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mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 1 of 18 data she et rev 002 mar/12 features and benefits programmable hall effect sensor 12-bit 125hz pwm output signal proportional to the magnetic flux density switch function measurement range from 15mt to 400mt low noise output signal (pwm jitter) programmable through the connector (supply, ground & output) 16 bit customer id number (48 bit mlx id for traceability purposes) soic8 package rohs compliant lead free component, suitable for lead free soldering profile 260c application examples rotary position sensor linear position sensor contactless switch ordering code product code temperature code package code option code packing form code mlx90291 k dc b ca-000 tu mlx90291 k dc b ca-000 re legend : temperature code: k for temperature range -40c to 125c package code: dc for soic8 packing form: tu for tube, re for reel ordering example: mlx90291-kdc-bca-000-tu
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 2 of 18 data she et rev 002 mar/12 1 functional diagram hall bias integrating p2p dido 4 phase switch box fs = 1mhz oscillator 1mhz clock generator i=4x0.35ma s=80mv/t vh=4mv@50mt g=15190 g=4 fs = 1mhz input data rate voltage regulator digital + eeprom rg[2:0] attn2p5 3.3vcore tc1st[6:0] tc2nd[5:0] adc pwmlogic test controller test1 test2 test3 vdd vss 3.3v ana 3.3v dig fc = 1mhz digital clock f = 15khz data conversion rate control lines output program. attenuation by 1or4.5 test5 out test4 reverse polarity protection figure 1: block diagram 2 general description the mlx90291 is a monolithic programmable linear ha ll sensor ic, which can provide a pwm output signal proportional to the externally applied magnetic flu x density or act as a switch with a programmable th reshold level. the transfer characteristic of the mlx90291 is fully programmable (offset, gain, clamping level s, ?).
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 3 of 18 data sheet rev 002 mar/12 3 table of contents 1 functional diagram............................... ................................................... ................................................... ........................................... 2 2 general description ............................. ................................................... ................................................... ............................................ 2 3 table of contents ............................... ................................................... ................................................... ............................................. 3 4 glossary of terms ............................... ................................................... ................................................... ............................................ 4 5 absolute maximum ratings ........................ ................................................... ................................................... ..................................... 4 6 pin definitions and descriptions ................ ................................................... ................................................... ...................................... 4 7 general electrical specifications ............... ................................................... ................................................... ....................................... 5 8 magnetic specification .......................... ................................................... ................................................... ........................................... 5 9 timing specification ............................ ................................................... ................................................... ............................................. 6 10 pwm output specification ....................... ................................................... ................................................... ....................................... 7 11 fault modes .................................... ................................................... ................................................... ............................................... 7 12 programmable items ............................. ................................................... ................................................... ........................................ 8 12.1 parameter table .............................. ................................................... ................................................... ........................................ 8 12.2 output mode configuration (outmode) .......... ................................................... ................................................... ...................... 8 12.3 sensitivity programming (roughgain, finegain) ................................................... ................................................... .............. 8 12.4 offset / output quiescent voltage programming (xa, ya) .......................................... ................................................... ................. 9 12.5 clamping level programming (clamp) ........... ................................................... ................................................... ...................... 10 12.6 bandwidth and filter programming (filtcode) .. ................................................... ................................................... .................. 10 12.7 current limitation (outslope) ................ ................................................... ................................................... ............................ 10 12.8 pwm mode duty cycle definition (dcdef) ....... ................................................... ................................................... .................... 11 12.9 sensitivity and temperature drift programming (tc1st, tc2nd) .................................... ................................................... ......... 12 12.10 offset temperature drift programming (offdrif t) ................................................ ................................................... ............... 12 12.11 functional mode (switch) .................... ................................................... ................................................... ............................ 12 12.12 polarity (platepol) ......................... ................................................... ................................................... ................................. 12 12.13 attenuator (attn2p5) ........................ ................................................... ................................................... ................................ 13 12.14 customer id (cstid) ......................... ................................................... ................................................... ................................ 13 13 recommended application diagrams ............... ................................................... ................................................... ........................... 14 13.1 resistor and capacitor values ................ ................................................... ................................................... ............................. 14 13.2 pull down resistor for diagnostic low ........ ................................................... ................................................... ............................. 14 13.3 pull up resistor for diagnostic high ......... ................................................... ................................................... ............................... 14 14 standard information regarding manufacturability of melexis products with different soldering proce sses .......................................... 15 15 esd precautions ................................ ................................................... ................................................... ......................................... 15 16 package information ............................ ................................................... ................................................... ........................................ 16 16.1 soic8 package dimensions ..................... ................................................... ................................................... ........................... 16 16.2 soic8 pin out and marking .................... ................................................... ................................................... ............................. 16 16.3 soic8 hall plate positioning ................. ................................................... ................................................... ................................ 17 17 disclaimer ..................................... ................................................... ................................................... ............................................... 18
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 4 of 18 data sheet rev 002 mar/12 4 glossary of terms tesla units for the magnetic flux density, 1 mt = 1 0 gauss tc temperature coefficient in ppm/c nc not connected adc analog-to-digital converter ptc programming through connector por power on reset inl integral non linearity dnl differential non linearity pwm pulse width modulation 5 absolute maximum ratings parameter symbol value units positivesupplyvoltage(overvoltage) vdd +20 v reversesupplyvoltageprotection 10 14(200smax,t a =+25 c) v positiveoutputvoltage +10 +14(200smax,t a =+25 c) v output current iout 20 ma reverseoutputvoltage (1) 5 v reverseoutputcurrent (1) 50 ma operatingambienttemperaturerange t a 40to+150 c storagetemperaturerange t s 55to+150 c magneticfluxdensity 10 t table 1: absolute maximum ratings (1) realized through an on-chip resistor along the output line exceeding the absolute maximum ratings may cause pe rmanent damage. exposure to absolute maximum rated conditions for extended periods may affect de vice reliability. 6 pin definitions and descriptions pin name type function 1 vdd supply supplyvoltage 2 vss ground ground voltage 3 test4 n/a mlxtestandfactorycalibration 4 out digital sensoroutputsignal 5 test5 n/a mlxtestandfactorycalibration 6 test3 n/a mlxtestandfactorycalibration 7 test2 n/a mlxtestandfactorycalibration 8 test1 n/a mlxtestandfactorycalibration table 2: pin definition and description ? s08 packa ge it is recommended to connect the mlx test pins to t he ground for optimal emc results. see section 14 f or a recommended application diagram
