Data Sheet, V3.1, February 2005 Differential Two-Wire Hall Effect Sensor-IC for Wheel Speed Applications with Direction Detection TLE4942-1 TLE4942-1C Sensors N e v e r s t o p t h i n k i n g . Edition 2004-03-19 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 Munchen, Germany (c) Infineon Technologies AG 2005. 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. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems 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. TLE4942 Series Differential Two-Wire Hall Effect Sensor IC TLE4942-1 TLE4942-1C Features * * * * * * * * * * * * * Two-wire PWM current interface Detection of rotation direction Airgap diagnosis Assembly position diagnosis Dynamic self-calibration principle Single chip solution No external components needed High sensitivity South and north pole pre-induction possible High resistance to piezo effects Large operating air-gaps Wide operating temperature range TLE4942-1C: 1.8 nF overmolded capacitor PG-SSO-2-1 PG-SSO-2-2 Type Marking Ordering Code Package TLE4942-1 4201R4 Q62705-K738 PG-SSO-2-1 TLE4942-1C 42C1R4 Q62705-K709 PG-SSO-2-2 The Hall Effect sensor IC TLE4942-1 is designed to provide information about rotational speed, direction of rotation, assembly position and limit airgap to modern vehicle dynamics control systems and ABS. The output has been designed as a two wire current interface based on a Pulse Width Modulation principle. The sensor operates without external components and combines a fast power-up time with a low cut-off frequency. Excellent accuracy and sensitivity is specified for harsh automotive requirements as a wide temperature range, high ESD robustness and high EMC resilience. State-of-the-art BiCMOS technology is used for monolithic integration of the active sensor areas and the signal conditioning. Finally, the optimized piezo compensation and the integrated dynamic offset compensation enable easy manufacturing and elimination of magnet offsets. The TLE4942-1 is additionally provided with an overmolded 1.8 nF capacitor for improved EMI performance. Data Sheet 3 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Pin Configuration (top view) 2.67 B 2.5 A Marking 1 0.3 A 4201R4 VCC Center of sensitive area 1.44 S 0015 Data Code 0.3 B GND VCC 2 GND AEP03191 Figure 1 "VCC" Power Supply Regulator Main Comp "Signal" Oscillator (syst clock) Hall Probes: PGA Speed ADC Right Gain Range Offset DAC Center Direction ADC "X" Left Figure 2 Data Sheet Digital Circuit "X" = (Left + Right)/2 - Center AEB03192 Block Diagram 4 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Functional Description The differential Hall Effect IC detects the motion of ferromagnetic or permanent magnet structures by measuring the differential flux density of the magnetic field. To detect the motion of ferromagnetic objects the magnetic field must be provided by a backbiasing permanent magnet. Either the South or North pole of the magnet can be attached to the rear, unmarked side of the IC package. Magnetic offsets of up to 20 mT and mechanical offsets are cancelled out through a self-calibration algorithm. Only a few transitions are necessary for the self-calibration procedure. After the initial self-calibration sequence switching occurs when the input signal crosses the arithmetic mean of its max. and min. values (e.g. zero-crossing for sinusoidal signals). The ON and OFF state of the IC are indicated by High and Low current consumption. Each zero crossing of the magnetic input signal triggers an output pulse. Magnetic Signal Pulse Length Output Signal AED03189 Figure 3 Zero-Crossing Principle and Corresponding Output Pulses Data Sheet 5 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Differential Magnetic Flux Density B Range for warning pulse: BWarning Range for EL pulse: BEL BLimit (max. airgap exceeded) t AED03190 Figure 4 Data Sheet Definition of Differential Magnetic Flux Density Ranges 6 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C In addition to the speed signal, the following information is provided by varying the length of the output pulses in Figure 3 (PWM modulation): Airgap Warning range = Warning Warning information is issued in the output pulse length when the magnetic field is below a critical value (e. g. the airgap between the Hall Effect IC and the target wheel exceeds a critical value). The device works with reduced functionality. Warning information is given only in calibrated mode. Assembly position range = EL EL information is issued in the output pulse length when the magnetic field is below a predefined value (the airgap between the Hall Effect IC and the target wheel exceeds a predefined value). The device works with full functionality. Direction of rotation right = DR-R DR-R information is issued in the output pulse length when the target wheel in front of the Hall Effect IC moves from the pin GND to the pin VCC. Direction of rotation left = DR-L DR-L information is issued in the output pulse length when the target wheel in front of the Hall Effect IC moves from the pin VCC to the pin GND. At sufficient magnetic field the direction information will be corrected already during uncalibrated mode after 2 pulses. DR-L DR-R S 0015 4201R4 AEA03193 Figure 5 Data Sheet Definition of Rotation Direction 7 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Circuit Description The circuit is supplied internally by a voltage regulator. An on-chip oscillator serves as a clock generator for the DSP and the output encoder. Speed Signal Circuitry TLE4942-1 speed signal path comprises of a pair of Hall Effect probes, separated from each other by 2.5 mm, a differential amplifier including noise limiting low-pass filter, and a comparator triggering a switched current output stage. An offset cancellation feedback loop is provided through a signal-tracking A/D converter, a digital signal processor (DSP), and an offset cancellation D/A converter. During the power-up phase the output is disabled (low state). Uncalibrated Mode Occasionally a short initial offset settling time td,input might delay the detection of the input signal (the sensor is "blind"). This happens at power on or when a stop pulse is issued. The magnetic input signal is tracked by the speed ADC and monitored within the digital circuit. For detection of a magnetic edge the signal transient needs to exceed a threshold (digital noise constant, BLimit, early startup). Only the first edge is suppressed internally. With the second detected edge pulses are issued at the output. When the signal slope is identified as a rising edge (or falling edge), a comparator is triggered. The comparator is triggered again as soon as a falling edge (or rising edge respectively) is detected (and vice versa). The minimum and maximum values of the input signal are extracted and their corresponding arithmetic mean value is calculated. The offset of this mean value is determined and fed into the offset cancellation DAC. Between the startup of the magnetic input signal and the time when its second extreme is reached, the PGA (programmable gain amplifier) will switch to its appropriate position. This value is determined by the signal amplitude and initial offset value. The digital noise constant value is increased, leading to a change in phase shift between magnetic input signal and output signal. After that consecutive output pulses should have a nominal delay of about 180. Transition to Calibrated Mode In the calibrated mode the phase shift between input and output signal is no longer determined by the ratio between digital noise constant and signal amplitude. Therefore a sudden change in the phase shift may occur during the transition from uncalibrated to calibrated mode. Calibrated Mode During the uncalibrated mode the offset value is calculated by the peak detection algorithm. In running mode (calibrated mode) the offset correction algorithm of the DSP Data Sheet 8 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C is switched into a low-jitter mode, thereby avoiding oscillation of the offset DAC LSB. Switching occurs at zero-crossover of the differential magnetic signal. It is only affected by the small residual offset of the comparator and by the propagation delay time of the signal path, which is mainly determined by the noise limiting filter. Signals which are below a predefined threshold BLimit are not detected. This prevents unwanted switching. The comparator also detects whether the signal amplitude exceeds BWarning or BEL. This information is fed into the DSP and the output encoder. The pulse length of the High output current is generated according to the rotational speed, the direction of rotation and the magnetic field strength. Direction Signal Circuitry The differential signal between a third Hall probe and the mean of the differential Hall probe pair is obtained from the direction input amplifier. This signal is digitized by the direction ADC and fed into the DSP circuitry. There, the phase of the signal referring to the speed signal is analyzed and the direction information is forwarded to the output encoder. Additional Notes Typically the phase error due to PGA-transition reduces the error caused by switching the mode from uncalibrated to calibrated. In very rare cases a further PGA switching can occur during the calibration process. It can take place when the signal is extremely close to a PGA switching threshold. This additional switching might delay the transition to calibrated mode by two more pulses. The probability of this case is mainly depending on variations of magnetic amplitude under real automotive conditions (see Appendix B) The direction detection feature is also active in the uncalibrated mode but only at substantial magnetic signal. The correct direction information is worst case available after the first two output pulses in calibrated mode. Regarding the rare case mentioned before combined with other initial conditions this may lead to a worst case of 9 pulses before correct direction information is guaranteed. Package Information Pure tin covering (green lead plating) is used. Leadframe material is Wieland K62 (UNS: C18090) and contains CuSn1CrNiTi. Product is ROHS compliant and may contain a data matrix code on the rear side of the package. Data Sheet 9 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 1 Absolute Maximum Ratings Tj = - 40C to 150C, 4.5 V VCC 16.5 V Parameter Supply voltage Symbol VCC Limit Values min. max. - 0.3 - - 16.5 - 20 - 22 - 24 - 27 Unit Remarks V Tj < 80C Tj = 170C Tj = 150C t = 10 x 5 min t = 10 x 5 min, RM 75 included in VCC t = 400 ms, RM 75 included in VCC Reverse polarity current Irev - 200 mA External current limitation required, t<4h Junction temperature Tj - 150 C 5000 h, VCC < 16.5 V - 160 2500 h, VCC < 16.5 V (not additive) - 170 500 h, VCC < 16.5 V (not additive) - 190 4 h, VCC < 16.5 V 10000 - h - 40 150 C - 190 K/W Active lifetime Storage temperature Thermal resistance PG-SSO-2-1 tB,active TS RthJA 1) 1) Can be improved significantly by further processing like overmolding Note: Stresses in excess of 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 10 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 2 ESD Protection Human Body Model (HBM) tests according to: Standard EIA/JESD22-A114-B HBM (covers MIL STD 883D) Parameter Symbol ESD-Protection TLE4942-1 TLE4942-1C Table 3 Limit Values VESD min. max. - - 12 12 Unit Notes kV R = 1.5 k, C = 100 pF Operating Range Parameter Symbol Limit Values min. max. Unit Remarks Supply voltage VCC 4.5 20 V Directly on IC leads includes not the RM voltage drop Supply voltage ripple VAC - 6 Vpp VCC = 13 V 0 < f < 50 kHz Junction temperature Tj - 40 150 C - 170 500 h VCC 16.5 V, increased jitter permissible B0 - 500 Bstat.,l/r - 20 + 500 mT + 20 mT Pre-induction offset between mean of outer probes and center probe Bstat.,m/o - 20 + 20 mT Differential Induction B + 120 mT Pre-induction Pre-induction offset between outer probes - 120 Note: Within the operating range the functions given in the circuit description are fulfilled. Data Sheet 11 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 4 Electrical Characteristics All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. Typical values correspond to VCC = 12 V and TA = 25C Parameter Supply current Supply current Supply current ratio Output rise/fall slew rate TLE4942-1 Symbol ILOW IHIGH IHIGH / ILOW tr, tf Output rise/fall slew rate TLE4942-1C tr, tf Current ripple dIX/dVCC IX BLimit Limit threshold 1 Hz < f < 2500 Hz 2500 Hz < f < 5000 Hz Airgap warning threshold BWarning 1 Hz < f < 2500 Hz 2500 Hz < f < 5000 Hz Limit Values Unit min. typ. max. 5.9 7 8.4 mA 11.8 14 16.8 mA 1.9 - - 12 7.5 - - 26 24 Remarks mA/s RM 150 RM 750 See Figure 6 8 8 - - 22 26 mA/s RM = 75 T < 125C T < 170C See Figure 6 - - 90 A/V 0.35 - 0.9 - 0.8 - 1) mT 1) mT 1) 1.5 1.6 1.6 - 2.6 2.8 Limit - Airgap warning threshold ratio BWarning / 1.3 BLimit 2 2.7 Assembly position threshold BEL 7.2 9.6 5.2 mT At room temp Magnetic differential field BLimit, early - change necessary to startup detect magnetic edge in uncalibrated mode - - BLimit, early startup 0.7 1.76 3.3 mT First detected magnetic edge is suppressed (nonvalid) Initial calibration delay time td,input 255 300 345 s Magnetic edges suppressed until output switching nDZ-start - - 1 2) magn. After power on edges and stop pulse Data Sheet 12 Additional to nstart V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 4 Electrical Characteristics (cont'd) All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. Typical values correspond to VCC = 12 V and TA = 25C Parameter Symbol Limit Values min. Unit Remarks typ. max. Magnetic edges required nDZ-calibration - for offset calibration 2) - 6 2) magn. 7th edge correct 3) edges nDZ-calibration- - - 8 edges in rare cases (see Appendix B) rare Number of pulses in uncalibrated mode nDZ-Startup - - 5 pulses in rare cases (see Appendix B) nDZ-Startup- - - 7 pulses pulses After nDR-Startup pulses + 1 the direction information is correct rare Number of pulses with invalid direction information B < BEL B > BEL nDR-Startup Number of pulses with invalid assembly bit information - - - - 7 2 4) nEL-Startup - - 7 pulses After nEL-Startup pulses + 1 the assembly bit information is correct Number of pulses where nLR-Startup the airgap warning information is suppressed - - 5 pulses LR information is provided only in calibrated mode - - 2 edges Magnetic edge according to BLimit, early startup td,input has to be taken into account 293 345 397 s Signal behavior after undervoltage or standstill > tStop Number of magnetic edges where the first pulse in given. Shortest time delay between pulse 0 (stop pulse) and pulse 1 Data Sheet nDZ-Start 13 Reference rising edges, includes pre low length V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 4 Electrical Characteristics (cont'd) All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. Typical values correspond to VCC = 12 V and TA = 25C Parameter Symbol Limit Values Unit Remarks Falling to rising edge - identical with pre low bit length min. typ. max. Shortest time delay between wheel speed pulse 1 and 2 and all further pulses 38 45 52 s Phase shift change during PGA switching 0 - 80 Phase shift change during switch transition from uncalibrated to calibrated mode - 90 - + 90 1 2500 - - 2500 5000 Hz Frequency f 5) Frequency changes df/dt - - 100 Hz/ms Duty cycle duty 40 50 60 % 6) Jitter, Tj < 150C Tj < 170C 1 Hz < f < 2500 Hz SJit-close - - - - 2 3 % 7) Jitter, Tj < 150C Tj < 170C 2500 Hz < f < 5000 Hz SJit-close - - - - 3 4.5 % 7) Jitter, Tj < 150C Tj < 170C 1 Hz < f < 2500 Hz SJit-far - - - - 4 6 % 7) Jitter, Tj < 150C Tj < 170C 2500 Hz < f < 5000 Hz SJit-far - - - - 6 9 % 7) Data Sheet 14 Measured @B = 2 mT sine wave Def. Figure 7 1 value VCC = 12 V B 2 mT 1 value VCC = 12 V B 2 mT 1 value VCC = 12 V 2 mT B > BLimit 1 value VCC = 12 V 2 mT B > BLimit V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 4 Electrical Characteristics (cont'd) All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. Typical values correspond to VCC = 12 V and TA = 25C Parameter Symbol Limit Values Unit Remarks % - 40C Tamb 150C 150C Tamb 170C % - 40C Tamb 150C 150C Tamb 170C 7) min. typ. max. - - 3 - - 4 - - 5 - - 7 - - 2 % - Jitter at board net ripple in SJit-AC uncalibrated mode (1-value) - 3 % Jitter during startup and uncalibrated mode SJit-close (1-value) SJit-far (1-value) Jitter at board net ripple SJit-AC VCC = 13 V 6 Vpp 0 < f < 50 kHz B = 15 mT 7) VCC = 13 V 6 Vpp 0 < f < 50 kHz B = 15 mT 1) Magnetic amplitude values, sine magnetic field, Limits refer to the 50% critera. 50% of pulses are missing or wrong. Valid in calibrated mode only. 2) The sensor requires up to nstart magnetic switching edges for valid speed information after power-up or after a stand still condition. During that phase the output is disabled. 3) One magnetic edge is defined as a montonic signal change of more than 3.3 mT 4) Direction signal is given already during uncalibrated mode. Assembly Bit information is only provided in calibrated mode 5) High frequency behavior not subject to production test - verified by design/characterization. Frequency above 2500 Hz may have influence on jitter performance and magnetic thresholds. DR-R pulse length will be cut off above app. 3.3 kHz Therefore direction detection may not be possible anymore at high frequency. 6) During fast offset alterations, due to the calibration algorithm, exceeding the specified duty cycle is permitted for short time periods 7) Not subject to production test- verified by design/characterization Data Sheet 15 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C I tr tf IHIGH 90% 50% ILOW 10% t1 t AET03194 Figure 6 Definition of Rise and Fall Time Table 5 Timing Characteristics Parameter Symbol Limit Values Unit min. typ. max. tpre-low tWarning tDR-L tDR-R tDR-L&EL 38 45 52 s 38 45 52 s 76 90 104 s 153 180 207 s 306 360 414 s Length of DR-R & EL pulse tDR-R&EL 616 720 828 s Output of EL pulse, maximum frequency fELmax - 117 - Hz Pre-low length Length of Warning pulse Length of DR-L pulse Length of DR-R pulse Length of DR-L & EL pulse Length of stand still pulse tStop Stand still period 1) TStop Remarks 1.232 1.44 1.656 ms See Figure 9 590 848 See Figure 9 737 ms 1) If no magnetic switching edge is detected for a period longer than Tstop, the stand still pulse is issued Data Sheet 16 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C I IHIGH Xn ILOW Xn+1 Xn+2 t1 T t Duty = t1 / T x 100% AET03195 Figure 7 Definition of Duty Cycle PWM Current Interface Between each magnetic transition and the rising edge of the corresponding output pulse the output current is Low for tpre-low in order to allow reliable internal conveyance. Following the signal pulse (current is High) is output. If the magnetic differential field exceeds BEL, the output pulse lengths are 90 s or 180 s respectively, depending on the direction of rotation. When the magnitude of the magnetic differential field is below BEL, the output pulse lengths are 360 s and 720 s respectively, depending on left or right rotation. Due to decreasing cycle times at higher frequencies, these longer pulses are only output up to frequencies of approximately 117 Hz. For higher frequencies and differential magnetic fields below BEL, the output pulse lengths are 90 s or 180 s respectively. If the magnitude of the magnetic differential field is below BWarning, the output pulse length is 45 s. The warning output is dominant, this means that close to the limit airgap the direction and the assembly position information are disabled. For magnitudes of the magnetic differential field below BLimit, signal is lost. In case no magnetic differential signal is detected for a time longer than the stand still period TStop, the stop pulse is output. Typically with the first output