TLE4927x Dynamic Differential Hall Effect Sensor TLE4927C E6547 TLE4927CB E6547 Product Information 2013-10-03 Sense & Control TLE4927x Dynamic Differential Hall Effect Sensor Table of Contents Table of Contents Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 1.1 1.2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Target Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 2.1 2.2 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Sensor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 3.1 3.2 3.3 3.4 3.5 3.6 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Magnetic Characteristics in Running Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reference Target Wheel - TLE4927CB E6547 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.1 4.2 4.3 4.4 4.5 4.6 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Gear Tooth Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Package Information - TLE4927C E6547 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Package Outline - TLE4927CB E6547 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Back-bias field orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Packing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Product Information 2 5 5 5 5 6 6 6 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor General 1 General 1.1 Target Application The TLE4927C E6547 is an active Hall sensor suited to detecting the motion and position of ferromagnetic or permanent magnet targets. An additional self-calibration module is implemented to achieve optimum accuracy during normal running operation. The device comes in a 3-pin package providing pins for the supply voltage and an open drain output. Infineon also offers customers the possibility to purchase sensors with already attached back bias magnets (TLE4927CB E6547). 1.2 • • • • • • • • • • • • • • • • • Features High sensitivity Single chip solution Symmetrical thresholds High resistance to Piezo effects South and north pole pre-induction possible Low cut-off frequency Digital output signal Advanced performance through dynamic self calibration principle Two-wire and three-wire configuration possible Wide operating temperature range Fast start-up time Large operating air gaps Reverse voltage protection on VS pin Short-circuit and overtemperature protection of output Digital output signal (voltage interface) Integrated back bias magnet as an option Module style package with two integrated capacitors: – 4.7 nF between Q and GND – 47 nF between VS and GND: Needed for micro cuts in power supply Type Order Code Marking Package TLE4927C E6547 SP000718266 27D8 PG-SSO-3-92 TLE4927CB E6547 SP000913548 927D00 PSG-SSO-3-11 Product Information 3 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Functional Description 2 Functional Description 2.1 General The differential Hall sensor IC detects the motion and position of ferromagnetic and permanent magnet structures by measuring the differential flux density of the magnetic field. To detect ferromagnetic objects the magnetic field must be provided by a back biasing permanent magnet (south or north pole of the magnet attached to the rear unmarked side of the IC package). Offset cancellation is achieved by advanced digital signal processing. Immediately after power-on, motion is detected (start-up mode). After a few transitions, the sensor has finished self-calibration and switches to a high accuracy mode (running mode). In running mode, switching occurs at the zero crossing points of the magnetic signal. This zero crossing is found by calculating the arithmetic mean of the maximum and minimum value of the magnetic differential signal (∆B). ∆B is defined as the field difference between Hall plate 1 and Hall plate 2. See Figure 2-2. 2.2 Sensor assembly Sensor and back bias magnet can be applied in the following ways: S N N S S N N S S N GYYWW S 0015 S 0015 4952 123456 GYYWW S 0015 4952 4952 123456 N S Vs GND Q Vs GND GYYWW S 0015 S 0015 4952 4952 4952 123456 S N N S Q Vs GND S N Q Figure 2-1 Sensor assembly S (N) N (S) Pin 3 (Q) Pin 1 (Vs) B2 B1 Branded side Crankshaft Wheel Profile Small air gap Magnetic field difference ?B = B1 – B2 Large airgap ? BENOP Hidden Adaptive Hidden Hysteresis adaptive hysteresis Enabling point for releasing output: B1 – B2 < ? BENRP. Next zero crossing switches the output OFF (VQ = HIGH). Enabling point for operating point: B1 – B2 > ? BENOP. Next zero crossing switches the output ON (VQ = LOW). ? BHYS = |? BENOP ‐ ? BENRP| The magnetic induction (=flux density) around a permanent magnet points from the north pole to the south pole. It is usual to define positive flux when the south pole of a magnet is on the branded side of the IC. This is equivalent to the north pole of the magnet being on the rear of the IC: ? BENRP Output Signal VQ Figure 2-2 System operation with hidden adaptive hysteresis Product Information 4 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Specification 3 Specification 3.1 Operating Range Table 3-1 Operating Range Parameter Symbol Values Min. Typ. Unit Note / Test Condition time limited with RSeries ≥ 200 Ω Max. Supply voltage VS 3.2 26 V Continuous output OFF voltage VQ 0 18 V Continuous output ON current IQ 0 20 mA VQmax = 0.6 V Operating junction temperature TJ -40 175 °C time limited Unit Note / Test Condition 6.8 mA – Output saturation voltage VQsat 0.25 V IQ = 20 mA Output rise time tr 12 µs VLoad= 4.5 to 24 V RLoad = 1.2 kΩ CLoad = 4.7 nF included in package. Output fall time tf 0.9 µs VLoad= 5 V RLoad = 1.2 kΩ CLoad = 4.7 nF included in package. 3.2 Electrical Characteristics Table 3-2 Electrical Characteristics Parameter Symbol Values Min. Supply current IS Typ. Max. µs Delay time td 12.5 Frequency range f – 3.3 ESD Protection Table 3-3 ESD Protection Parameter ESD Protection PG-SSO-3-92 Product Information Symbol VESD µs 8 Values Min. Typ. Max. – – ±6 5 kHz Unit Note / Test Condition kV According to standard EIA/JESD22A114-B Human Body Model (HBM 1500 Ω / 100 pF). 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Specification 3.4 Magnetic Characteristics in Running Mode Table 3-4 Magnetic Characteristics in Running Mode Parameter Symbol Values Min. Minimum signal amplitude Typ. |∆Bmin| Operating Characteristics Table 3-5 Operating Range - TLE4927CB E6547 Parameter Symbol Values min Operational airgap AG Phase jitter ϕ jitter 3.6 Note / Test Condition mT – Max. 0.75 3.5 Unit typ Unit Remarks mm Valid in running mode, measured from sensor housing (branded side) to target tooth. Valid at 25°C & 0h. No missing output pulses. °crank Output falling edge 360° repeatability, 1000 rotations, 3 sigma value, min. input signal size 10 mTpp max 0.5 0.035 Reference Target Wheel - TLE4927CB E6547 Z Z X Y Figure 3-1 Reference target wheel Product Information 6 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Package Information Table 3-6 Reference target wheel geometry Parameter Symbol Typ value Unit Outside diameter d 150 mm Number of teeth Z 60 - 50:50 % Pitch Ratio Material Remarks ST37 4 Package Information 4.1 Application Example 3-Wire Application RP RP Line VS RL 1 VS 4.7 nF* Q 3 GND 2 VSIGNAL 4.7 nF* Sensor For example: Mainframe RL = 1.2 kΩ RP = 200Ω Figure 4-1 TLE4927C E6547 Application Circuits (*capacitors included in package) 4.2 Gear Tooth Sensing In the case of ferromagnetic toothed wheel applications, the IC must be biased by the south or north pole of a permanent magnet which should cover both Hall probes (e.g. a SmCO5 magnet (Vacuumschmelze VX145) with dimensions 8 mm x 5 mm x 3 mm). The maximum air gap depends on: • • The magnetic field strength (magnet used; pre-induction). The toothed wheel that is used (dimensions, material, etc.; resulting differential field). a b L Centered distance of Hall probes Hall probes to IC surface IC surface to tooth wheel a = 2.5 mm b = 0.3 mm Figure 4-2 Sensor Spacing Product Information 7 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Package Information Conversion DIN – ASA m = 25.4 mm/p T = 25.4 mm CP DIN d z m T diameter (mm) number of teeth module m = d/z (mm) pitch T = π x m (mm) ASA p PD CP diameter pitch p = z/d (inch) pitch diameter PD = z/p (inch) circular pitch CP = 1 inch x π/p Figure 4-3 Toothed Wheel Dimensions 4.3 Package Information - TLE4927C E6547 Figure 4-4 Hall Probe Spacing in PG-SSO-3-92 Package Figure 4-5 Tape Loading Orientation in PG-SSO-3-92 Package Product Information 8 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Package Information Figure 4-6 Package Dimensions of PG-SSO-3-92 (Plastic Green Single Small Outline) Product Information 9 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Package Information 4.4 Package Outline - TLE4927CB E6547 Figure 4-7 PG-SSOM-3-11 package outline 4.5 Back-bias field orientation N S South Pole Biasing Figure 4-8 Back-bias field orientation Product Information 10 2013-10-03 TLE4927x Dynamic Differential Hall Effect Sensor Package Information 4.6 Packing Information Figure 4-9 PG-SSOM-3-11 blister tape packing information For additional packages information, sort of packing and others, please see Infineon internet web page: http://www.infineon.com/products Edition 2013-10-03 Published by Infineon Technologies AG 81726 Munich, Germany © 2014 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. Product Information 11 2013-10-03 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG