 014 OUT = low (VDSon) UA package Page 4 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Mediu um Sensitivity 9 Detailed General Descri ription Based on mixed signal CMOS technology, Melexis US5781 is a Hall-effect device with med edium magnetic sensitivity. Its sensitivity enables high accuracy in position sensing by the use of small air g gap. The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall sensors and amplifiers. The CMOS CM technology makes this advanced technique possible po and contributes to smaller chip size and lo ower current consumption than bipolar technology. The he small chip size is also an important factor to minimize th he effect of physical stress. This combination results in more stablle magnetic characteristics and enables faster and more m precise design. The wide operating voltage from 3.5V to 24V, "L" and "E" operating temperature range and d low current consumption make this device especia ally suitable for automotive and solid state switch app plications. The output signal is open-drain type. Such S output allows simple connectivity with TTL or CMOS CM logic by using a pull-up resistor tied between a pull-u up voltage and the device output. 10 Unique Features The US5781 exhibits unipolar magnet agnetic switching characteristics. Therefore, it operates on nly with one magnetic pole. The UA package is south pole active: Applying a south magnetic pole greater than BOP facing the branded side of the package switches the outp put low. The SE package is north pole active: Applying a north magnetic pole greater than BOP facing the branded side of the package switches the outp put low. Unipolar switch characteristic Removing the magnetic field (B0) switches the output high. The use of the opposite magnetic pole facing the branded side does not affect the output state. A magnetic hysteresis BHYST keeps BOP and BRP separated by a minimal value. This hysterresis prevents output oscillation near the switching point. po 3901005781 Rev 014 Page 5 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Mediu um Sensitivity 11 Performance Graphs 11.1 Typical Magnetic Switch h Points vs VDD 11.3 Typical Saturation vsTemperature (VDD=12V;Iout=20mA) 3901005781 Rev 014 11.2 Magnetic Switch Temperature Points vs Voltage Page 6 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Mediu um Sensitivity 12 Application Informatio on 12.1 Typical Three-Wire Applica lication Circuit 12.2 Two-Wire re Circuit 12.3 Automotive and Harsh, Noisy No Environments Three-Wire Circuit Note: With this circuit, p precise ON and OFF currents can be de detected using only two connecting wiires. The resistors RL and a Rb can be used to bias the input ccurrent. Refer to the part specifications ons for limiting values. BRP : BOP : IOFF = IR + IDD = VDD/Rb + IDD ION = IOFF + IOUT = IOFF + VDD/RL 13 Application Comments ts For proper operation, a 100nF bypass s capacitor should be placed as close as possible to tthe device between the VDD and ground pin. For reverse voltage protection, it is rec commended to connect a resistor or a diode in series es with the VDD pin. When using a resistor, three points are e important: - the resistor has to limit the re everse current to 50mA maximum (VCC / R1 50mA)) - the resulting device supply voltage v VDD has to be higher than VDD min (VDD = VCCC - R1.IDD) - the resistor has to withstand nd the power dissipated in reverse voltage condition (P PD = VCC 2 / R1) When using a diode, a reverse current ent cannot flow and the voltage drop is almost constant tant (0.7V). Therefore, a 100/0.25W resistor for 5V application and a diode for higher supply voltage e are recommended. Both solutions provide the required revverse voltage protection. When a weak power supply is used or when the device is intended to be used in noisy envi vironment, it is recommended that figure 13.3 from om the Application Information section is used. The low-pass filter formed by R1 and C1 C and the zener diode Z1 bypass the disturbances or voltage spikes occurring on the device supply voltage age VDD. The diode D1 provides additional reverse volta tage protection. 3901005781 Rev 014 Page 7 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Medium Sensitivity 14 Standard information regarding manufacturability of Melexis products with different soldering processes Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity level according to following test methods: Reflow Soldering SMD's (Surface Mount Devices) * * 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) Wave Soldering SMD's (Surface Mount Devices) and THD's (Through Hole Devices) * * EN60749-20 Resistance of plastic- encapsulated SMD's to combined effect of moisture and soldering heat EIA/JEDEC JESD22-B106 and EN60749-15 Resistance to soldering temperature for through-hole mounted devices Iron Soldering THD's (Through Hole Devices) * EN60749-15 Resistance to soldering temperature for through-hole mounted devices Solderability SMD's (Surface Mount Devices) and THD's (Through Hole Devices) * EIA/JEDEC JESD22-B102 and EN60749-21 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. Melexis is contributing to global environmental conservation by promoting lead free solutions. For more information on qualifications of RoHS compliant products (RoHS = European directive on the Restriction Of the use of certain Hazardous Substances) please visit the quality page on our website: http://www.melexis.com/quality.aspx 15 ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 3901005781 Rev 014 Page 8 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Mediu um Sensitivity 16 Package Information 0.127 +0.023 - 0.007 0.891 +/-0.05 0.20 0.15 0.20 1.90 BSC 0.30 0.45 0.95 BSC see note 3 2.90 BSC 16.1 SE Package (TSOT-3L) 3901005781 Rev 014 Page 9 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Mediu um Sensitivity 14.5+/-0.5 2.5 min see note 4 1.65+/-0.10 3.00+/-0.20 16.2 UA Package (TO-92 flat) 3901005781 Rev 014 Page 10 of 11 Data Sheet Mar/12 US5781 Unipolar Hall Switch - Medium Sensitivity 17 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. (c) 2012 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, Africa, Asia: Phone: +32 1367 0495 E-mail: sales_europe@melexis.com America: Phone: +1 248 306 5400 E-mail: sales_usa@melexis.com ISO/TS 16949 and ISO14001 Certified 3901005781 Rev 014 Page 11 of 11 Data Sheet Mar/12