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never stop thinking. advanced sensors data sheet, v 2.0, may 2004 tle4990 programmable linear output hall sensor tle4990_photo
edition 2004-05 published by infineon technologies ag, st.-martin-strasse 53, 81669 mnchen, germany ? infineon technologies ag 2004. 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 hu man 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.
tle4990 programmable linear hall sensor table of contents page data sheet 3 v 2.0, 2004-05 1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 summary of features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 target applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.3 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 zero-field output voltage ( vzero) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 magnetic sensitivity (s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 temperature gain compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 clamping option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 transfer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 electrical and magnetic parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 electrical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 magnetic parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6 signal processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.1 magnetic field ranges (fixed in -e6782 version) . . . . . . . . . . . . . . . . . . . 13 range register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 gain setting (fixed in -e6782 version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 gain register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.3 offset setting (fixed in -e6782 version) . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 offset register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.4 clamping (not enabled in -e6782 version) . . . . . . . . . . . . . . . . . . . . . . . . 16 7 error detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 8 calibration and fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 data transfer protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 programming of sensors with common supply lines . . . . . . . . . . . 18 sensor interface tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 9 application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 10 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
tle4990 programmable linear hall sensor overview data sheet 4 v 2.0, 2004-05 1overview 1.1 summary of features ? very linear and ratiometric rail-to-rail output signal with push-pull output ? temperature compensation ? low drift of output signal over temperature and lifetime ? programmable parameters stored in fuse memory: ? magnetic range and magnetic sensitivity (gain) ? zero field voltage (offset) ? clamping option ? temperature coefficient (calibrated and fused during production) ? memory lock ? working over temperatures from -40 c up to 150 c ? single supply voltage 4.5 - 5.5 v ? continuous measurement ranges between -200 mt and +200 mt or 0 and 400 mt ? very slim 4-pin package with only 1mm thickness ? reverse polarity and overvoltage protection for all pins ? output short circuit protection ? on-board diagnostics (wire breakage detection) ? individual programming and operation of multiple sensors with common power supply ? two point calibration of magnetic transfer function 1.2 target applications ? robust replacement of potentiometers ? no mechanical abrasion ? resistant to humidity, temperature, pollution, and vibration ? linear and angular position sensing in automotive applications like pedal position, suspension control, valve or throttle position, headlight levelling, and steering angle ? high current sensing for battery management, motor control, and electronic fuse 1.3 ordering information type ordering code package tle4990 q62705-k417 1) 1) standard type p-sso-4-1 tle4990-e6782 q62705-k668 2) 2) completely calibrated and fused p-sso-4-1 TLE4990-E6785 q62705-k741a 3) 3) temperature coefficient 0 ppm/c p-sso-4-1
tle4990 programmable linear hall sensor functional description data sheet 5 v 2.0, 2004-05 2 functional description pin configuration figure 1 shows the location of the hall element in the chip. figure 1 pin configuration and hall cell location table 1 pin definitions and functions pin no. symbol function 1 tst test pin, must be grounded 2 out output voltage / programming interface 3 gnd ground 4 v dd supply voltage / programming interface tle4990_pinout hall probe 2.69 tst out gnd v dd 0.3 0.08 mm center of sensitive area 0.15 mm 1.53 branded side
tle4990 programmable linear hall sensor functional description data sheet 6 v 2.0, 2004-05 general the linear hall ic tle4990 has been designed specifically to meet the demands of highly accurate rotation and position detection, as well as for current measurement applications. the sensor provides a ratiometric analog output voltage which is ideally suited for a/d conversion with the supply voltage as a reference. the ic is produced in bicmos technology with high voltage capability and also providing reverse polarity protection. zero-field output voltage ( v zero ) the output voltage with no magnetic field present is called the zero field voltage v zero . it is programmable within the range of 3% to 19% of v dd (for bipolar bit = 0) and 40% to 60% of v dd (for bipolar bit = 1) by 10 odac bits with a resolution of 1.0 mv to 1.2 mv. magnetic sensitivity (s) the magnetic sensitivity is set in two steps: first the "coarse gain" is selected out of 8 values (3 pre bits). then the "fine gain " is adjusted by another 10 gdac bits. the resulting range of sensitivity extends from 15 mv/mt to 180 mv/mt at the nominal supply voltage of 5 v. note that as the sensit ivity is ratiometric, it will also depend linearly on the supply voltage. the sensitivity of the -e6782 version is programmed during production. it is calibrated to a value of 20 mv/mt at the nominal supply voltage of 5 v. temperature gain compensation the temperature compensation of the sensitivity is programmed during production. the value of +350 ppm/c to provides an excellent accuracy for the use of a smco permanent magnet. stability is achieved by the dynamic offset cancellation technique to eliminate any spurious mechanical or temperature effects. the -e6785 version is calibrated to 0 ppm/c. it can be used e.g. for current measurement applications. clamping option it is possible to reduce the output voltage swing from its original 3% ... 97% v dd to a limited swing of 10% ... 90% v dd by setting the clamping bit. this allows to detect a broken wire. in this case the output voltage is tied to 6% or 94% of v dd . the -e6782 version has this feature disabled.
tle4990 programmable linear hall sensor functional description data sheet 7 v 2.0, 2004-05 block diagram figure 2 shows a simplified block diagram. figure 2 block diagram principle of operation ? a magnetic flux is measured by a hall-effect cell. ? the temperature compensation modulates the bias current of the hall cell. ? the output signal from the hall-effect cell is amplified. ? a zero field voltage is added. ? the output voltage range can be clamped by limiters. ? the final output value is amplified and buffered. ? the output voltage is proportional to the supply voltage (ratiometric bahaviour). ?an obd ( o n b oard d iagnistics) circuit connects the output to v dd or gnd in case of errors. otprom/ram interface temperature linearization zero magnetic field voltage clamping amplifier, buffer clock gain modulator chopped hallprobe sample & hold out + demodulator
tle4990 programmable linear hall sensor functional description data sheet 8 v 2.0, 2004-05 transfer functions the examples in figure 3 show how different magnetic field ranges can be mapped to the output voltage. ? polarity mode: ? unipolar : only magnetic fields in one direction are measured. the zero field voltage is near to the gnd level. ? bipolar : magnetic fields can be measured in both orientations. the zero field voltage is about the half voltage. figure 3 examples of operation figure 4 magnetic field direction definition example 1: bipolar, example 2: unipolar setting used in -e6782 version tle4990_magnetic_range 0 5 125 -125 5 50 -50 v out (v) v out 0 b (mt) v out (v) b (mt) 2.5 0 0 increase of b : increase of v out increase of b : decrease of v out tle4990 field direction b b
tle4990 programmable linear hall sensor absolute maximum ratings data sheet 9 v 2.0, 2004-05 3 absolute maximum ratings note: stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any ot her conditions above those indicated in the operational sections of this specificat ion is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. during absolute maximum rating overload conditions ( v in > v dd or v in < v ss ) the voltage on v dd pins with respect to ground ( v ss ) must not exceed the values defined by the absolute maximum ratings. table 2 absolute maximum rating parameters 1) 1) only valid if the memlock bit is set and the tst pin is connected to gnd. parameter symbol limit values unit notes min. max. storage temperature t st -40 150 c junction temperature t j -40 160 c voltage on v dd pins with respect to ground ( v ss ) v dd -18 24 v for t a 80 c max. 10 min. voltage on output pin with respect to ground ( v ss ) v outov 0.3 16 for t a 80 c max. 5 min. magnetic field b max - unlimited t esd protection v esd - 2.0 kv according hbm jesd22-a114-b
tle4990 programmable linear hall sensor operating range data sheet 10 v 2.0, 2004-05 4 operating range the following operating conditions must not be exceeded in order to ensure correct operation of the tle4990. all pa rameters specified in the following sections refer to these operating conditions, unless otherwise noticed. table 3 operating condition parameters 1) 1) keeping signal levels within the limits specified in this table, ensures operation without overload conditions. parameter symbol limit values unit notes min. max. supply voltage v dd 4.5 5.5 v load resistance r l 4.7 7 - k ? for obd parameters 2) 2) obd= o n b oard d iagnostics (see table 12 ). load capacitance c l 0 50 nf 3) 3) a minimum capacitance of 1 nf is recommended in order to improve the emc behaviour. ambient temperature 4) 4) r thja 150 k/w t a -40 150 c
tle4990 programmable linear hall sensor electrical and magnetic parameters data sheet 11 v 2.0, 2004-05 5 electrical and ma gnetic parameters electrical parameters table 4 electrical characteristics parameter symbol limit values unit notes min. typ. max. output voltage range v out 3- 97% of v dd r load 4.7 k ? supply current i dd 3.5 - 5.5 ma i out = 0 ma 1) 1) valid for v out in the range from 10% to 90% v dd . output current i out -1.2 - 1.2 ma output resistance r out -311.2 ? 1) zero field voltage v zero 3 42 - - 18 59 % v dd bipolar-bit = 0 2) 3) bipolar-bit = 1 2) 3) 2) not for the -e6782 version. 49.95 50 50.05 only version -e6782 3) 3) @ 25 c zero field voltage drift ? v zero -10 - 10 mv over lifetime -30 - 0 -40c t < 25c -30 - 0 25c t 150c -40 - 0 -40c t 150c 4) 4) for sensitivity s < 80 mv/mt, for higher sensitivities the zero field drift is dominant (see table 5 ). ratiometry rat 99.8 100 100.2 % 5) 5) definition: rat = ( v out ( v dd ) / v dd ) / ( v out ( v dd = 5 v) / 5 v) x 100% for v out in the range from 10% v dd to 90% v dd . power on time t pon 0.3 0.6 0.75 ms 6) 6) the output voltage has reached 99% of its final value within t pon after power on. max. phase shift error err 2 4 8 degree @ 100 hz sine input output noise v noise -1.2- mv rms 7) 7) no external filtering, with a sensitivity of 30 mv/mt (digital switching noise included) @ 25 c. maximum operating frequency f op 1.1 1.6 2.3 khz -3 db corner frequency
tle4990 programmable linear hall sensor electrical and magnetic parameters data sheet 12 v 2.0, 2004-05 magnetic parameters table 5 magnetic characteristics parameter symbol limit values unit notes min. typ max. sensitivity s 15 - 180 mv/mt programmable for tle4990 and TLE4990-E6785 1) 2) 1) @ v dd = 5 v 2) in the lowest programmable sensitivity range a sensitivity less or equal to min(s) is guaranteed. in the highest programmable sensitivity range a sensitivity of greater or equal to max(s) is guaranteed. the ratio of max(s) / min(s) 15. 19.8 20 20.2 mv/mt version -e6782 1) 3) 3) @ 25 c magnetic field range mfr 13.05 - 204.5 mt bipolar-bit =1 4) 4) not for the -e6782 version. 26.1 - 409 bipolar-bit =0 4) 115.8 117.5 118.2 version -e6782 linearity lin 99.9 100 100.1 % 5) 5) b 10% is the magnetic field, at which v out = 0.1 x v dd . b 90% is the magnetic field, at which v out = 0.9 x v dd . v out,id = [0.1 + 0.8 x ( b - b 10% ) / ( b 90% - b 10% )] x v dd . lin = ( v out / v out,id - 1) 100% for all v out between 10% v dd and 90% v dd . temperature coefficient of sensitivity 200 350 500 ppm/ c tle4990 and tle4990-e6782 6) 6) the temperature coefficient of the magnetic sensitivity is the slope of a linear least-square fit through the real curve. -150 0 150 TLE4990-E6785 6) sensitivity drift over lifetime ? s l -0.9 - 0.9 % t a = 25 c zero field drift over temperature ? b 0 -500 - 150 t valid for s > 80 mv/mt 7) 7) for lower sensitivities, the zero voltage drift is dominant (see table 4 ). resolution b n 20 - 60 t rms 8) 8) equivalent to magnetic input noise at 25 c. the equivalent magnetic input noise depends on the selected sensitivity. at highest sensitivity it is typically 25 t rms , at lowest sensitivity it is typically 50 t rms at 25 c.
tle4990 programmable linear hall sensor signal processing data sheet 13 v 2.0, 2004-05 6 signal processing 6.1 magnetic field ranges (fixed in -e6782 version) the output signal of the hall cell is amplified in the pre-amplifier. eight ranges can be selected by setting the pre bits. the output voltage range of 3 ... 97% of v dd leads to a swing of 4.7 v at v dd = 5 v. therefore the product of sensitivity and full scale range is always 4.7 v. sensitivity x full scale range = 4.7 v[1] i in the bipolar mode, the full scale range is composed of a postive and a negative part with the half value each. (e.g. 142.4 mt ... 204.4 mt in range 0). note: the range should be set before the calibration of the gain. range register table 6 range setting range pre bits sensitivity (mv/mt) typical values magnetic full scale range (mt) pre2 pre1 pre0 min. max. min. max. 0 0 0 0 11.49 16.49 285 409 1 0 0 1 16.17 23.20 203 291 2 0 1 0 22.75 32.65 144 207 3 0 1 1 32.00 45.96 102 147 4 1 0 0 45.04 64.63 72.7 104 5 1 0 1 63.38 90.92 51.7 74.2 6 1 1 0 89.16 127.9 36.8 52.7 7 1 1 1 125.5 180.0 26.1 37.5 pre (preamplifier) 2 1 0 pre2 ... pre0
tle4990 programmable linear hall sensor signal processing data sheet 14 v 2.0, 2004-05 6.2 gain setting (fixed in -e6782 version) the sensitivity is defined by the range (preamp) and the gain setting. the output of the preamlifier is multiplied with the gain value. the sensitivity can be set in 1024 steps. gain register table 7gain parameter symbol limit values unit notes min. max. register size - 10 bit gain range - 1 1.43 - gain 9876543210 g9 ... g0 table 8 gain register setting gain g remark dec. bin. (g9 ... g0) 1 0 0000000000 minimum gain 1.43 1023 1111111111 maximum gain
tle4990 programmable linear hall sensor signal processing data sheet 15 v 2.0, 2004-05 6.3 offset setting (fixed in -e6782 version) the offset voltage corresponds to an output voltage with zero field at the sensor. it can be set in 1024 steps in two different voltage ranges. offset register table 9 offset parameter symbol limit values unit notes min. max. register size - 10 bit offset range - 3 40 19 60 % of v dd bipolar-bit = 0 1) 2) bipolar-bit = 1 1) the -e6782 version is programmed to 50% v dd . offset quantization steps ? v os 0.97 1.22 mv bipolar-bit = 0 2) bipolar-bit = 1 2) v dd = 5 v offset 9876543210 os9 ... os0 table 10 offset register setting offset os bip remark dec. bin. (os9 ... os0) 3% of v dd 0 0000000000 0 unipolar 40% of v dd 0 0000000000 1 bipolar 19% of v dd 1023 1111111111 0 unipolar 60% of v dd 1023 1111111111 1 bipolar
tle4990 programmable linear hall sensor signal processing data sheet 16 v 2.0, 2004-05 6.4 clamping (not enabled in -e6782 version) the clamping function is useful to split the output voltage range into operating range and error ranges. if the magnetic field is outside the selected measurement range, the output voltage v out is limited to the clamping values. therefore an output voltage in the error range indicates a wire breakage (see open circuit (obd parameters) , table 12 ) or a short circuit. the clamping function is enabled, when the clamp bit is set. the following figure shows how the magnetic field range between b min and b max is mapped to voltages between 0.5 v and 4.5 v. if it is not necessary to signal errors, the clamping should be disabled. in this case the maximum output voltage range between 0.3 v and 4.7 v can be used. figure 5 clamping table 11 clamping ranges parameter symbol limit values unit notes min. max. clamping voltage low v cl,low 8 12 % of v dd 1) clamping voltage high v cl,high 88 92 % of v dd 1) 1) r load 4.7 k ? 0 1 b min b b max v out (v) 5 2 4 3 error range error range operating range v cll v clh
tle4990 programmable linear hall sensor error detection data sheet 17 v 2.0, 2004-05 7 error detection broken supply lines can be detected by the obd ( o n b oard d iagnostics) and reported to the controller. note: the obd is only useful when the clamping function is enabled. in the case of interrupted supply lines, the controller may warn the user. if two sensors are placed in parallel, the output of the remaining working sensor may be still used for an emergency operation. table 12 open circuit (obd parameters) parameter symbol limit values unit notes min. max. output voltage @ open v dd line v out 0 6 % v dd 1) 1) with r l 7 k ? output voltage @ open v ss line v out 94 100 % v dd 1)
tle4990 programmable linear hall sensor calibration and fusing data sheet 18 v 2.0, 2004-05 8 calibration and fusing usually the sensor is calibrated ?end of line?, when the complete magnetic system is assembled. this compensates all magnetic and mechanical tolerances. note: the -e6782 version is already programmed completely. the contents of the calibration otp memory may not be changed furthermore. during the calibraton the internal settings are stored in a ram. when the right values are found, the information has to be stored in an one-time-programmable memory (otp). this otp memory consists of cavity fuses. after fusing all bits, setting the memlock bit closes the memory. this prevents from unwanted memory changes after the calibration data transfer protocol a separate programming specification may be requested. programming of sensors with common supply lines in many automotive applications two sensors are used to measure the same parameter. this redundancy allows to continue the operation in an emergency mode. if both sensors use the same power supply lines, they have to be programmed together. sensor interface tool for the calibration of the sensor, a special hardware interface to a pc is required.
tle4990 programmable linear hall sensor application circuit data sheet 19 v 2.0, 2004-05 9 application circuit figure 6 shows the connection of multiple sensors to a -controller. figure 6 application circuit tle4990_application_circuit optional 4.7nf 4.7nf 10k 10k c voltage tr acke r e.g. tle4250 ref adc ref adc in1 adc in2 adc gnd tle 4990 out v dd gnd tst 4.7nf 4.7nf tle 4990 out v dd gnd tst
tle4990 programmable linear hall sensor package outlines data sheet 20 v 2.0, 2004-05 10 package outlines p-sso-4-1 figure 7 package outline tle4990_package_outlines
tle4990 programmable linear hall sensor data sheet 21 v 2.0, 2004-05 tle4990 revision history: 2004-05 v 2.0 previous version: v 1.0 2001-09-19 page subjects (major changes since last revision) all completely new layout, more information 4 additional versions (-e6782 and -e6785) 11 zero voltage drift 12 zero field drift 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
tle4990 programmable linear hall sensor data sheet 22 v 2.0, 2004-05
tle4990 programmable linear hall sensor data sheet 23 v 2.0, 2004-05
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