Data Sheet, V 1.1, January 2008 TLE4921-5U Dynamic Differential Hall Effect Sensor IC Sensors N e v e r s t o p t h i n k i n g . Edition 2008-01 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 München, Germany © Infineon Technologies AG 2008. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. 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TLE4921-5U Revision History: 2008-01 Previous Version: V1.0 V 1.1 Page Subjects (major changes since last revision) 5 Ordering Code changed 11 “Output leakage current” unit corrected 20 Figures “Delay Time between Switching Threshold” exchanged and corrected 21 Figure “Delay Time versus Differential Field” corrected 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] Template: mc_a5_ds_tmplt.fm / 4 / 2004-09-15 TLE4921-5U Table of Contents Page 1 1.1 1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin Configuration (view on branded side of component) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 2.1 2.2 2.3 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Description (see Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 Electrical and Magnetic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 Application Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7 Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Data Sheet 4 7 7 8 8 V 1.1, 2008-01 Dynamic Differential Hall Effect Sensor IC TLE4921-5U Bipolar IC 1 Overview 1.1 Features • • • • • • • • • • • • • • • Advanced performance High sensitivity Symmetrical thresholds High piezo resistivity Reduced power consumption South and north pole pre-induction possible AC coupled Digital output signal Two-wire and three-wire configuration possible Large temperature range Large airgap Low cut-off frequency Protection against overvoltage Protection against reversed polarity Output protection against electrical disturbances The differential Hall Effect sensor TLE4921-5U provides a high sensitivity and a superior stability over temperature and symmetrical thresholds in order to achieve a stable duty cycle. TLE4921-5U is particularly suitable for rotational speed detection and timing applications of ferromagnetic toothed wheels such as anti-lock braking systems, transmissions, crankshafts, etc. The integrated circuit (based on Hall effect) provides a digital signal output with frequency proportional to the speed of rotation. Unlike other rotational sensors differential Hall ICs are not influenced by radial vibration within the effective airgap of the sensor and require no external signal processing. Type Marking Ordering Code Package TLE4921-5U 215U SP000013593 PG-SSO-4-1 Data Sheet 5 V 1.1, 2008-01 TLE4921-5U Overview 1.2 Pin Configuration (view on branded side of component) B 2.67 2.5 A 0.2 B 1.53 Center of sensitive area 1 2 VS Q GND C 4 0.2 A 3 AEP01694 Figure 1 Table 1 Pin Definitions and Functions Pin No. Symbol Function 1 VS Supply voltage 2 Q Output 3 GND Ground 4 C Capacitor Data Sheet 6 V 1.1, 2008-01 TLE4921-5U General 2 General 2.1 Block Diagram VS 1 Protection Device Internal Reference and Supply VREG (3V) Hall-Probes Amplifier HighpassFilter 3 Data Sheet Protection Open Collector Device 2 Q 4 GND Figure 2 SchmittTrigger CF AEB01695 Block Diagram 7 V 1.1, 2008-01 TLE4921-5U General 2.2 Functional Description 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). Using an external capacitor the generated Hall voltage signal is slowly adjusted via an active high pass filter with a low cut-off frequency. This causes the output to switch into a biased mode after a time constant is elapsed. The time constant is determined by the external capacitor. Filtering avoids ageing and temperature influence from Schmitttrigger input and eliminates device and magnetic offset. The TLE4921-5U can be exploited to detect toothed wheel rotation in a rough environment. Jolts against the toothed wheel and ripple have no influence on the output signal. Furthermore, the TLE4921-5U can be operated in a two-wire as well as in a three-wireconfiguration. The output is logic compatible by high/low levels regarding on and off. 2.3 Circuit Description (see Figure 2) The TLE4921-5U is comprised of a supply voltage reference, a pair of Hall probes spaced at 2.5 mm, differential amplifier, filter for offset compensation, Schmitt trigger, and an open collector output. The TLE4921-5U was designed to have a wide range of application parameter variations. Differential fields up to ± 80 mT can be detected without influence to the switching performance. The pre-induction field can either come from a magnetic south or north pole, whereby the field strength up to 500 mT or more will not influence the switching points. The improved temperature compensation enables a superior sensitivity and accuracy over the temperature range. Finally the optimized piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets. Protection is provided at the input/supply (pin 1) for overvoltage and reverse polarity and against over-stress such as load dump, etc., in accordance with ISO-TR 7637 and DIN 40839. The output (pin 2) is protected against voltage peaks and electrical disturbances. Data Sheet 8 V 1.1, 2008-01 TLE4921-5U Maximum Ratings 3 Maximum Ratings Table 2 Absolute Maximum Ratings Tj = -40°C to 150°C Parameter Symbol Limit Values Unit Remarks min. max. VS VQ IQ -IQ -35 1) 30 V -0.7 30 V – 50 mA – 50 mA Capacitor voltage VC -0.3 3 V Junction temperature Tj – 150 °C – 160 2500 h – 170 1000 h – 210 40 h Supply voltage Output voltage Output current Output reverse current 5000 h Storage temperature TS -40 150 °C Thermal resistance PG-SSO-4-1 RthJA – 190 K/W – 200 mA t < 2 ms; v = 0.1 – 200 mA t < 2 ms; v = 0.1 Current through ISZ input-protection device Current through IQZ output-protection device 1) Reverse current < 10 mA Data Sheet 9 V 1.1, 2008-01 TLE4921-5U Operating Range 4 Operating Range Table 3 ESD Protection Human Body Model (HBM) tests according to: Standard EIA/JESD22-A114-B HBM Parameter Symbol ESD - protection VESD Table 4 min. max. – ±2 Unit Remarks kV Operating Range Parameter Supply voltage Junction temperature Limit Values Symbol VS Tj Limit Values Unit Remarks min. typ. max. 4.5 – 24 V -40 – 150 °C – – 160 2500 h – – 170 1000 h Pre-induction B0 -500 – 500 mT Differential induction ∆B -80 – 80 mT 5000 h at Hall probe; independent of magnet orientation Note: In the operating range the functions given in the circuit description are fulfilled. Data Sheet 10 V 1.1, 2008-01 TLE4921-5U Electrical and Magnetic Parameters 5 Electrical and Magnetic Parameters Table 5 Electrical Characteristics Parameter Symbol Unit Test Condition Test Circuit 1 min. typ. max. 3.8 5.3 8.0 mA 4.3 5.9 8.8 mA Output saturation voltage VQSAT – 0.25 0.6 V VQ = high IQ = 0 mA VQ = low IQ = 40 mA IQ = 40 mA Output leakage current IQL – – 50 µA VQ = 24 V 1 -1 0 1 mT -20 mT < ∆B < 20 mT 1) 2) f = 200 Hz 2 f = 200 Hz, ∆B = 20 mT f = 200 Hz, ∆B = 20 mT f = 200 Hz, ∆B = 20 mT 2 IS = 16 mA IQ = 16 mA IQ = 40 mA CL = 10 pF IQ = 40 mA CL = 10 pF f = 10 kHz ∆B = 5 mT 1 1 25°C ±2°C 1 Supply current IS Limit Values Center of ∆Bm switching points: (∆BOP + ∆BRP) / 2 Operate point ∆BOP – – 0 mT Release point ∆BRP 0 – – mT Hysteresis ∆BH 0.5 1.5 2.5 mT Overvoltage protection at supply voltage VSZ VQZ at output 27 27 – – 35 35 V V Output rise time tr – – 0.5 µs Output fall time tf – – 0.5 µs Delay time tdop tdrp tdop - tdrp RC – – – – – 0 25 10 15 µs µs µs 35 43 52 kΩ Filter input resistance Data Sheet 11 1 1 2 2 1 1 2 V 1.1, 2008-01 TLE4921-5U Electrical and Magnetic Parameters Table 5 Electrical Characteristics (cont’d) Parameter Symbol Limit Values min. typ. max. Unit Test Condition Test Circuit Filter sensitivity to ∆B SC – -5 – mV/mT – Filter bias voltage VC 1.6 2 2.4 V ∆B = 0 1 Frequency f 3) – 20000 Hz ∆B = 5 mT 2 Resistivity against mechanical stress (piezo) ∆Bm ∆BH -0.1 -0.1 – – 0.1 0.1 mT mT F=2N 2 4) 1 1) The Current consumption characteristic will be different and the specified values can slightly change 2) Leakage currents at pin 4 should be avoided. The bias shift of Bm caused by a leakage current IL can be IL × RC ( T ) calculated by: ∆ B m = ---------------------------SC ( T ) 3) For higher ∆B the values may exceed the limits like following | ∆Bm | < | 0.05 × ∆B | 1 4) Depends on filter capacitor CF. The cut-off frequency is given by f = --------------------------------. The switching points are 2π × R C × C F guaranteed over the whole frequency range, but amplitude modification and phase shift due to the 1st order highpass filter have to be taken into account. Note: The listed characteristics are ensured over the operating range of the integrated circuit. Typical characteristics specify mean values expected over the production spread. If not otherwise specified, typical characteristics apply at Tj = 25°C and the given supply voltage. Data Sheet 12 V 1.1, 2008-01 TLE4921-5U Electrical and Magnetic Parameters IS VSZ 300 Ω RP 1 VS VLD IC1) 4 C VS RL TLE4921-5U Q IQ , IQR 2 4.7 nF 1) RC = Figure 3 VQSAT, VQZ GND 3 VC ∆VC ∆ IC CL AES01696 Test Circuit 1 1 VS 4 VS CF 470 nF C TLE4921-5U GND 3 1 kΩ Q 2 VQ f min f max ∆ BOP ∆ BHy AES01258 Figure 4 Data Sheet Test Circuit 2 13 V 1.1, 2008-01 TLE4921-5U Application Configurations 6 Application Configurations Two possible applications are shown in Figure 7 and Figure 8 (Toothed and Magnet Wheel). The difference between two-wire and three-wire application is shown in Figure 9. Gear Tooth Sensing In the case of ferromagnetic toothed wheel application the IC has to be biased by the south or north pole of a permanent magnet (e.g. SmCO5 (Vacuumschmelze VX145)) with the dimensions 8 mm × 5 mm × 3 mm) which should cover both Hall probes. The maximum air gap depends on: – the magnetic field strength (magnet used; pre-induction) and – the toothed wheel that is used (dimensions, material, etc.; resulting differential field) a centered distance of Hall probes b Hall probes to IC surface L IC surface to tooth wheel N S b L a a = 2.5 mm b = 0.3 mm Figure 5 AEA01259 Sensor Spacing Conversion DIN – ASA T m = 25.4 mm/p T = 25.4 mm CP d AEA01260 ASA DIN d z m T Figure 6 Data Sheet diameter (mm) p diameter pitch p = z/d (inch) number of teeth PD pitch diameter PD = z/p (inch) module m = d/z (mm) CP circular pitch CP = 1 inch × π/p pitch T = π × m (mm) Tooth Wheel Dimensions 14 V 1.1, 2008-01 TLE4921-5U Application Configurations Gear Wheel Hall Sensor 1 Hall Sensor 2 Signal Processing S (N) Circuitry Permanent Magnet N (S) Figure 7 AEA01261 TLE4921-5U, with Ferromagnetic Toothed Wheel Magnet Wheel S S N Hall Sensor 1 Hall Sensor 2 Signal Processing Circuitry Figure 8 Data Sheet AEA01262 TLE4921-5U, with Magnet Wheel 15 V 1.1, 2008-01 TLE4921-5U Application Configurations Two-wire-application Line 1 RL VS 4 C VS Q 2 GND 3 CF 470 nF VSIGNAL RS Sensor Mainframe for example : R L = 330 Ω R S = 120 Ω AES01263 Three-wire-application Rp 4 CF 470 nF 1 VS C Q 2 GND 3 VSIGNAL 4.7 nF 4.7 nF Mainframe for example : R L = 330 Ω R P = 0 ... 330 Ω Data Sheet VS RL Sensor Figure 9 Line AES01264 Application Circuits 16 V 1.1, 2008-01 TLE4921-5U Application Configurations N (S) S (N) 1 4 B1 B2 Wheel Profile Missing Tooth Small Airgap Magnetic Field Difference ∆ B = B2 _ B1 Large Airgap ∆ BRP = 0.75 mT ∆ BHYS ∆ BOP = _ 0.75 mT Output Signal VQ Operate point: B2 _ B1 < ∆ BOP switches the output ON (VQ = LOW) Release point: B2 _ B1 > ∆ BRP switches the output OFF (VQ = HIGH) ∆ BRP = ∆ BOP + ∆ BHYS The magnetic field is defined as positive if the south pole of the magnet shows towards the rear side of the IC housing. Figure 10 Data Sheet AED01697 System Operation 17 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics 7 Typical Performance Characteristics Quiescent Current versus Supply Voltage Quiescent Current versus Temperature AED03167 10 mA IS 9 I Q = 40 mA 8 8 7 7 IS ON 6 5 IS OFF IS ON 5 IS OFF 4 3 3 2 2 0 1 IS Diff 0 5 10 15 I ON = 40 mA 6 4 1 AED03168 10 mA IS 9 IS Diff 0 -50 -10 30 20 V 25 70 110 150 ˚C 230 Tj VS Quiescent Current versus Output Current Saturation Voltage versus Temperature AED03169 10 mA IS 9 VS = 12 V VQ 400 mV AED03170 VS = 4.5 V I Q = 50 mA 8 300 7 250 IS ON 6 5 200 4 150 3 100 2 50 1 0 0 10 20 30 0 -50 40 mA 50 50 100 150 ˚C 200 Tj I OUT Data Sheet 0 18 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics Output Saturation Voltage versus IQ @ 25°C Tj Saturation Voltage versus Supply Voltage AED03171 300 mV I Q ±50 mA, VS = 4.5 V VQ AED03172 0.40 V I Q = 40 mA Tj = 25 ˚C Out Sat Voltage 200 0.30 100 0.25 0 0.20 -100 0.15 -200 0.10 -300 -400 -60 0.05 -40 -20 0 20 0 mA 60 0 5 10 15 20 Center of Switching Points versus Temperature BM Hysteresis versus Temperature AED03173 B M = ( B OP + B RP)/2 f = 200 Hz B Hy max 1 30 VS IQ 2 mT 25 4 mT AED03174 B Hy = B RP - B OP f = 200 Hz 3 max 0 2 typ typ min -1 1 min -2 -60 -20 20 60 100 0 -60 ˚C 180 20 60 100 ˚C 180 Tj Tj Data Sheet -20 19 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics Minimum Switching Field versus Frequency B min Minimum Switching Field versus Frequency AED03175 1.5 mT CF = 1 µF B min 1.0 AED03176 1.5 mT CF = 1 µF 1.0 Tj = -40 ˚C Tj = 170 ˚C Tj = 25 ˚C Tj = 150 ˚C 0.5 0.5 0 -2 10 10-1 100 0 -2 10 101 kHz 102 10-1 100 f 101 kHz 102 f Delay Time between Switching Threshold ∆B and Falling Edge of VOUT at Tj = 25°C Delay Time between Switching Threshold ∆B and Rising Edge of VOUT at Tj = 25°C 25 25 ∆B = 2mT, f =200Hz µs ∆B = 2mT, f =200Hz µs t drp t dop 20 20 15 15 10 10 ∆B = 2mT 5 5 ∆B = 2mT ∆B = 5mT ∆B = 5mT 0 0 0 5000 10000 15000 20000 Hz 25000 0 f Data Sheet 5000 10000 15000 20000 Hz 25000 f 20 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics Delay Time versus Differential Field Delay Time versus Temperature t AED03180 8.5 µs ∆ B = 2 mT, f = 200 Hz 8.0 7.5 tdrp 7.0 tdop 6.5 6.0 5.5 5.0 -60 -10 40 90 140 ˚C 190 T Rise and Fall Time versus Temperature t Rise and Fall Time versus Output Current AED03181 40 ns I Q = 40 mA t 35 AED03182 120 ns Tj = 25 ˚C 100 30 80 tr 25 60 tf tr 20 40 tf 15 20 10 -50 0 50 100 150 ˚C 200 0 Tj Data Sheet 0 20 40 60 80 mA 100 I OUT 21 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics Capacitor Voltage versus Temperature VC Switching Thresholds versus Mechanical Stress AED03183 3.0 V AED03184 1.0 ∆ Brp , (∆ Bop ) 2.5 Tj = 25 ˚C 0.9 typ 2.0 0.8 max 1.5 min 0.7 1.0 0.6 0.5 0 -50 0 50 100 0.5 150 ˚C 200 0 1 2 3 4 N 5 Tj F Filter Sensitivity versus Temperature Filter Input Resistance versus Temperature AED03185 0 mV/mT SC -1 -2 1.4 -3 1.3 -4 1.2 typ -5 1.1 -6 1.0 -7 0.9 -8 0.8 -9 0.7 -10 -50 0 50 100 0.6 -50 150 ˚C 200 Tj Data Sheet AED03186 1.6 RC R C @ 25˚C 0 50 100 150 ˚C 200 Tj 22 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics Delay Time for Power on (VS Switching from 0 V to 4.5 V) tpon versus Temp. Periodjitter (1σ) versus Temperature AED03187 0.40 ms/nF AED03188 0.50 % Jitter @ ∆ B = 10 mT k f = 1 KHz, B P = 5 mT 0.40 0.30 0.35 0.25 0.30 0.25 0.20 0.20 0.15 0.15 max typ min 0.10 0.10 0.05 0 -50 TLE4921-5U 0.05 0 50 100 0 -40 150 ˚C 200 0 40 80 120 Tj T Table 6 ˚C 200 Electro Magnetic Compatibility ref. DIN 40839 part 1; test circuit 1 Parameter Symbol Level/Typ Status Testpulse 1 Testpulse 2 Testpulse 3a Testpulse 3b Testpulse 4 Testpulse 5 VLD IV / – 100 V IV /100 V IV / – 150 V IV / 100 V IV / – 7 V IV / 86.5 V C B C C C C Note: Stresses above those listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Data Sheet 23 V 1.1, 2008-01 TLE4921-5U Typical Performance Characteristics d Branded Side Hall-Probe d : Distance chip to branded side of IC P-SSO-4-1 : 0.3 ±0.08 mm AEA02712 Figure 11 Data Sheet Distance Chip to Upper Side of IC 24 V 1.1, 2008-01 TLE4921-5U Package Outlines Package Outlines 5.34 ±0.05 2 A 0.2 12.7 ±1 7˚ 7˚ 0.6 MAX. 0.2 +0.1 0.5 3 x 1.27 = 3.81 1 -1 4x 6 ±0.5 0.4 ±0.05 18 ±0.5 1.27 CODE 38 MAX. 4 0.25 ±0.05 9 -0.5 1 (14.8) (Useable Length) CODE 1 MAX.1) (0.25) 3.38 ±0.06 3.71 ±0.08 CODE 1 x 45˚±1˚ 23.8 ±0.5 1.9 MAX. 1 -0.1 +0.75 5.16 ±0.08 0.1 MAX. 8 4 ±0.3 6.35 ±0.4 12.7 ±0.3 Total tolerance at 10 pitches ±1 A Adhesive Tape Tape 0.25 -0.15 0.39 ±0.1 1) No solder function area GPO05357 Figure 12 PG-SSO-4-1 (Plastic Single Small Outline Package) You can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.com/products. Data Sheet 25 Dimensions in mm V 1.1, 2008-01 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG