TLE4976-2K Hall Effect Switch with Current Interface Data Sheet Rev. 1.2, 2010-08-05 Sense & Control Edition 2010-08-05 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. TLE4976-2K TLE4976-2K Revision History: 2010-08-05, Rev. 1.2 Previous Version: 1.1 10 Magnetic paramters Bop, Brp adjusted We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: [email protected] Data Sheet 1 Rev. 1.2, 2010-08-05 TLE4976-2K Table of Contents Table of Contents 1 1.1 1.2 1.3 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Target Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 3 3 2 2.1 2.2 2.3 2.4 2.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Configuration (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 4 4 5 5 3 3.1 3.2 3.3 3.4 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical and Magnetic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 8 8 9 4 4.1 4.2 4.3 4.4 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package Outline SC59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Distance between Chip and Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Sheet 2 11 11 12 13 13 Rev. 1.2, 2010-08-05 Hall Effect Switch TLE4976-2K Hall Effect Switch 1 Product Description 1.1 Overview The TLE4976-2K is a high precision unipolar Hall switch with a two wire, 6mA/14mA current interface in a SMD package. A chopped measurement principle provides high stability switching thresholds for operating temperatures between -40°C and 150°C. 1.2 • • • • • • • • • • • Features 3.0V to 26V supply voltage operation High sensitivity and high stability of the magnetic switching points High resistance to mechanical stress by Active Error Compensation Reverse battery protection (-18V) Superior temperature stability Peak temperatures up to 195°C without damage Low jitter (typ. 1µs) High ESD performance (± 8kV HBM) Digital output signal with current modulation 6 / 14mA Unipolar version SMD package SC59 (SOT23 compatible) 1.3 Target Applications The sensor targets all applications where a high precision unipolar magnetic switch is required (e.g. position sensing). Due to the current interface the number of wires required in the application is minimized thus saving costs and increasing reliability. This is specially helpful in all applications where the microcontroller is not on the same PCB as the Hall switch but in some distance. Product Name Product Type Ordering Code Package TLE4976-2K Hall Effect Switch SP000505028 SC59 Data Sheet 3 Rev. 1.2, 2010-08-05 TLE4976-2K Functional Description 2 Functional Description 2.1 General The TLE4976-2K is an integrated circuit Hall-effect sensor designed specifically for highly accurate applications. Precise magnetic switching thresholds and high temperature stability are achieved by active error compensation circuits and chopper techniques on the chip. The IC has a current interface with a 6mA / 14mA output. A magnetic south pole (positive field) with strength above Brp turns the output to low (6mA) and a magnetic field with strength below Bop turns it to high (14mA). 2.2 Pin Configuration (top view) Center of Sensitive Area 3 0.8 1 1.5 ± 0.15 2 ± 0.15 SC59 Figure 1 Pin Configuration and Center of Sensitive Area 2.3 Pin Description Table 1 Pin Description Pin No. Symbol Function 1 VS Supply voltage 2 N.C. No internal connection 3 GND Ground Data Sheet Comment 4 Rev. 1.2, 2010-08-05 TLE4976-2K Functional Description 2.4 Block Diagram VS Voltage Regulator reverse polarity protected Bias and Compensation Circuits Oscillator and Sequencer 8 mA Ref Amplifier Chopped Hall Probe Figure 2 Functional Block Diagram 2.5 Functional Block Description Low Pass Filter Comparator with Hysteresis The chopped Hall IC Switch comprises a Hall probe, bias generator, compensation circuits, oscillator and output transistor. The bias generator provides currents for the Hall probe and the active circuits. Compensation circuits stabilize the temperature behavior and reduce technology variations. The Active Error Compensation rejects offsets in signal stages and the influence of mechanical stress to the Hall probe caused by molding and soldering processes and other thermal stresses in the package. This chopper technique together with the threshold generator and the comparator ensure high accurate magnetic switching points. The current consumption depends on the switching status. Data Sheet 5 Rev. 1.2, 2010-08-05 TLE4976-2K Functional Description B rp Applied Magnetic Field B op td td tf IS tr 90% 10% Figure 3 Timing Diagram IS ISHIGH ISLOW 0 Figure 4 Data Sheet Bop Brp B Output Signal 6 Rev. 1.2, 2010-08-05 TLE4976-2K Specification 3 Specification 3.1 Application Circuit The advantage of the current interface is, that only two wires are necessary to connect the sensor. At least one series resistor is required to convert the two output states of the Hall sensor from current consumption to a voltage information. A typical value for RL is 100Ω. This gives a typical signal voltage level VSIG = 0.8V in the Off state and 1.4V in the On state. If the sensor is operated in an application environment with disturbances on the supply line, an additional series resistor RS is recommended. The maximum value for the series resistor RS can be calculated using the following formula: V Supplymin – V Smin R Smax = --------------------------------------------- – R L I Shighmax VS_min is the minimal supply voltage which might occur due to disturbances on the supply line VS. Example: VSupplymin = 6V; VSmin = 3V; RL = 100Ω; IShighmax = 17mA : RSmax = 76.5Ω V Supply RS VS 4.7 nF µC TLE 4976-2K GND VSIG Input RL µC GND Figure 5 Data Sheet Application Circuit 7 Rev. 1.2, 2010-08-05 TLE4976-2K Specification 3.2 Absolute Maximum Ratings Table 2 Absolute Maximum Rating Parameters Parameter Symbol Supply voltage VS Limit Values Unit Min. Max. – 18 – 18 – 18 18 24 26 V Note / Test Condition for 1h, RS+RL > 75Ω for 5min, RS+RL > 75Ω Supply current through protection device IS – 50 +50 mA Junction temperature Tj – – – – 155 165 175 195 °C °C Storage temperature TS – 40 150 Magnetic flux density B – unlimited mT for 2000h (not additive) for 1000h (not additive) for 168h (not additive) for 3 x 1h (additive) Attention: Stresses above the max. values listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. Table 3 ESD Protection1) Parameter Symbol Limit Values Min. ESD Voltage VESD Unit Note / Test Condition kV HBM, R = 1.5kΩ, C = 100pF TA = 25°C Max. ±8 1) Human Body Model (HBM) tests according to: EOS/ESD Association Standard S5.1-1993 and Mil. Std. 883D method 3015.7 3.3 Operating Range The following operating conditions must not be exceeded in order to ensure correct operation of the Hall Effect Switch. All parameters specified in the following sections refer to these operating conditions unless otherwise mentioned. Table 4 Operating Conditions Parameters Parameter Symbol Values Min. Supply voltage Junction temperature VS Tj Typ. Unit Max. 3 18 3 24 - 40 150 175 Data Sheet 8 Note / Test Condition V for 5 min, RS+RL > 100Ω °C for 168h Rev. 1.2, 2010-08-05 TLE4976-2K Specification 3.4 Electrical and Magnetic Characteristics Product characteristics involve the spread of values guaranteed within the specified voltage and ambient temperature range. Typical characteristics are the median of the production. General Electrical Characteristics1) Table 5 Parameter Symbol Values Min. Typ. Max. Unit Note / Test Condition Supply current low ISLOW 5 6 7 mA B > BRP VS = 3V ... 18V Supply current high ISHiGH 12 14 17 mA B < BOP VS = 3V ... 18V Reverse current ISR – 0.2 mA VS = -18V Output fall time tf – 0.4 1.6 µs RS = 100Ω Output rise time tr – 0.4 1.6 µs Chopper frequency fOSC – 320 Switching freq. fSW Delay time 3) 4) Output jitter Power-on time5) 6) Thermal resistance – kHz 152) kHz td – 13 µs tQJ – 1 – µsRMS Typical value for square wave signal 1kHz tPON – 13 – µs VS ≥ 3.0V RthJA – 100 – K/W SC59 1) over operating range, unless otherwise specified. Typical values correspond to VS = 12V and TA = 25°C 2) To operate the sensor at the max. switching frequency, the value of the magnetic signal amplitude must be 1.4 times higher than for static fields. This is due to the - 3dB corner frequency of the low pass filter in the signal path 3) Systematic delay between magnetic threshold reached and output switching 4) Jitter is the unpredictable deviation of the output switching delay 5) Time from applying VS ≥ 3.0V to the sensor until the output state is valid 6) Thermal resistance from junction to ambient Calculation of the ambient temperature: e.g. for VS = 12.0V, RS = 100W, ISHIGHtyp = 14mA : Power Dissipation: PDIS = 148.4mW. In TA = Tj – (RthJA x PDIS) = 175°C – (100K/W x 0.15W) Resulting max. ambient temperature: TA = 160°C Data Sheet 9 Rev. 1.2, 2010-08-05 TLE4976-2K Specification Table 6 Magnetic Characteristics1) Parameter Symbol Operating point BOP Release point BRP Values Unit Min. Typ. Max. 0.53 2.9 5.1 0.5 2.7 4.8 0.47 2.5 4.5 2.1 4.8 6.4 2 4.5 6 Note / Test Condition mT mT 1.9 4.2 5.6 Hysteresis BHYS 0.5 1.8 3 mT Temperature compensation of magnetic thresholds TC - -1000 - ppm/K Repeatability of magnetic thresholds2) BREP - 40 - µTRMS fot T = 25°C Typ. value for ΔB / Δt > 12 mT/ms 1) over operating range, unless otherwise specified. Typical values correspond to VS = 12 V. 2) BREP is equivalent to the noise constant Field Direction Definition Positive magnetic fields are defined with the south pole of the magnet to the branded side of package. N S Branded Side Figure 6 Data Sheet Definition of magnetic field direction 10 Rev. 1.2, 2010-08-05 TLE4976-2K Package Information 4 Package Information 4.1 Package Outline SC59 1.1 ±0.1 3 ±0.1 0.1 0.2 2.8 +0.2 -0.1 3 1 0.45 ±0.15 0.1 M +0.1 1.6 +0.15 -0.3 3x0.4 +0.05 -0.1 0.15 MAX. 2 0.1 M 0.95 0.95 (0.55) +0.1 0.15 -0 .05 0˚...8˚ MAX. GPS09473 Figure 7 Data Sheet SC59 Package Outline (All dimensions in mm) 11 Rev. 1.2, 2010-08-05 TLE4976-2K Package Information 4.2 Footprint 0.8 1.4 min 0.9 1.6 1.3 0.9 1.4 min 0.8 1.2 0.8 1.2 0.8 Wave Soldering Reflow Soldering Figure 8 Data Sheet Footprint SC59 12 Rev. 1.2, 2010-08-05 TLE4976-2K Package Information 4.3 Distance between Chip and Package d Branded Side d: Distance chip to upper side of IC d = 0.56 ±0.1 mm Figure 9 Distance between chip and package 4.4 Package Marking ym 7606 2 Figure 10 Data Sheet Year (y) = 0...9 Month (m) = 1...9, O - October N - November D - December Marking of TLE4976-2K 13 Rev. 1.2, 2010-08-05 www.infineon.com Published by Infineon Technologies AG