TLE4959-5U FX FlexibleTransmission Speed Sensor Features * Hall based differential speed sensor * High magnetic sensitivity * Large operating airgap * Dynamic self-calibration principle * Adaptive hysteresis * Output protocol with and without direction of rotation detection * High vibration suppression capabilities * Three wire voltage interface * Magnetic encoder and ferromagnetic wheel application * High immunity against ESD, EMC and mechanical stress, improved voltage dropout capability * Automotive operating temperature range * End-of-line programmable to adjust transmission requirements * Green Product (RoHS compliant) * AEC Qualified Applications The TLE4959-5U FX is an integrated differential Hall speed sensor ideally suited for transmission applications. Its basic function is to provide information about rotational speed and direction of rotation to the transmission control unit. TLE4959-5U FX includes a sophisticated algorithm which actively suppresses vibration while keeping excellent airgap performance. Table 1 Description Type Marking Ordering Code Package TLE4959-5U FX 59AYA1 SP001040496 PG-SSO-4-1 Data Sheet www.infineon.com/sensors 1 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Description The TLE4959-5U FX comes in a RoHs compliant four-pin package, qualified for automotive usage. the recommended capacitors increase the EMC robustness of the device. In 12 V applications it is further recommended to use a serial resistor RSupply for protection on the supply line. A pull-up resistor RLoad is mandatory on the output pin and determines the maximum current flowing through the output transistor. A value of 1.2 k is recommended for the 5V application. (see Figure 1) Vpullup Option for 12V VS RSupply 100 ...330 V DD CV 100...470nF Data Sheet R LOAD 1.2 k Q DD Figure 1 IQ RQ 150 ... 220 GND VQ CQ 1.8 ... 4.7nF Typical Application Circuit 2 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Functional Description 1 Functional Description The differential Hall sensor IC detects the motion of tooth and magnet encoder applications. To detect the motion of ferromagnetic objects, the magnetic field must be provided by a back biasing permanent magnet. Either south or north pole of the magnet can be attached to the rear unmarked side of the IC package (See Figure 2). The magnetic measurement is based on three equally spaced Hall elements, integrated on the IC. Both magnetic and mechanical offsets are cancelled by a self calibration algorithm. 1.1 Definition of the Magnetic Field Direction The magnetic field of a permanent magnet exits from the north pole and enters the south pole. If a north pole is attached to the backside of the High End Transmission Sensor, the field at the sensor position is positive, as shown in Figure 2. Notch Tooth Notch Notch Tooth Notch IC Branded Side S Figure 2 1.2 S N N IC Branded Side Definition of the Positive Magnetic Field Direction Block Diagram VDD PMU: Chopper switches Separated supplies Bandgap (Temp. Compensated) GND Digital-Core: Figure 3 Data Sheet Diff. Hall Speed-sensing Compensated Amplifier and Tracking ADC Hall Directionsensing Compensated Amplifier and Tracking ADC Min/Max -detection Offset-calculation Hysteresis-calculation Offset compensation Direction detection Vibration suppression Output-protocol Open Drain Q EEPROM Block Diagram 3 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Functional Description 1.3 Basic Operation The speed signal calculated out of the differential hall elements, is amplified, filtered and digitized. An algorithm in the digital core for peak detection and offset calculation will be executed. The offset is fed back into the speed signal path with a digital to analog converter for offset correction. During uncalibrated mode, the output of the speed pulse is triggered in the digital core by exceeding a certain threshold of the tracking ADC. In calibrated mode the output is triggered by the visible hysteresis. The direction signal is calculated out of center Hall signals. The direction signal is amplified, filtered, and digitized. In the digital core the direction and the vibration detection information is determined and the output protocol is issued. 1.4 Uncalibrated and Calibrated Mode After power on the differential magnetic speed signal is tracked by an analog to digital converter (Tracking ADC) and monitored within the digital core. If the signal slope is identified as a rising edge or falling edge, the first output pulse is triggered. A second trigger pulse is issued with direction information. In uncalibrated mode, the output protocols are triggered by the DNC (detection noise constant) in the speed path. After start up the sensor switches with the DNC min value and after that the DNC is adapted to the magnetic input signal amplitude. The offset update starts if two valid extrema values are found and the direction of the update has the same orientation as the magnetic signal. For example, a positive offset update is being issued on a rising magnetic edge only. After a successful offset correction, the sensor is in calibrated mode. Switching occurs at the adaptive hysteresis threshold level. In calibrated mode, the DNC is adapted to magnetic input signal amplitude with a minimum of Blimit . The output pulses are then triggered with adaptive hysteresis. 1.5 Hysteresis Concept The adaptive hysteresis is linked to the input signal. Therefore, the system is able to suppress switching if vibration or noise signals are smaller than the adaptive hysteresis levels. The typical value for the hysteresis level is 1/4 of the magnetic input signal amplitude, the minimum hysteresis level is Blimit. The visible hysteresis keeps the excellent performance in large pitch transmission application wheels. Hysteresis = 0.25 * Bpp (peak to peak ) 10 8 magnetic input signal hysteresis HI hysteresis LO Bz ,diff 6 Bpp [mT] 4 2 0 -2 -4 -6 -8 -10 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 time [s] Figure 4 Data Sheet Adaptive Hysteresis 4 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Functional Description 1.6 Rotational Direction The direction signal is digitized by an analog to digital converter (direction ADC) and fed into the digital core. Depending upon the rotation direction of the target wheel, the signal of the center probe anticipates or lags behind for 90. This phase relationship is evaluated and converted into rotation direction information by sampling the signal of the center probe in the proximity of the zero crossing of the "speed" bridge signal. The first pulse after power has a different length to signalize that there is no direction information available. 1.7 Vibration Suppression The magnetic signal amplitude and the direction information are used for detection of parasitic magnetic signals. Unwanted magnetic signal can be caused by angular or air gap vibrations. If an input signal is identified as a vibration the output pulse will be suppressed. Data Sheet 5 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor General Characteristics 2 General Characteristics 2.1 Absolute Maximum Ratings Table 2 Absolute Maximum Ratings Parameter Symbol Supply voltage without supply resistor VDD Values Output ON voltage VQ_OFF VQ_ON Note or Test Condition Min. Typ. Max. -16 - 18 V continuous, TJ 175C 27 V max. 60 s, TJ 175C V max. 60 s, TJ 175C V max. 1 h,TAmb 40C -18 Output OFF voltage Unit -1.0 - -0.3 - 26.5 V continuous, TJ 175C - - 16 V continuous, TAmb 40C - - 18 V max. 1 h, TAmb 40C - - 26.5 V max. 60 s, TAmb 40C Junction temperature range TJ -40 - 185 C exposure time: max. 10 x 1 h, VDD = 16V Magnetic field induction BZ -5 - 5 T magnetic pulse during magnet magnetization; valid 10 s with Tambient 80C ESD compliance ESDHBM -2 - 2 kV HBM1) 1) ESD susceptibility, HBM according to EIA/JESD 22-A114B Note: Data Sheet 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. 6 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor General Characteristics 2.2 Operating Range All parameters specified in the following sections refer to these operating conditions unless otherwise specified. Table 3 General Operating Conditions Parameter Symbol Values Unit Note or Test Condition Min. Typ. Max. Supply voltage without supply resistance Rs VDD 4.0 - 16 V Continuous Output Off voltage VQ_OFF - - 16 V Supply voltage power- up/down voltage ramp dVDD/dt 3.0 - 1e4 V/ms Supply current IDD 8.0 - 13.4 mA Continuous output On current IQ_ON - 15 mA Magnetic signal frequency range f 0 - 10 kHz Frequency range for direction detection (hystersis)once high speed has been selected fDir 0 4.3 kHz increasing rotational frequency 0 4 kHz decreasing rotational frequency Maximum number of EEPROM programming cycles NPROG 100 n - 120 mT Dynamic range of the magnetic field DRmag_field_dir -60 of the direction channel - 60 mT Static range of the magnetic field of SRmag_field_s the outer Hall probes - 550 mT - 450 mT Dynamic range of the magnetic field DRmag_field_s of the differential speed channel -120 0 Static range of the magnetic field of DRmag_field_dir -100 the center Hall probe VQ_LOW < 0.5 V Allowed static difference between outer probes SRmag_field_diff -30 - 30 mT Normal operating junction temperature TJ -40 - 175 C exposure time: max. 2500 h at TJ = 175C, VDD = 16 V - - 185 C exposure time: max. 10 x 1 h at TJ = 185C, VDD = 16 V, additive to other lifetime 150 C without sensor function; exposure time max 500 h @ 150C; increased time for lower temperatures according to ArrheniusModel, additive to other lifetime Not operational lifetime Data Sheet Tno -40 7 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor General Characteristics Table 3 General Operating Conditions (cont'd) Parameter Symbol Ambient temperature range for device features reading and programming TRDPROG Temperature compensation range of magnetic material TC Note: Data Sheet Values Unit Note or Test Condition Min. Typ. Max. 15 25 130 -600 C during programming at customer ppm internal compensation of magnetic signal amplitude of speed signal In the operating range the functions given in the functional description are fulfilled 8 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Electrical and Magnetic Characteristics 3 Electrical and Magnetic Characteristics All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. Typical values correspond to VS = 5 V and TAmb. = 25C Table 4 Electrical and Magnetic Parameters Parameter Symbol Values Unit Note or Test Condition Min. Typ. Max. - 500 mV IQ 15 mA Output saturation voltage VQsat 0 Clamping voltage VDD-Pin VDD_clamp 42 - V leakage current through ESD diode < 0.5mA Clamping voltage VQ-Pin VQclamp 42 - V leakage current through ESD diode < 0.5mA Reset voltage VDD_reset 2.8 3.6 V Output leakage current IQleak 0 0.1 10 A Output current limit during short-circuit condition IQshort 30 - 80 mA Junction temperature limit for output protection Tprot 190 - 205 C Power on time tpower_on 0.8 0.9 1 ms Delay time between magnetic signal switching point and corresponding output signal falling edge switching event tdelay 10 14 19 s Output fall time tfall 2.0 2.5 3.0 s VPullup = 5 V, RPullup = 1.2 k (+/10%), CQ = 1.8 nF (+/-15%), valid between 80% - 20% 3.2 4.5 5.8 s VPullup = 5 V, RPullup = 1.2 k (+/10%), CQ = 1.8 nF (+/-15%), valid between 90% - 10% 4 - 11.4 s RPullup = 1.2 k (+/-10%), CQ = 1.8 nF (+/-15%), valid between 10% - 90% 1.22 1.5 1.78 mT trise1) Output rise time Digital noise constant of speed DNCmin channel during start up Adaptive hysteresis threshold HYSadaptive Period Jitter, f 8 kHz2) Period Jitter, 8kHz f 10kHz Number of wrong pulses at start-up Data Sheet 2) VQ = 18 V during this time the output is locked to high. 25 % EEPROM "HYST_ADAPT"Option 0 12.5 % EEPROM "HYST_ADAPT"Option 1 Jit8kHz -1 - 1 % 1 sigma, Bpkpk = 3mT Jit10kHz -1.1 - 1.1 % 1 sigma, Bpkpk = 3mT nStart - - 0 n in forward rotational direction 0 - 1 n in backward rotational direction 9 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Electrical and Magnetic Characteristics Table 4 Electrical and Magnetic Parameters (cont'd) Parameter Symbol Values Min. Unit Note or Test Condition Typ. Max. - 40 % of magnetic speed signal amplitude 0 - 60 % of magnetic speed signal amplitude with reduced performance on stand-still functionality Runoutglob 0 - 40 % of magnetic direction signal amplitude 0 - 60 % of magnetic direction signal amplitude with reduced performance on stand-still functionality Tooth to tooth run out (peak to Runouttooth 0 peak variation on two ,speed consecutive teeth / pole-pair)3) Runout tooth 0 - 40 % of magnetic speed signal amplitude - 40 % of magnetic direction signal amplitude 3) Global run out Runoutglob 0 al,speed al,dir ,dir 1) Application parameter, IC shall not increase the rise time, Values are calculated and not tested 2) Parameter not subject to productive test. Verified by lab characterization based on jitter-measurement > 1000 periods 3) Defined as 1-(amplitude_min/amplitude_max) Note: The listed Electrical and magnetic characteristics are ensured over the operating range of the integrated circuit. Typical characteristics specify mean values expected over the production spread. If not other specified, typical characteristics apply at TAmb = 25C and VS = 5 V. 3.1 Output protocols TLE4959-5U FX provides the option to select output protocol without direction detection. As well as the following direction detection options where the direction is provided via PWM protocol. Table 5 Option 1 Parameter Symbol Values Unit Min. Typ. Max. Output pulse in forward direction tfwd 38 45 52 s Output pulse in backward direction tbwd 114 135 155 s Power on pulse tpower-on 153 180 207 s Data Sheet 10 Note or Test Condition 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Electrical and Magnetic Characteristics Table 5 Option 1 (cont'd) Parameter Symbol Values Min. Typ. Max. Unit Note or Test Condition Output pulse at High speed thigh_speed 25.5 30 34.5 s pulse available after High speed option has been selected Stand still pulse tstand-still 51 60 69 s pulse available stand still after pulse option has been selected. Pulse delivered if no relevant magnetic signal change has been detected within 50ms Note: Table 6 VPullup = 5 V, RPullup = 1.2 k (+/-10%), CQ = 1.8 nF (+/-15%), valid between 50% of falling edge to 50% of next rising edge Option 2 Parameter Symbol Values Unit Min. Typ. Max. Output pulse in forward direction tfwd 38 45 52 s Output pulse in backward direction tbwd 153 180 207 s Output pulse at High speed tstand-still 38 45 52 s Note or Test Condition pulse available after High speed option has been selected Attention: First pulse after magnetic edge suppressed Note: Table 7 VPullup = 5 V, RPullup = 1.2 k (+/-10%), CQ = 1.8 nF (+/-15%), valid between 50% of falling edge to 50% of next rising edge Option 3 Parameter Symbol Values Unit Min. Typ. Max. Output pulse in forward direction tfwd 51 60 69 s Output pulse in backward direction tbwd 102 120 138 s Power on pulse tpower-on 25.5 30 34.5 s Output pulse at High speed thigh_speed 25.5 30 34.5 s Data Sheet 11 Note or Test Condition pulse available after High speed option has been selected 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Electrical and Magnetic Characteristics Note: Table 8 VPullup = 5 V, RPullup = 1.2 k (+/-10%), CQ = 1.8 nF (+/-15%), valid between 50% of falling edge to 50% of next rising edge Option 4 Parameter Symbol Values Unit Min. Typ. Max. Output pulse in forward direction tfwd 38 45 52 Output pulse in backward direction tbwd 76.5 90 103.5 s Power on pulse tpower-on 153 180 207 s Output pulse at High speed thigh_speed 38 45 52 s Note: Data Sheet Note or Test Condition s pulse available after High speed option has been selected VPullup = 5 V, RPullup = 1.2 k (+/-10%), CQ = 1.8 nF (+/-15%), valid between 50% of falling edge to 50% of next rising edge 12 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor EEPROM Functional Description 4 EEPROM Functional Description 4.1 Serial Interface The serial interface is used to set parameter and to program the sensor IC, it allows writing and reading of internal registers. Data transmission to the IC is done by supply voltage modulation, by providing the clock timing and data information via only one line. Data from the IC are delivered via the output line, triggered by as well clocking the supply line. In normal application operation the interface is not active, for entering that mode a certain command right after power-on is required. A detailed document (TLE4959C FX EEPROM Programming Guide) is available on request. It contains the description of electrical timing and voltage requirements, as well as the information about data protocol, available registers and addresses. 4.1.1 Data Transmission Commands to the sensor are sent by modulating the supply voltage between two levels VDD,high and VDD,low. They are sent in series of 17 pulses corresponding to 16 bit words, with MSB transmitted first and LSB last, respectively the stop bit. Each of the 16 pulses is coded by the duty cycle as logical "0" or "1". Logical "1" is represented by a duty cycle of 2/3 of the period on VDD,high, logical "0" is represented by a duty cycle of 1/3 at VDD,high. This forms the bit information and acts also as serial interface clock. Data transmission from the device is represented by the state of the output, high for logical "1" and low for logical "0". Recommended period length is around 200 (tbd) s per bit. End of word is indicated by a long "low" supply (> 750 ms, first 30 ms should be > VDD,high, remaining time < VDD,low). Please note, that for transmission of 16 data bits in total 17 pulses on VDD are necessary. If more than 16 input bits are transmitted the output bits are irrelevant (transmission buffer empty), whereas the input bits remain valid and start overwriting the previously transmitted bits. In any case the last 17 transmitted bits are interpreted as transmitted data word (16 bit) + 1 stop bit. tON VDD t dig_reset tSupply ,enter 0 0 0 0 1 0 0 MSB tbit t bit tbit tbit tbit t bit thigh t low 1 1 0 1 1 1 0 LSB Stop_bit=0 tSupplyhigh,exit t stop VDD,high VDD,low pulse1...... pulse17 0 time VQ Figure 5 Data Sheet MSB LSB Serial Protocol 13 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor EEPROM Functional Description 4.2 EEPROM Description Several options of TLE4959C FX can be programmed via an EEPROM to optimize the sensor algorithm to the individual target wheel and application requirements. The EEPROM memory is organized in 2 customer lines. Each line is composed of 16 data bits and additional 6 bits for error detection and correction, based on ECC (Error Correction Code). For more detailed information about EEPROM access and programming an additional document is available on request. Table 9 15 EEPROM Address 0x0 14 Table 10 13 12 11 10 9 8 7 6 5 4 3 2 1 Functional Description Address 0x0 Field Bit Type Description Default value Not used 15 r Always read as "0" 0 Not used 14 rw To be set to "0" 0 HIGH_SPEED 13 rw 0 = Enabled motion detection 0 1 = According selected protocol when above 4.3kHz Not used 12 rw To be set to "0" STAND_EN 11 rw 0=disable stand-still pulse 0 1=enable stand-still pulse Stand still pulse is provided, if enabled, only if PW_CHIOICE=00 Not used 10..0 rw Table 11 EEPROM Address 0x1 15 14 Table 12 13 12 11 10 0 To be set to "00000000000" 9 8 7 6 00000000000 5 4 3 2 1 0 Functional Description Address 0x1 Field Bit Not used 15:14 rw To be set to "01" 01 PW_CHOICE 13:12 rw Choice of PWM protocol for direction detection. 00 = Option 1 01 = Option 2 10 = Option 3 11 = Option 4 11 FORWARD_DEF 11 rw 0 = None invertion of forward definition 1 = Invertion of forward definition 0 EDGE_POLAR 10 rw 0 = None invertion 1 = Invertion 0 HYST_ADAPT 9 rw 0 = 25% 1 = 12.5% 1 Data Sheet 0 Type Description Default value 14 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor EEPROM Functional Description Table 12 Functional Description Address 0x1 (cont'd) Field Bit Type Description Default value Not used 8.. 5 rw To be set to "1101" 1101 DNC_ADAPT 4 rw DNC Adaption: 0 = 25% 1 = 12.5% 0 Not used 3 rw To be set to "0" 0 DIR_ENABLE 2 rw 0 = Direction detection off 1 = Direction detection on 1 Not used 1 rw To be set to "1" 1 LOCK 0 rw 0 = User area of EEPROM is unlocked 1 = User area of EEPROM is locked (no reprogramming possible) 0 Data Sheet 15 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Package Information 5 Package Information Pure tin covering (green lead plating) is used. The product is RoHS (Restriction of Hazardous Substances) compliant and marked with letter G in front of the data code marking and may contain a data matrix code on the rear side of the package (see also information note 136/03). Please refer to your key account team or regional sales if you need further information. The specification for soldering and welding is defined in the latest revision of application note "Recommendation for Board Assembly-Hallsensor SSO Packages". 5.1 Package Outline Figure 6 PG-SSO-4-1 (Plastic Green Single Slim Outline), Package Dimensions Figure 7 Position of the Hall Elements and distance to the branded Side Data Sheet 16 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Package Information 5.2 Marking and Data Matrix Code Figure 8 Marking of PG-SSO-4-1 Package Table 13 Pin Description 1) Pin Number Symbol Function 1 VDD Supply Voltage 2 GND Ground 3 GND Ground 4 Q Open Drain Output 1) Refer to frontside view: leftmost pin corresponding to pin number 1 Data Sheet 17 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Package Information 5.3 Figure 9 Data Sheet Packing Information PG-SSO-4-1 Ammopack 18 1.0 2018-07 TLE4959-5U FX FlexibleTransmission Speed Sensor Revision History 6 Revision History Revision Date Changes 1.0 First released version of Datasheet Data Sheet 2018-07 19 1.0 2018-07 Please read the Important Notice and Warnings at the end of this document Trademarks of Infineon Technologies AG HVICTM, IPMTM, PFCTM, AU-ConvertIRTM, AURIXTM, C166TM, CanPAKTM, CIPOSTM, CIPURSETM, CoolDPTM, CoolGaNTM, COOLiRTM, CoolMOSTM, CoolSETTM, CoolSiCTM, DAVETM, DI-POLTM, DirectFETTM, DrBladeTM, EasyPIMTM, EconoBRIDGETM, EconoDUALTM, EconoPACKTM, EconoPIMTM, EiceDRIVERTM, eupecTM, FCOSTM, GaNpowIRTM, HEXFETTM, HITFETTM, HybridPACKTM, iMOTIONTM, IRAMTM, ISOFACETM, IsoPACKTM, LEDrivIRTM, LITIXTM, MIPAQTM, ModSTACKTM, my-dTM, NovalithICTM, OPTIGATM, OptiMOSTM, ORIGATM, PowIRaudioTM, PowIRStageTM, PrimePACKTM, PrimeSTACKTM, PROFETTM, PRO-SILTM, RASICTM, REAL3TM, SmartLEWISTM, SOLID FLASHTM, SPOCTM, StrongIRFETTM, SupIRBuckTM, TEMPFETTM, TRENCHSTOPTM, TriCoreTM, UHVICTM, XHPTM, XMCTM. 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