stop pulse, the circuitry reverts to the uncalibrated mode. Data Sheet 17 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Internal Sensor Speed Signal tpre-low = 45 s tLR = 45 s Transferred Signal: LR Xn Xn+1 tDR-L = 2 x tLR Xn+2 Transferred Signal: DR-L tDR-R = 4 x tLR Transferred Signal: DR-R tDR-L&AP = 8 x tLR Transferred Signal: DR-L & EL tDR-R&AP = 16 x tLR Transferred Signal: DR-R & EL Xn Xn+1 Xn+2 AET03196 Figure 8 Data Sheet Definition of PWM Current Interface 18 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Internal Sensor Speed Signal tStop = 32 x tLR Transferred Signal: Stand Still TStop Figure 9 AET03197 Definition of Stand Still Output Pulse Duty Cycle at Fast Changing Frequencies If the duty cycle deviates from 50%, it is possible that the present pulse length is output entirely once and cut once, within the same period, see Figure 10. Internal Sensor Speed Signal at Increasing Speed Transferred Signal Pulse lengths are shorter than half sped period Pulse lengths are longer than half sped period AET03198 Figure 10 Deviation of Duty Cycle at Fast Changing Frequencies Data Sheet 19 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Table 6 Electro Magnetic Compatibility (values depend on RM!) Ref. ISO 7637-1; test circuit 1; B = 2 mT (amplitude of sinus signal); VCC = 13.5 V, fB = 100 Hz; T = 25C; RM 75 Parameter Symbol Level/Typ Status Testpulse 1 Testpulse 2 Testpulse 3a Testpulse 3b Testpulse 4 Testpulse 5 VEMC IV / - 100 V IV / 100 V IV / - 150 V IV / 100 V IV / - 7 V IV / 86.5 3) V C 1) C 1) A A B 2) C 1) According to 7637-1 the supply switched "OFF" for t = 200 ms 2) According to 7637-1 for test pulse 4 the test voltage shall be 12 V 0.2 V. Measured with RM = 75 only. Mainly the current consumption will decrease. Status C with test circuit 1. 3) Applying in the board net a suppressor diode with sufficient energy absorption capability Note: Values are valid for all TLE4941/42 types! Ref. ISO 7637-3; test circuit 1; B = 2 mT (amplitude of sinus signal); VCC = 13.5 V, fB = 100 Hz; T = 25C; RM 75 Parameter Symbol Level/Typ Status Testpulse 1 Testpulse 2 Testpulse 3a Testpulse 3b VEMC IV / - 30 V IV / 30 V IV / - 60 V IV / 40 V A A A A Note: Values are valid for all TLE4941/42 types! Ref. ISO 11452-3; test circuit 1; measured in TEM-cell B = 2 mT; VCC = 13.5 V, fB = 100 Hz; T = 25C Parameter Symbol Level/Typ Remarks EMC field strength ETEM-Cell IV / 200 V/m AM = 80%, f = 1 kHz Note: Only valid for non C- types! Ref. ISO 11452-3; test circuit 1; measured in TEM-cell B = 2 mT; VCC = 13.5 V, fB = 100 Hz; T = 25C Parameter Symbol Level/Typ Remarks EMC field strength ETEM-Cell IV / 250 V/m AM = 80%, f = 1 kHz Note: Only valid for C-types! Data Sheet 20 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C EMC-Generator Mainframe D1 VCC Sensor GND VEMC C1 D2 RM C2 AES03199 Components: D1: D2: C1: C2: RM: 1N4007 T 5Z27 1J 10 F / 35 V 1 nF / 1000 V 75 / 5 W Figure 11 Test Circuit 1 d Branded Side Hall-Probe d : Distance chip to branded side of IC PG-SSO-2-1/2 : 0.3 0.08 mm AEA02961 Figure 12 Distance Chip to Upper Side of IC Data Sheet 21 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Package Outlines PG-SSO-2-1 (Plastic Single Small Outline Package) 5.34 0.05 2 A 0.2 7 CODE 0.87 0.05 2 9 -0.5 2.54 4 0.3 6.35 0.4 12.7 0.3 Total tolerance at 10 pitches 1 1 -1 1 6 0.5 2x 0.2 +0.1 18 0.5 2x 0.5 38 MAX. 0.1 1.67 0.05 23.8 0.5 1.9 MAX. 0.25 0.05 +0.75 (14.8) (Useable Length) CODE 1 MAX.1) (0.25) 3.38 0.06 3.71 0.08 CODE 1 x 451 1.2 0.1 1.9 MAX. 1 -0.1 7 12.7 1 0.1 MAX. 5.16 0.08 A Adhesive Tape Tape 0.25 -0.15 0.39 0.1 GPO09296 1) No solder function area Figure 13 Data Sheet 22 V 3. 1, 2005-02 TLE4942-1 TLE4942-1C PG-SSO-2-2 (Plastic Single Small Outline Package) 9 -0.5 3.01 5.16 0.08 1.810.05 2.2 0.05 1 -1 2 0.25 0.05 6 0.5 1 0.2 2x 7 7 0.5 2x 1.2 0.05 1.9 MAX. 0.2 B 0.1 0.2 +0.1 1.5 0.05 38 MAX. A 0.87 0.05 1.67 0.05 2x (14.8) (Useable Length) 23.8 0.5 A CODE +0.75 2.54 CODE 0.25 0.05 18 0.5 1 x 451 1.9 MAX. 1-0.1 0.1 MAX. B 12.7 1 7.070.1 (8.17) 2 A 5.16 0.08 CODE 10.2 0.1 0.2 1.2 0.1 1) 0.65 0.1 (0.25) 3.38 0.06 3.710.08 5.34 0.05 A Adhesive Tape A-A (1.3) Tape 12.7 0.3 Total tolerance at 10 pitches 1 (2.4) (2.7) 4 0.3 6.35 0.4 0.25 -0.15 0.39 0.1 Capacitor GPO09448 5.34 0.05 1) No solder function area Figure 14 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 23 Dimensions in mm V 3. 1, 2005-02 TLE4942-1 TLE4942-1C Appendix A Typical Diagrams (measured performance) TC = Tcase, IC = approx. Tj - 5C Supply Current Ratio IHIGH / ILOW Supply Current AED03700 18 mA AED03701 2.4 IHIGH , ILOW IHIGH / ILOW 16 2.3 IHIGH 14 2.2 12 2.1 10 2.0 8 1.9 ILOW 6 -40 0 40 80 120 1.8 -40 C 200 0 40 80 120 TC C 200 TC Supply Current = f(VCC) Supply Current Ratio IHIGH/ILOW = f(VCC) AED03702 20 mA AED03703 2.4 IHIGH , ILOW IHIGH / ILOW 2.2 16 IHIGH IHIGH / ILOW 14 2.0 12 10 1.8 8 6 ILOW 0 5 10 15 20 1.6 25 V 30 5 10 15 20 25 V 30 VCC VCC Data Sheet 0 24 V3.1, 2005-03 TLE4942-1 TLE4942-1C Slew Rate without C, RM = 75 Slew Rate with C = 1.8 nF, RM = 75 AED03704 26 mA/s 24 AED03705 26 mA/s 24 Fall Slew Rate Slew Rate 22 22 20 20 18 Rise 16 18 Fall 14 16 Rise 12 14 10 12 -40 0 40 80 120 8 -40 C 200 0 40 80 120 TC TC Slew Rate without C = f(RM) Slew Rate with C = 1.8 nF = f(RM) AED03706 22 AED03707 22 mA/s mA/s 18 Fall Slew Rate 20 Slew Rate C 200 19 18 16 Fall Rise 14 12 17 10 Rise 16 8 15 6 14 4 13 2 12 0 200 400 600 0 800 1000 RM Data Sheet 0 200 400 600 800 1000 RM 25 V3.1, 2005-03 TLE4942-1 TLE4942-1C Magnetic Threshold BEL 01 Magnetic Threshold Bwarning, BLimit at f = 1 kHz B AED03708 1.6 mT B Bwarning 1.4 AED03709 5.0 mT 4.5 1.2 4.0 1.0 BEL BLimit 0.8 3.5 0.6 3.0 0.4 2.5 0.2 0 -40 0 40 80 120 2.0 -40 C 200 0 40 80 120 TC TC Magnetic Threshold Bwarning = f(f), BLimit = f(f) B Magnetic Threshold BEL 04 AED03710 1.6 mT B Bwarning 1.4 C 200 AED03711 10 mT 9 1.2 1.0 8 BLimit 0.8 BEL 7 0.6 0.4 6 0.2 0 0 10 101 102 5 -40 103 Hz 104 f Data Sheet 0 40 80 120 C 200 TC 26 V3.1, 2005-03 TLE4942-1 TLE4942-1C Jitter 1 at B = 2 mT, 1 kHz Pulse Length of Direction Signal Left and Right (tDR-L, tDR-R)2) AED03712 0.9 % 0.8 AED03713 210 s 190 DR-R Pulse Length Jitter 0.7 0.6 0.5 0.4 170 150 130 0.3 110 0.2 0.1 0 -40 0 40 80 120 70 -40 C 200 TC 0 40 80 120 C 200 TC 2) Temp. Behaviour of Other Pulse Lengths are similar Delaytime td1) td DR-L 90 AED03714 60 s 58 56 54 52 td @ 2.5 kHz 50 48 46 44 42 40 -40 0 40 80 120 C 180 TC 1) td is the time between the zero crossing of B = 2 mT sinusoidal input signal and the rising edge (50%) of the signal current. Data Sheet 27 V3.1, 2005-03 TLE4942-1 TLE4942-1C Appendix B Release 2.0 Occurrence of initial calibration delay time td, input If there is no input signal (standstill), a new initial calibration is triggered each 0.7 s. This calibration has a duration td, input of max. 300 s. No input signal change is detected during that initial calibration time. In normal operation (signal startup) the probability of td, input to come into effect is: td, input /time frame for new calibration = 300 s/700 ms = 0.05%. After IC resets (e.g. after a significant undervoltage) td, input will always come into effect. Magnetic input signal extremely close to a PGA switching threshold during signal startup After signal startup normally all PGA switching into the appropriate gain state happens within less than one signal period. This is included in the calculation for nDZ-Startup. For the very rare case that the signal amplitude is extremely close to a PGA switching threshold and the full range of the following speed ADC respectively, a slight change of the signal amplitude can cause one further PGA switching. It can be caused by non-perfect magnetic signal (amplitude modulation due to tolerances of polewheel, tooth wheel or air gap variation). This additional PGA switching can result in a further delay of the calibrated output signal up to two magnetic edges leading to a worst case edges of nDZ-Start up rare = 8. For a more detailed explanation please refer to the document "TLE4941/42 Application Notes - Frequently Asked Questions". Data Sheet 28 V3.1, 2005-03 TLE4942-1 TLE4942-1C Fast change of direction signal at small fields: The described behaviour can happen when rotation direction is changed in t < 0.7 s Direction Change of Input Signal at t = 690 AED03715 3 B 2 1 0 -1 -2 -3 0 100 200 300 400 500 600 700 800 900 1000 ms 1200 Time Figure 1 A local extremum (maximum or minimum) of the magnetic input signal can be caused during a reversal of rotation direction. In this case the local extremum can be detected by the IC and used for offset calibration. (E.g. the local maximum marked by an arrow in the above diagram.) Obviously the calculated offset value will be incorrect with respect to the following signal. As worst case a duty cycle up to max. 15% to 85% could occur for a few pulses. Bwarning and BEL information can be incorrect during that short period. After a re-calibration, which typically takes place after 2...3 zero-crossings the offset will be correct again and hence the duty cycle, Bwarning and BEL also. As a result of "bad" duty cycle after fast direction reversal the sampling points for direction detection are at unusual signal phase angles also. At small magnetic input signals (B < 1.7 x Bwarning) this can lead to incorrect direction information. Duration: max. 7 pulses, in very rare cases (additional PGA transition during calibration similar to 2.) max. 9 pulses. A local extremum close to the zero-crossing theoretically could lead to distances down to 45 s of two consecutive output pulses at the point of direction reversal as well as a Bwarning pulse also. Data Sheet 29 V3.1, 2005-03 TLE4942-1 TLE4942-1C Behaviour close to the magnetic thresholds Bwarning, BLimit, (BEL) Real non-perfect magnetic signals and intrinsic thermal noise cause amplitude variations. Very close to the magnetic thresholds a mix of output pulse widths representing the referring magnetic values occur. For similar reasons pulse widths of 90, 180, 360, 720 s can be observed occasionally for single pulses at BLimit. Behaviour close to speed v5 (fEL-bit = ca. 117 Hz) Signal imperfections like duty cycle and jitter result in a mix of output pulses with and without assembly bit (EL) information. Input signal duty cycles apart from 50% increase the range where both pulse widths appear. Dependency of direction detection on input signal pitch The direction detection is optimized for a target wheel pitch of 5 mm where it will work down to Bwarning. (Bwarning and direction detection thresholds meet at 5 mm pitch). For pitches other than 5 mm the magnetic input signal has to be increased to compensate for the inevitable signal attenuation. AED 03716 1 .8 1 .6 1 .4 Deg radation Factor 1 .2 1 .0 Speed 0 .8 0 .6 Direction 0 .4 0 .2 0 2 3 4 5 6 7 8 9 10 mm 12 Pitch Figure 2 Data Sheet Degradation of speed and direction signal at sinusoidal input signals = f(pitch) 30 V3.1, 2005-03 TLE4942-1 TLE4942-1C Revision History:2005-02, V3.1 Previous Version: 2004-06, V3.0 Page Subjects (major changes since last revision) 3,22,23 Package name changed from P-... to PG-... 22,23 Figure 13,14: Package Outline PG-SSO-2-1 - Tape thickness changed from 0.50.1mm to 0.390.1 mm - Package mold dimension changed from 5.380.05 mm to 5.340.05 mm (Note: Only the dimensions in the drawing changed, but not the package dimensions) 24-27 Appendix A inserted 28-30 Appendix B inserted - new format of data sheet 12 change Bwarning from 1.4 mT to 1.6 mT change Bwarning/Blimit from 1.75 mT to 2 mT For questions on technology, delivery and prices please contact the Infineon Technologies offices in Germany or the Infineon Technologies Companies and Representatives worldwide: see our webpage at http://www.infineon.com 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: feedback.sensors@infineon.com Data Sheet 31 V3.1, 2005-02 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG