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data sheet version 1.00 www.infineon.com/sensors 2016-06-01 confidential TLE4955C-E2 differential hall effect transmission speed sensors features ? high magnetic sensitivity ? large operating airgap ? two wire pwm current interface ?fast start-up ? dynamic self calibration principle ? adaptive hysteresis ? detection of rotation direction ? high vibration suppression capability ? from zero speed up to 12 khz 1) ? wide operating temperature ranges ? high resistance to piezo effects ? single chip solution ? magnetic encoder and ferrom agnetic wheel application ? south and north pole pre-induction possible ? green package with lead-free plating ? module style package with inte grated overmolded capacitor 2) ?1.8nf between v dd and gnd ? aec-q100 qualified ? green product (rohs compliant) applications the TLE4955C-E2 is an integrated differ ential hall effect sensor for tran smission applications with two wire pwm output current interface. its basic function is to provide information about rotational speed and direction of rotation to the transm ission control unit. tle 4955c-e2 includes a sophis ticated algorithm which actively suppresses vibration while k eeping excellent air gap performance. description 1) magnetic parameters are valid and characterized for f > 1 hz 2) value of capacitor: 1.8 nf +/-1 0% (excluded drift becaus e of temperature and over lifetime); ceramic: x8r; ma ximum voltage: 50 v. product name ordering code marking package TLE4955C-E2 sp001387544 55bic2 pg-sso-2-53
data sheet 2 version 1.00 2016-06-01 TLE4955C-E2 confidential family description product name ordering code marking package tle4955-e4 sp001386734 55bia1 pg-sso-2-1 tle4955c-e4 sp001387576 55bic3 pg-sso-2-53 TLE4955C-E2 sp001387544 55bic2 pg-sso-2-53 tle4955c sp001368954 55bic0 pg-sso-2-53 tle4955 sp001368950 55bia0 pg-sso-2-1 tle4955cb sp001368958 55bkc0 pg-ssom-2-11 tle4955cb-e2 sp001387548 55bkc1 pg-ssom-2-11 tle4955cb-e4 sp001467318 55bkc2 pg-ssom-2-11
data sheet 3 version 1.00 2016-06-01 TLE4955C-E2 confidential features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 sensor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 operating modes and states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 uncalibrated and calibrated mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 adaptive hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3 direction detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 vibration suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 undervoltage behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 esd robustness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 9 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table of contents
data sheet 4 version 1.00 2016-06-01 TLE4955C-E2 confidential 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 mu st be provided by a back biasing permanent magnet. either south or north pole of the magnet can be atta ched to the rear unmarked side of the ic package. the magnetic measurement is base d on three equally spaced hall elements, integrated on the ic. both magnetic and mechanical offsets are ca ncelled by a self calibration algorithm. the sensor includes a curr ent output pwm protocol. 1.1 sensor assembly the output signals for a south biased sensor with a magnetic encoder and ferrom agnetic tooth wheel will be issued in the following way. the tooth wheel is rotating in cloc kwise above the sensor. the output pu lse will be issued by reaching the hysteresis levels after the pre low time. for a tooth wh eel with ideal pitch (tooth to tooth) of 5 mm the direction signal achieves a phase shift of 90 compared to the speed signal. sensor and back bias magnet can be applied in th e following ways: figure 1 sensor assembly and de finition of rota ting directions cw s 0015 4952 n s s s s s n n n n s 0015 4952 gyyww 123456 vdd gnd ccw cw ccw cw ccw s 0015 4952 s 0015 4952 gyyww 123456 gnd vdd n s n s s 0015 4952 s 0015 4952 gnd vdd n s n s gyyww 123456
data sheet 5 version 1.00 2016-06-01 TLE4955C-E2 confidential functional description figure 2 tooth wheel vs. sensor output sign al in clockwise rotation; south biased sensor tooth tooth ? b dir ? b speed hysteresis high level hysteresis low level pre-low pre-low pre-low notch notch t t t i low i high i dd notch
data sheet 6 version 1.00 2016-06-01 TLE4955C-E2 confidential functional description 1.2 block diagram figure 3 block diagram the speed signal calculated out of b 2 -b 1 , is amplified, low pass filtered and digitized. an algorithm in the digital core for peak detection and offset calculation will be exec uted. the offset is fed back into the speed signal path with a digital to analog converter for offset correction. the adaptive hysteresis comparat or compares the speed signal to the hysteresis value. during uncalibrated mode, the output of the speed pulse is triggered in the digital core by exceeding a certain threshold. the direction signal is calculated out of the three hall signals. the direction signal is amplified, filtered, and digitized. in the digital core the direction and the vi bration detection information is determined and the data protocol is issued. the direction information is converted to a current modulated signal. supply comparator lpf dir calc offset dac lpf ? b dir g s1 g d b 2 b 3 b 1 2 (r ight) 1 (left ) 3 (center ) speed signal: ? b spe ed =b 2 -b 1 direction signal: ? b dir =b 3 -(b 2 +b 1 )/2 pr e-amplifier with db dir calculation amplifier speed path esd v dd supply voltage generation bandgap oscillator offset calculation multiplexed adc output protocol tracking adc algorithm direction detection adaptive hysteresis comparator vibration detection ? b speed curr ent modulator gnd
data sheet 7 version 1.00 2016-06-01 TLE4955C-E2 confidential operating modes and states 2 operating modes and states 2.1 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, the first output pulse is triggered. a second trigger pulse is issued as soon as the next rising edge is detected (see figure 4 ). in uncalibrated mode, the output protocols are triggere d by the dnc (detection noise constant) in the speed path. after start up the first dnc value is set to 2x b speed- limit and after that the dnc is adapted to the magnetic input signal amplitude ( b speed ) with a minimum of 2x b speed-limit . the offset update starts if two va lid extrema values are found and the direction of the update has the same orientation as the magnetic signal. for example, a positi ve offset update is being issued on a rising magnetic edge only. the offset update is done independent fr om the output switching. after a successful offset correction, the sensor is in calibrated mode. switchin g occurs at the adaptive hysteresis threshold level. in calibrated mode, the dnc is adapted to magnetic input signal amplitude (as b speed /2) with a minimum of 2x b speed-limit . the output pulses are then trig gered with adaptative hysteresis. in uncalibrated mode (after start-up or rese t) for signals with amplitude smaller than 2* b limit (either for direction or speed signal), the sens or always provides the first two pulses and coul d suppress the third one. the pulse corresponding to the forth magnetic period is calibrated, thus including the direction information.
data sheet 8 version 1.00 2016-06-01 TLE4955C-E2 confidential operating modes and states figure 4 example for startup behavior and tran sition from uncalibrated into calibrated mode 2.2 adaptive hysteresis 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 1/8 of the magnetic input signal amplitude, the minimum hysteresis level is b speed-limit (amplitude). the visible hysteresis keeps the excellent performanc e in large pitch transmission application wheels . figure 5 adaptive hysteresis di recti on ? b speed dnc=(min1+ max1)/2 max1 min1 min2 dnc=( min2+max1)/2 phase shift change uncalibrated mode vs . calibrated mode speed di recti on uncalibrated speed signal with negative offset uncalibrated speed signal with positive offset calibrated speed signal hysteresis high level hysteresis low level power on vibration suppression via hysteresis vibration suppression via direction detection dnc: 2xdb speed-limit t t i low i high i dd direction input signal adaptive hysteresis ? b speed hysteresis high level hysteresis low level input signal adaptive hysteresis t
data sheet 9 version 1.00 2016-06-01 TLE4955C-E2 confidential operating modes and states 2.3 direction detection the difference between the hall element signal b 3 and the mean value of the outer hall elements b 2 and b 1 will be calculated in the direction input amplifier. this 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 relationsh ip is evaluated and converted into rotation direction information by sampling the signal of the center pr obe in the proximity of the zero cro ssing of the ?speed? bridge signal. the first pulse after power on is a speed pulse, as there is no valid direction information available. 2.4 vibration suppression the magnetic signal amplitude and the direction info rmation 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. TLE4955C-E2 offers two different kinds of vibration suppression: ? vibration suppression via hysteresis . this is availa ble after power on ? vibration suppression via direction detection. this is available after start up calibration is performed. 2.5 undervoltage behavior at the first switching events after power on the undervoltage detection is activated. if the supply voltage drops below the va lues specified in operating range, an active output (defined state) will be generated. the output level is switched to high current (i high ) and it remains at this level until the supply voltage reaches again the functional level. figure 6 undervoltage behavior if the supply voltage is below 2.3 v typical the sensor will reset and initiate a new calibration. v dd on ic leads vdd on ic leads current 1st switching enables vdd reset vdd voltage drops due to increased current throught r m switches to i high due to undervoltage the sensor starts with power on process startup mode operating mode undervoltage operating mode release pre -low bit i high i low v reset i dd
data sheet 10 version 1.00 2016-06-01 TLE4955C-E2 confidential absolute maximum ratings 3 absolute maximum ratings attention: stresses above the max. values listed here may cause permanent damage to the device. exposure to absolute maximum rating conditio ns for extended period s may affect device reliability. maximum ratings are absolutes rati ngs; exceeding only one of these values may cause irreversible damage to the integrated circuit 4 esd robustness characterized according to human body model (hbm) te st in compliance with standard eia/jesd22-a114-b hbm (covers mil std 883d) table 1 absolute maximum ratings parameter symbol values unit note or test condition min. typ. max. supply voltage v dd -0.3 v t j <80c 16.5 v t j = 170 c 20 v t j = 150 c 22 v t = 10x5 min. 24 v t = 10x5 min.; r m > 75 27 v t = 400ms, r m > 75 , -22 v r m = 75 , t <1h junction temperature t j ; either -40 110 c 12500 h or 125 c 10000 h or 150 c 5000 h or 160 c 2500 h or 170 c 500 h additional 190 c 4 h, v dd < 16.5 v reverse polarity current i dd -200 ma external current limitation required, t <4h -300 ma external current limitation required, t <1h -200 ma external current limitation required, t <10h, t j =25c thermal resistance (pg-sso-2-53) r thja 190 k/w lower values are possible with overmolded devices number of power on cycles n 500000 cycles table 2 esd protection parameter symbol test result unit note esd-protection v esd 12 kv r = 1.5 k , c = 100 pf
data sheet 11 version 1.00 2016-06-01 TLE4955C-E2 confidential operating range 5 operating range all parameters specified in the fo llowing sections refer to these op erating conditions unless otherwise noticed. for further details please refer to relevant application note. table 3 operating range parameter symbol values unit note or test condition min. typ. max. supply voltage v ddic 4 20 v directly on the ic leads supply voltage modulation v ac 6v v dd = 13 v; 0< f mod < 150 khz 1) peak-to-peak 1) sine wave. operating junction temperature t j either -40 110 c 12500 h or 125 c 10000 h or 150 c 5000 h or 160 c 2500 h or 170 c 500 h junction temperature variation between two consecutive magnetic edges t j_var -60 60 k values apply for b speed and b dir > 2.5mt (amplitude) in calibrated mode. in case of uncalibrated sensor, values apply for b speed and b dir > 7.5mt (amplitude) 3) . frequency range of magnetic input signal 2) 2) no time based watchdog. f0 12khz bias-induction 3) 3) not subject to production test, verified by design/characterization. b o -500 +500 mt magnetic bias induction at the position of each sensing element (b 1 , b 2 , b 3 ) differential bias- induction 3) b stat l/r -30 +30 mt difference of the magnetic bias induction between left (b 1 ) and right (b 2 ) sensing element differential bias-induction between mean value at left, right and center sensing elements 3) b stat m/o -30 +30 mt difference of the magnetic bias induction between (b 2 +b 1 )/2 and b 3 speed signal range b speed,range -120 120 mt minimum speed signal b speed- limit 0.6 1.1 2.0 mt amplitude value 99% criteria 4) 4) 99% criterion stands for 1 out of 100 pulses is missing. minimum direction signal b dir-limit 0.9 2.2 mt amplitude value 99% criteria 4)
data sheet 12 version 1.00 2016-06-01 TLE4955C-E2 confidential operating range note: magnetic parameters are valid for sinusoidal signals and characterized for f > 1 hz.
data sheet 13 version 1.00 2016-06-01 TLE4955C-E2 confidential electrical characteristics 6 electrical characteristics all values specified at constant amplitude and offset of input signal, over operating range, unless otherwise specified. typical values correspond to v dd = 12 v and t j = 25 c. table 4 electrical characteristics parameter symbol values unit note or test condition min. typ. max. supply current low i low 678 ma supply current high i high 12 14 16 ma supply current ratio i high / i low 1.9 2.2 output rise/fall slew rate sr r , sr f 81726ma/ svalid for t r and t f , between 10% and 90% value r m =75 , t j <175 c reset voltage v dd reset 3.7 4 v power on time 1) t on 1ms v dd > 4 v magnetic edges required for first output pulse 1) n start 2 magn. edge no vibration, pulse occurs only on rising magnetic edge number of output pulse until active vibration suppression via hysteresis 1) n vh-startup 0 pulse active after power on number of output pulse until active vibration suppression via direction detection 1) n vd-startup 2 pulse vibration suppression activated with complete 3 rd magnetic signal period number of magnetic periods generating missing output pulses or pulse without direction information 1) n dr-start 1pulse b dir > 2* b dir-limit and b speed > 2* b speed-limit 1pulse b dir > 1.25* b dir-limit and b speed > 1.25* b speed-limit and f 2.5 khz 2) 3pulse b dir-limit < b dir < 2* b dir-limit or b speed-limit < b speed < 2* b speed-limit 3) invalid direction after change of direction 1) n iac 1pulse 2 nd pulse correct if b dir > b dir-limit period jitter 1) , f 2500 hz s jit-far , t j 150 c 1.6 % 1 value 4) , v dd =12 v, b speed > 2 mt (amplitude) s jit-far , t j 170 c 2.4 %
data sheet 14 version 1.00 2016-06-01 TLE4955C-E2 confidential timing characteristics 7 timing characteristics between each magnetic transition an d the rising edge of the correspond ing output pulse, the output current is low for t pre-low in order to allow reliable internal conveyance. after pre low time the output current level is set to high. after power on the speed pulse is bein g issued. as soon as the sensor has enough information to recognize the direction of the target wheel, the output pul se will include the direction information. period jitter 1) , 2500hz< f < 12 khz s jit-far , t j 150 c 2.7 % 1 value 5) , v dd =12 v, b speed > 2mt (amplitude) s jit-far , t j 170 c 4.0 % period jitter at board net ripple 1) s jit-ac 2.0 % v cc = 13v + 3 v pp ; 1 ; 0< f mod <150 khz; b speed =7.5 mt 1) not subject to production test, verified by design/characterization. 2) all conditions must be applied simultaneously. 3) either condition or both simu ltaneously need to be applied. 4) values based on 3 measurements. table 4 electrical characteristics (cont?d) parameter symbol values unit note or test condition min. typ. max.
data sheet 15 version 1.00 2016-06-01 TLE4955C-E2 confidential timing characteristics figure 7 definition of pwm current interface table 5 timing characteristics parameter symbol values uni t note or test condition min. typ. max. pre-low length t pre-low 26.25 30 33.75 s lenght of first pulse t s 157.5 180 202.5 s first pulse after power on length of ccw pulse t ccw 78.75 90 101.25 s length of cw pulse t cw 39.37 45 50.62 s cw / ccw pulse maximum frequency f cw 12000 hz f ccw 8000 hz uncalibrated speed signal with negative offset calibrated speed signal hysteresis high level hysteresis low level t pre-low t ccw or t cw t pre-low t s power on ? b speed t t i low i high t pre-low i dd t ccw or t cw
data sheet 16 version 1.00 2016-06-01 TLE4955C-E2 confidential timing characteristics figure 8 definition of ri se and fall time; duty cycle= (t s / t) x 100% 10% 90% 50 % t r t f i i high i low t s t t
data sheet 17 version 1.00 2016-06-01 TLE4955C-E2 confidential electromagnetic compatibility 8 electromagnetic compatibility electromagnetic compatibility (values depends on r m !). see figure 9 note: characterization of electro magnetic compat ibility is carried out on samples based on one qualification lot. not al l specification parameters have been monitored during emc exposure. only key parameters e.g. switching current have been monitored. table 6 conducted pulses ref. iso 7637-2; 2004; b speed = 2 mt (amplitude of sinus signal); v dd = 13.5v; f b = 100 hz; t j = 25 c; r m =75 parameter symbol level/type status testpulse 1 v emc iv / -100 v c testpulse 2a 1) 1) iso 7637-2 describes in ternal resistance = 2 (former 10 ) iv / 75 v a 2) 2) node a does not exceed 27 v clamping vo ltage of d2 in any case; design target! testpulse 2b - / 10 v c 3) 3) ri=0.01 testpulse 3a iv / -150 v a testpulse 3b iv / 100 v a testpulse 4 4) 4) testpulse4 tested for v dd =12 v iv / -7 v c testpulse 5a iv / 86.5 v c testpulse 5b us*=28.5 v 5) 5) a central load dump protection of 42 v is used. us*=42 v-13.5 v c table 7 coupled pulses ref. iso 7637-3; 1995; b speed =2 mt (amplitude of sinus signal); v dd=13.5 v; f b=100 hz; tj=25 c; r m =75 parameter symbol level/typ status testpulse 3a iv / -60 v a testpulse 3b iv / 40 v a table 8 tem-cell measurement ref. iso 11452-3, 2nd edition 2001- 03-01; measured in tem-cell; b speed = 2 mt (amplitude of sinus signal) v dd = 13.5 v; f b =100 hz; t =25c; r m =75 parameter symbol level/typ status e temcell iv / 250 v/m cw; am=80%, f=1 khz
data sheet 18 version 1.00 2016-06-01 TLE4955C-E2 confidential electromagnetic compatibility figure 9 emc test circuit figure 10 application circuit components d1= 1n4007 d2= 27 v c1= 1.8nf / 50 v c2= 10 f / 35 v c3= 1 nf / 1000 v r m = 75 gnd d1 d2 c2 c1 mainframe v ddic v emc r m c3 emc generator aes03199 ic + c package gnd d1 d2 c2 c1 ic + c package gnd tcu v ddic i dd v dd r m c3 sensor module
data sheet 19 version 1.00 2016-06-01 TLE4955C-E2 confidential package information 9 package information pure tin covering (green lead platin g) is used. lead frame material is copper based, e.g. k62. (uns:c18090) and contains cusn1crniti. product is ro hs (restriction of hazardous substa nces) compliant and marked with the 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 acco unt team or regional sales if you need further information. figure 11 pin configuration and sensitive area (view on front side with marking of component) figure 12 distance of the chip to the upper package edge
data sheet 20 version 1.00 2016-06-01 TLE4955C-E2 confidential package information figure 13 pg-sso-2-53 (plastic single small outline package) packing, all dimensions in mm
data sheet 21 version 1.00 2016-06-01 TLE4955C-E2 confidential package information figure 14 pg-sso-2-53 package outline, dimensions in mm.
data sheet 22 version 1.00 2016-06-01 TLE4955C-E2 confidential package information figure 15 marking of pg-sso-2-53 for additional packages information, sort of packin g and others, please see infineon internet web page http://www.infineon.com/products table 9 marking description gyyww 123456 g green package 55bic2 yy production year ww production week
data sheet 23 version 1.00 2016-06-01 TLE4955C-E2 confidential revision history page or item subjects (major changes since previous revision) first version of released datasheet
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