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 5 of 18 data sheet rev 002 mar/12 7 general electrical specifications operating parameters t a = -40 o c to 125 o c, vdd = 5.0 v, using recommended application diagr am, unless otherwise specified. parameter symbol test conditions min typ max units nominalsupplyvoltage v dd 4.5 5 5.5 v supplycurrent i dd 8 10 ma peaksupplycurrent i ddpeak duringpowerupandpwmswitching 15 ma resetvoltage (por) v por 2.2 2.7 v por thresholdhysteresis v porhyst 0.3 v operatingthreshold(rising) v operating 3.3 3.8 v under voltagethreshold(falling) v under immediatediagnosticlowwithoutreset incaseofrecovery 2.7 3 v operating /under voltagethreshold hysteresis v hyst 0.1 v programmingvoltag e v prog notlockedpart output=highimpedance 6.7 7.4 7.7 (1) v overvoltage detection v over output=highimpedance 7.5 (1) 8.5 v load resistancerange (pull up/down) r l pullupoutto5v 2 4.7 k loadcapacitorrange c l betweenoutandgnd 10 nf outputsaturationvoltage pushpullmode v satpphi i out =+2ma v dd C0.3 v v satpplo i out =C2ma 0.3 v outputsaturationvoltage opendrainmode v satod i out =C2ma output=low(driveron) 0.3 v outputleakagecurrent opendrainmode i leakod v out =+5v output=high(driveroff) 2 10 a outputshortcircuitcurrent i outscgnd currentlimitationfullyon +15 +28 ma i outscvdd currentlimitation fullyon C 2 8 C 15 ma table 3: general electrical parameters (1) no overlap possible at the same temperature 8 magnetic specification operating parameters t a = -40 o c to 125 o c, vdd = 5.0 v, unless otherwise specified. parameter symbol test conditions min typ max units magneticfluxdensityrange b 15 40 400 mt table 4: magnetic specification
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 6 of 18 data sheet rev 002 mar/12 9 timing specification operating parameters t a = -40 o c to 125 o c, vdd = 5.0 v, unless otherwise specified parameter symbol test conditions min typ max units powerupsequence t on1 0v operating &eepromcheckok 1 cycle powersupplyslew rate (external) v ddsr 0.0005 5 v/s eeprom check t eeprom eepromdump+crccheck 0.5 1 ms mainoscillatorfrequency f osc tolerance 10% 921 1024 1127 khz ticktime t tick 0.98 s pwmcycleduration cycle pwm 2 13 t tick 8 ms pwmoutputfrequency f pwm f osc /2 13 125 hz samplingfrequency f sample analogsampling fosc conversionrate @f osc =1024khz f conv measurement:40analogsamples conversion(adc):25s 70 s lowpassfiltering(firstorderfilter) @f osc =1024khz @3db f filter filtcode=9 filtcode=8 filtcode=7 filtcode=6 filtcode=5 filtcode=4 filtcode=3 filtcode=2 4 9 17 35 70 139 279 557 hz outputslopecurrentgenerator i slope outslope=0 outslope=1 outslope=2 outslope=3 4 6 11 20 ma table 5: timing specification of the analog output
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 7 of 18 data sheet rev 002 mar/12 10 pwm output specification operating parameters t a = -40 o c to 125 o c, vdd = 5.0 v, unless otherwise specified parameter symbol test conditions min typ max units pwmoutputclamping s cg pwm clamp=0 clamp=1 clamp=2 clamp=3 clamp=4 clamp=5 clamp=6 1 4 5 6 7 8 9 99 96 95 94 93 92 91 %dc pwmoutputoffset p w m oq programmingrange 0 100 %dc pwmoutputoffsetresolution p w m oqres programmingresolution 0.025 %dc pwmoutputslope (orsensitivityorgain) s 10%90%swing 0.1 1 6.4 %dc/mt pwmoutputslope resolution s res %ofslopetargetvalue(finegain) 0.025 % pwmresolution lsb pwm 12bits 0.0125 %dc switchlowlevelthreshold range switch lo switchmodeprogrammingrange 0 100 % switchhighlevel threshold range switch hi switchmodeprogrammingrange 0 100 % switchprogrammingresolution switch re switchmoderesolution 0.025 % pwm linearity dnl pwm inl pwm 13bitsresolution 40mtC1%dc/mt 1 2 1 2 lsb pwm pwmjitter j it pwm s=1%dc/mt f pwm =125hz filtersetting:m=32 C2 +2 lsb pwm pwmclampingaccuracy c lamp acc C2 +2 lsb pwm intrinsicoffsetthermaldrift t offset 25cto 40c 25cto125c C0.1 +0.1 mt thermalsensitivitydrift t s aftercalibration@mlx fulltemperaturerange C150 0 +150 ppm/c sensitivitythermalcoefficient resolution res incrementaltcadjust 5bitsover 800ppm/c 50 ppm/c table 6: pwm output specification 11 fault modes operating parameters t a = -40 o c to 125 o c, vdd = 5.0 v, unless otherwise specified parameter symbol test conditions min typ max units outputsignalinfaultstate fault out eepromparityfail pullresistor=5k 4 v parityfailcriterion n parity successivecrcfailsbefore diagnosticisset 2 count brokenvss vbr vss pullupresistor=5k 4 v brokenvdd vbr vdd pullupresistor=5k 4 v table 7: fault modes
