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data sheet, v 4.0, 2010-04 tle4953 TLE4953C differential two-wire hall effect sensor ic sensors
edition 2010-04 published by infineon technologies ag, 81726 mnchen, germany ? infineon technologies ag 6/25/10. 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 lif e-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 safe ty 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.
tle4953 TLE4953C revision history: 2010-04 v 4.0 previous version: v 3.0 page temperature profile adjustment TLE4953C package change maximum value of the differential direction limit added storage temperature info provided by application notes: storage of products supply by infineon te chnologies we listen to your comments any information within this do cument that you feel is wron g, 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 th is document) to: sensors@infineon.com
data sheet 1 v 4.0, 2010-04 data sheet v4.0 differential two-wire hall e ffect sensor ic tle4953 TLE4953C features ? two-wire pwm current interface ? detection of ro tation direction ? dynamic self-calibration principle & high sensitivity ? adaptive hysteresis ? single chip solution - no external components ? vibration suppressio n in calibrated mode ? south and north pole pre-induction possible ? high resistance to piezo effects ? large operating air-gaps ? wide operating temperature range ? from zero spe ed up to 12 khz ? 1.8 nf overmolded capacitor ? for coarse transmission target wheels the differential hall effect sensor tle4953 is designed to prov ide information about rotational speed a nd direction of rotation to modern transmission and abs systems. the output has been designed as a two wire current interface based on a pulse width modulation principle. the se nsor operates without exter nal components and combines a fast power-up time with a wi de frequency range. excellent accuracy and sensitivity is specified for harsh automotive requirements as a wide temperat ure range, high esd robustness and high emc resilien ce. state-of-the-art bicmos technology is used for monolithic integration of the active sensor areas a nd the signal conditioning. finally, the optimi zed piezo compensation and the integrated dynamic offset compensation enable easy manuf acturing and elimin ation of magnetic offsets. adaptive hysteresis concept increases the noise immunity. the TLE4953C is additionally provided with an overmolded 1.8 nf capacitor for improv ed emi performance. type marking order code package TLE4953C 53c1r sp000710696 pg-sso-2-4 tle4953 53 sp000278512 pg-sso-2-1 tle4952 series
tle4953 TLE4953C data sheet 2 v 4.0, 2010-04 pin configuration (top view) figure 1 figure 2 block diagram aep03191-53 dat e code mar ki ng v cc gnd 2.5 2.67 1.44 center of sensi ti ve area 0.15 gyywws 53c1r v cc gnd - + - + l eft r ight c entr pga a/d slope/peak detection offset calc. - (r+l)/2-c output protocol system control & watchdog - d/a supply generator clock gen. hall probes: lp comp d/a tracking algor. + noise shaper dig. filter direction algorithm -
tle4953 TLE4953C data sheet 3 v 4.0, 2010-04 functional description the differential hall effect ic detects th e motion of ferromagneti c or permanent magnet structures by measuring the differential flux density of the magneti c field. to detect the motion of ferromagnetic objects the magnetic field must be provided by a backbiasing permanent magnet. either the so uth or north pole of the mag net can be atta ched to the rear, unmarked side (rema rk: rear side may contain data matrix code) of the ic package. magnetic offsets of up to 20 mt and mech anical offsets are ca ncelled out through a self-calibration algori thm. only 2 transitions are nece ssary for the se lf-calibration procedure. after the initial self-calibration sequence switching o ccurs when the input signal crosses the adapti ve threshold on the ri sing magnetic edge. the on and off state of the ic are indicated by high and low current consumption. each rising magnetic edge of the magnetic input si gnal triggers an output pulse. figure 3 output pulses on magnetic rising edge in addition to the speed signa l, the following information is provided by varying the length of the output pulse s (pwm modulation): speed signal = s the speed signal is issu ed at the first output pulse afte r start up and w hen the magnetic frequency is above 1khz. direction of rotation left = dr-l dr-l information is issued in the output pulse length when the active target wheel in front of the hall effect ic moves from the pin v cc to the pin gnd. direction of rotation right = dr-r dr-r information is issued in the output pulse length when the acti ve target wheel in front of the hall effect ic mo ves from the pin gnd to the pin v cc . aed03189 pulse length magnetic signal output signal
tle4953 TLE4953C data sheet 4 v 4.0, 2010-04 figure 4 definition of rotation direction circuit description the circuit internally is supplied by a voltage regulator. a 2 mhz on-c hip oscillator serves as a clock generator for the dsp and the output encoder. speed signal circuitry tle4953 speed sign al path comprises a pair of hall effect probes, separated from each other by 2.5 mm, a differential amplif ier including nois e limiting low-pass filter, and a comparator triggering a switched current outp ut stage. an offset cancellation feedback loop is provided thro ugh a signal-tracking a/d converter, a digi tal signal processor (dsp), and an offset ca ncellation d/a converter. uncalibrated mode occasionally a short initia l offset se ttling time t d,input might delay the dete ction of the input signal. (the sensor is "blind"). during the startup phase (un-calib rated mode) the output is disabled ( i = i low ). the magnetic inpu t signal is tracked by the speed adc and monitored within the digital ci rcuit. for detection the signal needs to exceed a threshold (digital noise constant d1). when the signal sl ope is identified as a rising edge, a trigger pulse is issued to a comparat or. a second trigger pulse is issued as soon as the next rising edge is detected. between the start-up of the magnetic input signa l and the time when its second extreme is reached, the pga (programma ble gain amplifier) will switch to its appropriate position. this value is determined by th e signal amplitude an d initial offset valu e. the digital noise constant value is ch anging accord ingly (d1 d2, related to th e corresponding pga aea03193 dr-l dr-r g 0415 s 53c1r n s s s s s n n n n
tle4953 TLE4953C data sheet 5 v 4.0, 2010-04 states), leading to a change in phase shift between magnet ic input signal and output signal. after that consecutive output edges should have a nominal delay of about 360. during the uncalibrated mode the offset value is calc ulated by the peak detection algorithm as described below. the differential input signal is digitized in the speed a/ d converter and fe d into the dsp part of the circuit. the minimu m and maximum values of t he input signal are extracted and their correspo nding arithmetic mean value is calculated. th e offset of this mean value is determined and fed into the offset canc ellation dac. the offset update take s place when two valid extremes are found and the direction of the update has the same orientation as the magnetic slope (valid for calibrated mode). for example an positive offset update is only possible on a rising magnetic edge. the offset update is done in dependant from the output switching. after successful correction of the offset, the output swit ching is in ca librated mode. switching occurs at adaptive th reshold-crossover. it is only affected by the propagation delay time of the sig nal path, which is main ly determined by the noise limiting filter. signals which are below a predefined threshold ? b limit are not detected. this prevents unwanted switching. the adaptive hysteresis is linked to the pg a state. therefore the system is able to suppress switching if vibration or noise signals ar e smaller than the a daptive hysteresis. the switching and direction information is fe d into the dsp and the output encoder. the pulse length of the high output current is generated ac cording to the ro tational speed and the direction of rotation. direction signal circuitry the differential signal betwe en a third hall probe and the mean value 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 digital circui try. there, the phase of the signal referring to the speed signal is analyzed and the dire ction information is forwarded to the output encoder. the phase is identified by calculat ing the size of the di rection signal at two consecutive zero crossings of the speed signal. this is done by subtracting the current direction signal from the in ternal stored value which has been taken from the previous magnetic edge. depending on the phas e shift between the di rection signal and the speed signal a positive or a negative value occur. the inform ation if the new direct ion calculation takes place at a rising or a falling ma gnetic edge allows together wi th the algebraic sign of the calculated directi on signal a reliable direction detection. the first pulse after power is always a speed pulse as th ere is no stored direction information available.
tle4953 TLE4953C data sheet 6 v 4.0, 2010-04 vibration suppression algorithm: the magnetic signal amplitud e and the direction informatio n is used for detection of parasitic magnetic signals. unwanted magnetic signals can be caus ed by angular or airgap vibrations for instance. if an input signal is clearly de tected as a vi bration signal, the output of pulses will be suppressed. a magnetic input signal is classifi ed as parasitic vibration signal if a. the speed signal amplitude is smal ler than the internal hysteresis or b. the direction signal amplitude is smaller th an the internal limit or c. the direction signal consists of alternating left/right information the quality of vibration supp ression (according a & b) depend s on the hysteresis limits and on the magnitude of the magnetic signal. the bigger t he hysteresis the better the suppression of parasitc signals. for parasitic signals where item s above (a. to c.) are not clear ly applicable or at other more rare cases (e.g. ic startup) vibration suppressi on is not guaranteed. the performance of the direction detection and vibrat ion suppression algo rithm depends on the used magnetic circ uit and as well on the used targ et wheel and need to be evaluated. please ask for application support if you have questions on the vibration suppresion algorithm. package information: pure tin covering (green lead plating) is used. lead frame material is wieland k62 (uns: c18090) and contains cusn1c rniti. product is rohs ( r estriction o f h azardous s ubstances) compliant and marked with letter g in fron t of the data code marking and may contain a data matrix co de on the rear side of the pa ckage (see also information note 136/03). please re fer to your key accoun t team or regional sale s if you need further information.
tle4953 TLE4953C data sheet 7 v 4.0, 2010-04 note: stress in excess of those listed here may cause permanent da mage to the device. exposure to absolute maximum rating cond itions for extended periods may affect device reliability. absolute maximum ratings t j = -40 to 150 c, 4.0v v cc 16.5 v parameter symbol limit values unit remarks min. max. supply voltage v cc ? 0.3 ? v t j 80 c ? 16.5 t j = 170 c ? 20 t j = 150 c ? 22 t = 10 5 min ? 24 t = 10 5 min, r m 75 ? included in v cc ? 27 t = 400 ms, r m 75 ? included in v cc reverse polarity current i rev ? 200 ma external current limitation required, t 4 h 1) 1) this allows together with an external serial resistor (75 or 1 00 ohm) reverse polarity voltage for a short duration. this resistor is usually present in th e ecu of the application circuit. junction temperature t j ? 150 c 5000 h, v cc 16.5 v ? 160 2500 h, v cc 16.5 v (not additive) ? 170 500 h, v cc 16.5 v (not additive) ? 190 4 1 h, v cc 16.5 v active lifetime 2) 2) life time shall be considered as anticipati on and will not extend th e agreed warranty period t b,active ? 10000 h -40c to 125c thermal resistance pg-sso-2-4, pg-sso-2-1 r thja ? 190 k/w 3) 3) can be improved significantly by further processing like overmolding
tle4953 TLE4953C data sheet 8 v 4.0, 2010-04 esd protection characterized according to human body model (hbm) te sts in compliance with standard eia/jesd22-a114-b hbm (covers mil std 883d) ) note: within the operating range the functions given in the circuit description are fulfilled. parameter symbol limit values unit notes min. max. esd-protection TLE4953C tle4953 v esd - - 12 12 kv r = 1.5 k ? , c = 100 pf operating range parameter symbol limit values unit remarks min. max. supply voltage v cc 4.5 20 v directly on ic leads excludes the r m voltage drop supply voltage v cc 4.0 4.5 v directly on ic leads excludes the r m voltage drop 1) 1) reduced performance possible for jitter/phase accuracy and power supply rejection ratio (e mc). current levels will typically decrease but will be within specification limits. this voltage range is not recommended for continuos operation and should cover the function during short voltage drops which may occur at cranking of engine / test pulse 4. supply voltage ripple v ac ? 6 vpp v cc = 13 v 0 f 50 khz junction temperature t j or ? 40 150 c 170 500h v cc 16.5 v 2) 2) increased jitter and re duced phase accuracy permissible between 150 and 170c junction temperature. pre-induction b 0 ? 500 + 500 mt pre-induction offset between outer probes ? b stat., l/r ? 20 + 20 mt l-r pre-induction offset between mean of outer probes and center probe ? b stat., m/o ? 20 + 20 mt (l+r)/2-c differential induction ? b ? 120 + 120 mt
tle4953 TLE4953C data sheet 9 v 4.0, 2010-04 ac/dc characteristics all values specified at constant amplitude and off set of input signal, over operating range, unless otherwise specified. typical values correspond to v cc =12v and t a =25c parameter symbol limit values unit remarks min. typ. max. supply current i low 5.9 7 8.4 ma supply current i high 11.8 14 16.8 ma supply current ratio i high / i low 1.9 ? ? output rise/fa ll slew rate tle4953 t r , t f 12 ? 26 ma/s r m = 75 ? t j 170 c see figure 5 output rise/fa ll slew rate TLE4953C t r , t f 8 ? 26 ma/s r m = 75 ? t j 170 c see figure 5 current ripple d i x /d v cc i x ? ? 90 a/v only valid for tle4953 limit threshold speed 0hz f 2500 hz 2500 hz f 12000 hz ? b limit 0.35 0.8 1.5 1.75 mt 1) limit differential direction signal 0hz f 1100 hz ? b dir 0.35 0.73 mt calculated at two consecutive threshold crossings 2) initial calibration delay time t d,input ? 300 345 s additional to n start magnetic edges required for first output pulse (no previous vibration detected) n start ? ? 2 magn. edges pulse occurs only on rising magnetic edge number of pulses in uncalibrated mode n dz-startup 2 pulses 3 rd pulse calibrated number of emitted pulses with invalid direction information 3) n dr-start ? ? 2 4) pulses 3 rd pulse correct frequency f 0 ? 12000 hz 4)
tle4953 TLE4953C data sheet 10 v 4.0, 2010-04 systematic phase error of output edges during start-up and uncalibrated mode ? 88 + 88 systematical phase error of "uncal" pulse; nth vs. n+1th pulse (does not include jitter) phase shift during transition from uncalibrated to calibrated mode ? switch ? 90 + 90 phase shift change during pga switching in calibrated mode 0 80 due to adaptive hysteresis. depending on signal shape. magnetic diffe rential field change required for startup with 1st rising edge ? ? b limit, early startup peak to peak value ? ? b limit, early startup 3.5 mt jitter, t j 150 c t j 170 c f 2500 hz s jit-far ? ? ? ? 2 3 % 5) 1 value v cc = 12 v ? b 2 mt jitter, t j 150 c t j 170 c 2500 hz < f 12000 hz s jit-far ? ? ? ? 3 4.5 % 5) 1 value v cc = 12 v ? b 2 mt jitter at board net ripple s jit-ac ? ? 2 % 5) v cc = 13 v 6 vpp 0 f 50 khz ? b = 15 mt 1) magnetic amplitude values, sine magnetic field, limits refer to the 50% cr iteria. 50% of pulses are missing.only valid at lowest pga stage/highest amplification because of adaptive hysteresis. 2) magnetic peak to peak value. limits refer to the 99% criteria, just 1 pulse missing out of 100. 3) the first 2 pulses may contain only direct ion information if the di rection signal is above ? b dir .the first pulse after starting will be the speed pulse. 4) high frequency behaviour not subj ect to production test - verifi ed by design/characterization. ac/dc characteristics (cont?d) all values specified at constant amplitude and of fset of input signal, ov er operating range, unless otherwise specified. typical values correspond to v cc =12v and t a =25c parameter symbol limit values unit remarks min. typ. max.
tle4953 TLE4953C data sheet 11 v 4.0, 2010-04 figure 5 definition of rise and fall time pwm current interface between each magnetic transi tion and the rising edge of the correspond ing output pulse the output current is low for t pre-low in order to allow reliab le internal conveyance. following the signal pulse (current is high ) is output. 5) not subject to production test- verified by design/c haracterization, ma gnetic values are amplitude values timing characteristics parameter symbol limit values unit remarks min. typ. max. pre-low length t pre-low 24 30 36 s speed signal t s 24 30 36 s length of dr-l pulse t dr-l 50 60 70 s length of dr-r pulse t dr-r 102 120 138 s output of dr-l/r pulse, maximum frequency from low - high frequency from high - low frequency f dr, max 935 850 1100 1000 1265 1150 hz internal hysteresis of direction signal 1) 1) not possible overlap, 10% difference ve rified by design/characterization. freque ncies not subject to production test verified by design/ characterization aet03194 t 10% 90% 50% t r t f i high i low t 1 i
tle4953 TLE4953C data sheet 12 v 4.0, 2010-04 if the magnetic direction field exceeds ? b dir , the output pulse lengths are 60 s or 120 s respectively, depending on the direction of rotation. if the magnitude of the magnetic direct ion field is below ? b dir , the output pulses are suppressed when the frequency is below f dr,max (see section vibratio n suppression). for magnitudes of the magnetic differential field below ? b limit the signal is lost. speed pulse occur only at the first pulse after start up or above f dr, max . if no magnetic differential sign al change is detected the ic will remain in calibrated mode. no internal reset ar e generated - therefore a zero speed operation is possible. figure 6 definition of pwm current interface aet03196 t pre-low = 30 ? xn xn+1 xn+ 2 t s = 30 ? t dr-l = 2 x t s t dr-r = 4 x t s t ransferred s ignal: d r-r t ransferred s ignal: d r-l t ransferred s ignal: s i nternal s ensor s peed signal
tle4953 TLE4953C data sheet 13 v 4.0, 2010-04 electro magnetic compatibility (values depend on r m !) characterization of electro ma gnetic compatibility are carri ed out on sample base of one qualification lot. not all specification pa rameters have been mo nitored during emc exposure. only key parameter s as e.g. switching curre nt have been monitored parameter symbol level/typ status ref. iso 7637-1; test circuit 1; ? b = 2 mt (amplitude of sinus signal); v cc = 13.5 v, f b = 100 hz; t = 25 c; r m 75 ? testpulse 1 testpulse 2 testpulse 3a testpulse 3b testpulse 4 testpulse 5 v emc 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 r m =75 ? only. mainly the current consumption will de crease. status c with test circuit 1. 3) applying in the board net a suppressor diode with sufficient energy absorption capability. ref. iso 7637-3; test circuit 1; ? b = 2 mt (amplitude of sinus signal); v cc = 13.5 v, f b = 100 hz; t = 25 c; r m 75 ? testpulse 1 testpulse 2 testpulse 3a testpulse 3b v emc iv / ? 30 v iv / 30 v iv / ? 60 v iv / 40 v a a a a ref. iso 11452-3; test circui t 1; measured in tem-cell ? b = 2 mt; v cc = 13.5 v, f b = 100 hz; t = 25 c emc field strength (tle4953) e tem-cell iv / 200 v/m am = 80%, f = 1 khz emc field strength (TLE4953C) e tem-cell iv / 250 v/m am = 80%, f = 1 khz
tle4953 TLE4953C data sheet 14 v 4.0, 2010-04 figure 7 test circuit 1 figure 8 package outlines aes03199 gnd v cc sensor r m c 2 v emc emc-generator mainframe d1 c 1 d2 components: d1: 1n4007 d2: t 5z27 1j c 1 : 10 f/35 v c 2 : 1 nf/1000 v r m :75 ? /5 w p-sso-2-1/2 : 0.3 d : distance chip to branded side of i c mm ?.08 aea0296 1 hall-probe branded side d
tle4953 TLE4953C data sheet 15 v 4.0, 2010-04 0.1 6.35 ?.4 12.7 ?.3 ?.3 4 code 1 x 45? 12.7 ? code code -0.1 1 0.25 ?.05 7? 7? 0.2 +0.1 adhesiv e ?.5 6 1 -1 ?.5 18 tape 0.39 ?.1 -0.15 0.25 9 ?.5 23.8 +0.75 -0.5 38 max. 3.38 3.71 (0.25) ?.08 ?.06 1.9 max. 5.16 ?.08 5.34 ?.05 0.1 max. 1.9 max. 1.2 ?.1 ?.05 0.87 ?.05 1.67 (14.8) 2.54 2 a a 2x 1 ) no solder function area total tolerance at 10 pitches ? (useable length) tape ?? 12 0.2 2x 0.5 1 max. 1) pg-sso-2-1 (plastic sing le small outline package) dimensions in m m
tle4953 TLE4953C data sheet 16 v 4.0, 2010-04 6.35 ?.4 12.7 ?.3 ?.3 4 code 1 x 45? 12.7 ? code code -0.1 1 0.25 ?.05 7? 7? 0.2 +0.1 adhesiv e ?.5 6 1 -1 ?.5 18 tape 0.39 ?.1 -0.15 0.25 9 ?.5 23.8 +0.75 -0.5 38 max. 0.65 3.38 3.71 (0.25) ?.1 ?.08 ?.06 1.9 max. 5.16 ?.08 5.34 ?.05 0.1 max. 1.9 max. 1.2 ?.1 ?.05 0.87 ?.05 1.67 (14.8) 1) 3.01 2.54 2 a a b 1) no solder function area total tolerance at 10 pitches ? (useable length) ?.5 2.2 1.5 ?.05 (2.4) (2.7) (1.3) 5.34 ?.05 tape 1.81 ?.05 0.2 2x 2x 0.5 1.2 ?.05 5.16 ?.08 a - a aa capacitor (8.17) ?.1 7.07 10.2 ?.1 (2.2) ?.05 0.25 0.2 b ?? 12 0.2 0.1 2x pg-sso-2-4 (plastic sing le small outline package) dimensions in mm you can find al l of our packages, sorts of packing and others in our infineon internet page ?products?: http://www.infine on.com/products.
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