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 8 of 18 data sheet rev 002 mar/12 12 programmable items 12.1 parameter table parameter bits comment outmode 1 pushpulloropendrainoutput drive roughgain 3 roughgainpreamplifier finegain 13 digitalfinegain adjustment from 3.999to+3.999 xa 14 offsetbeforegain ya 15 offsetaftergain,(xa,ya)definesthe zero gausspoint clamp 3 clamphighandclamplowlevel filtcode 4 digital outputf ilter outslope 2 outputslopecontrol dcdef 1 pwmdutycycledefinition tc1st 7 sensitivitytemperaturedriftcorrection1 st order tc2nd 6 sensitivitytemperaturedriftcorrection2 nd order offdrift 6 residualoffsetcorrection switch 1 pwm/switchmode platepol 1 invertsensitivitysign att n 2p5 1 attenuatorblockswitch cst id 16 melexisid table 8: customer programmable items 12.2 output mode configuration (outmode) outmode configures the output driver. outmode output driver 0 pwmopen drain 1 pwmpush pull table 9: output configuration 12.3 sensitivity programming (roughgain, finegain) roughgain[2:0] this 3-bit register controls the gain of the pre-am plifier. ? the msb controls the enable of the preamp function with a gain of 4.3 (~2ma extra i dd ) ? the 2 lsb control the gain of the mainamp
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 9 of 18 data sheet rev 002 mar/12 value typical gain 0 15.0 1 21.6 2 31.1 3 44.8 4 64.5 5 92.9 6 133.7 7 192.6 table 10: roughgain versus amplifier gain finegain[12:0] value defines the digital gain adjustment ? the code 1024 corresponds to a gain of 1 ? the msb is the sign bit which acts as a polarity b it ? finegain gain range is from -3.9999 to +3.99999 12.4 offset / output quiescent voltage programming (xa, ya) xa[13:0] pwm mode: offset trimming before finegain block switch mode: threshold for the output to switch ya[14:0] pwm mode: offset trimming after finegain block switch mode: hysteresis for the output to switch both parameters together define the zero gauss poin t in pwm mode in switch mode, xa is used to set the threshold and ya to set the hysteresis case ya > 0 case ya < 0 output state adc<4.xaC16.ya adc<4.xa settozero adc>4.xa adc>4.xa16.ya settoone otherwise otherwise unchanged table 11: output state as function of xa and ya in switch mode
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 10 of 18 data sheet rev 002 mar/12 12.5 clamping level programming (clamp) clamp[2:0] defines the clamping level of the pwm ou tput clamp minimal output [%dc] maximal output [%dc] 0 1 99 1 4 96 2 5 95 3 6 94 4 7 93 5 8 92 6 9 91 7 10 90 table 12: clamp parameter versus output. 12.6 bandwidth and filter programming (filtcode) filtcode[3:0] allows adjusting the internal bandwid th of the sensor in order to optimize for speed or resolution. filtcode cut off frequency [hz] attenuation [db] tau [ms] 2 557 8.0 0.29 3 279 11.2 0.57 4 139 14.4 1.14 5 70 18.1 2.29 6 35 22.4 4.57 7 17 27.1 9.14 8 9 32.3 18.29 9 4 38.1 36.57 table 13: filtcode settings pwm mode 12.7 current limitation (outslope) 2 bit register to set the current limitation for sl ew rate control outslope current limitation [ma] 0 4 1 6 2 11 3 20 table 14: current limitation
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 11 of 18 data sheet rev 002 mar/12 12.8 pwm mode duty cycle definition (dcdef) the pwm duty cycle definition is as follows. dcdef pwm duty cycle definition 0 tlow / (tlow + thigh) 1 thigh / (tlow + thigh) table 15: pwm duty cycle definition period1 period2 out dcdef=1 t on t off out time period1 period2 out dcdef=0 t on t off out time figure 2: two different pwm modes figure 3: power-on behaviour of the two different m odes
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 12 of 18 data sheet rev 002 mar/12 12.9 sensitivity and temperature drift programming (tc1st, tc2nd) tc1st[6:0] programming first order sensitivity temperature dri ft value typical 1 st order tc 0 +2740ppm/c 63or64 0ppm/c 127 2950ppm/c table 16: tc1st parameter tc2nd[5:0] programming second order sensitivity temperature dr ift value typical 2 nd order tc 0or32 0ppm/c2 31 +6.8ppm/c2 63 6.1ppm/c2 table 17: tc2nd parameter 12.10 offset temperature drift programming (offdrif t) offdrift[5:0] parameter defines the offset behaviou r over temperature (1 st order) value offset drift correction 0or32 0mv/c 31 +0.9mv/c 63 0.9mv/c table 18: offdrift parameter versus correction 12.11 functional mode (switch) value offset drift correction 0 pwmoutputmode 1 switchoutputmode table 19: switch parameter 12.12 polarity (platepol) platepol parameter changes the sign of the measured sensitivity default value = 0
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 13 of 18 data sheet rev 002 mar/12 12.13 attenuator (attn2p5) switch to control the attenuation block in the sign al path value attn2p5 0 attenuationfactor=1 1 attenuationfactor=4.5 table 20: attenuation settings 12.14 customer id (cstid) 16-bit customer programmable id
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 14 of 18 data sheet rev 002 mar/12 13 recommended application diagrams 13.1 resistor and capacitor values part description value unit c1 decoupling,emi,esd 10 nf c2 supplycapacitor,emi,esd 100 nf r1 pulluporpulldownresistor 4.7 k table 21: resistive and capacitive values for the r ecommended application diagrams 13.2 pull down resistor for diagnostic low figure 4: diagnostic low 13.3 pull up resistor for diagnostic high figure 5: diagnostic high
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 15 of 18 data sheet rev 002 mar/12 14 standard information regarding manufacturabili ty of melexis products with different soldering processes our products are classified and qualified regarding soldering technology, solderability and moisture s ensitivity level according to following test methods: reflow soldering smd?s (s urface m ount d evices) ? ipc/jedec j-std-020 moisture/reflow sensitivity classification for nonh ermetic solid state surface mount devices (classification reflow profiles according to table 5-2) ? eia/jedec jesd22-a113 preconditioning of nonhermetic surface mount device s prior to reliability testing (reflow profiles according to table 2) wave soldering smd?s (s urface m ount d evices) and thd?s (t hrough h ole d evices) ? en60749-20 resistance of plastic- encapsulated smd?s to combin ed effect of moisture and soldering heat ? eia/jedec jesd22-b106 and en60749-15 resistance to soldering temperature for through-hol e mounted devices iron soldering thd?s (t hrough h ole d evices) ? en60749-15 resistance to soldering temperature for through-hol e mounted devices solderability smd?s (s urface m ount d evices) and thd?s (t hrough h ole d evices) ? eia/jedec jesd22-b102 and en60749-21 solderability for all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature, temperature gradient, temperature prof ile etc) additional classification and qualificatio n tests have to be agreed upon with melexis. the application of wave soldering for smd?s is allo wed only after consulting melexis regarding assuran ce of adhesive strength between device and board. melexis recommends reviewing on our web site the ge neral guidelines soldering recommendation ( http://www.melexis.com/quality_soldering.aspx ) as well as trim&form recommendations (http://www.melexis.com/assets/trim-and-form-recomm endations-5565.aspx). melexis is contributing to global environmental con servation by promoting lead free solutions. for more information on qualifications of rohs compliant products (rohs = european directive on t he restriction of the use of certain hazardous substances) please vis it the quality page on our website: http://www.melexis.com/quality.aspx 15 esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). always observe electro static discharge control pro cedures whenever handling semiconductor products.
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 16 of 18 data sheet rev 002 mar/12 16 package information 16.1 soic8 package dimensions figure 6: package dimensions 16.2 soic8 pin out and marking figure 7: pin out and marking
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 17 of 18 data sheet rev 002 mar/12 16.3 soic8 hall plate positioning figure 8: hall plate positioning
mlx90291 smd programmable linear hall sensor ic featuring pwm output 3901090291 page 18 of 18 data sheet rev 002 mar/12 17 disclaimer devices sold by melexis are covered by the warranty and patent indemnification provisions appearing in its term of sale. melexis makes no warranty, express, s tatutory, implied, or by description regarding the information set forth herein or regarding the freed om of the described devices from patent infringemen t. melexis reserves the right to change specifications and prices at any time and without notice. therefo re, prior to designing this product into a system, it is nece ssary to check with melexis for current information . this product is intended for use in normal commercial ap plications. applications requiring extended tempera ture range, unusual environmental requirements, or high reliability applications, such as military, medical life- support or life-sustaining equipment are specifical ly not recommended without additional processing by melexis for each application. the information furnished by melexis is believed to be correct and accurate. however, melexis shall no t be liable to recipient or any third party for any dama ges, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequ ential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the t echnical data herein. no obligation or liability to recipien t or any third party shall arise or flow out of mel exis? rendering of technical or other services. ? 2012 melexis nv. all rights reserved. for the latest version of this document, go to our website at www.melexis.com or for additional information contact melexis direc t: europe, africa, asia: america: phone: +32 1367 0495 phone: +1 248 306 5400 e-mail: sales_europe@melexis.com e-mail: sales_usa @melexis.com iso/ts 16949 and iso14001 certified

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