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mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 1 of 13 data sheet rev 010 jun/09 features and benefits triaxis? hall technology sensitive to a magnetic field parallel to the ch ip surface very high sensitivity linear output voltage proportional to a m a gnetic field wideband: dc to 100khz short response time 8 s low offset and offset drift very low noise isolated from current conductor surface mount soic8 package applications examples ac and/or dc contactless current me asurement wideband magnetic field measurement battery management ac/dc converters motor control solar power converter (mppt) power management ordering information p art no. temperature code package code option code mlx91205kdc-lb (-40c to 125c) dc (soic) MLX91205KDC-HB (-40c to 125c) dc (soic) 1 functional diagram co_out biasing u nit offset c ancellation modulator amplifier demodulator buffer calibration unit pv pc pd a_out gnd vdd nc tria
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 2 of 13 data sheet rev 010 jun/09 table of contents 1 functional diagram ......................................................................................................... 1 2 general description ........................................................................................................ 1 3 glossary of terms .......................................................................................................... 3 4 maximum ratings ............................................................................................................ 3 5 pin definitions and descriptions.................................................................................... 3 6 mlx91205 general electrical specifications ................................................................ 4 mlx91205 sensor specific specifications ..................................................................... 4 7........................................................................................................................................... 4 7.1 91205 lb: low field version 10mt (marking xxl) .......................................................................................................................... 4 7.2 91205hb: high field version 25mt (marking xxh) ......................................................................................................................... 5 8 detailed general description ......................................................................................... 6 9 unique features.............................................................................................................. 6 10 performance graphs .................................................................................................... 7 10.1 offset over temperature .............................................................................................................................................................. 7 10.2 sensitivity over temperature ........................................................................................................................................................ 7 1 1 applications information.............................................................................................. 8 11.1 low current measurement up to 2 a ........................................................................................................................................... 8 11.2 medium current up to 30 a ......................................................................................................................................................... 8 11.3 high current measurement up to 600 a ...................................................................................................................................... 8 11.4 customer calibration with mcu.................................................................................................................................................... 8 1 2 application diagram ..................................................................................................... 9 12.1 direct single ended output .......................................................................................................................................................... 9 12.2 direct differential output .............................................................................................................................................................. 9 1 3 standard information regarding manufacturability of melexis products with different soldering processes......................................................................................... 10 14 esd precautions ......................................................................................................... 11 15 package information................................................................................................... 11 15.1 package dimensions.................................................................................................................................................................. 11 15.2 pinout and marking .................................................................................................................................................................... 12 15.3 hall plate positioning .................................................................................................................................................................. 12 1 6 disclaimer.................................................................................................................... 13
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 3 of 13 data sheet rev 010 jun/09 3 glossary of terms gauss (g), tesla (t): magnetic flux density units where 1 mt = 10 g. a dc: analog-to-digital converter tc: sensitivity temperature coefficient (in ppm/deg.c.). tria is tm : the tria i s? technology refers to the melexis hall technology that is based on both planar and vertical (bulk & imc) hall plates. this technology allows the realization of hall effect sensors able to sense the flux density along the 3 axis (i.e. x, y & z) as well as position sensors able to sense the magnetic vector over 360 degrees. imc: integrated magneto concentrator. it concentrates the magnetic flux lines and bends them at the extremity under the planar hall plate. furthermore, it can provide some magnetic gain factor. 4 maximum ratings parameter units supplyvoltage,v dd (overvoltage) 6v supplyvoltage,v dd (operating) 5.5v reversevoltageprotection 0v operatingtemperaturerange,t a 40to+ 125 c storagetemperaturerange,t s 40to+1 5 0 c table 1: absolute maximum ratings exceeding the absolute maximum ratings may cause permanent damage. exposure to absolute maximum rated conditions for extended periods may affect device reliability. 5 pin definitions and descriptions pin number pin name function 1 a_out analogoutput 2 vdd supply 3 nc 4 pv factoryprogrammingpin(defaultvdd) 5 gnd supplycommon 6 pd f actory p r ogramming pin(defaultgnd) 7 pc f actory p rogramming pin(defaultvdd) 8 co_out commonoutput(vdd/2) pin 1 table 2: pin description mlx91205 magnetic sensitive direction b
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 4 of 13 data sheet rev 010 jun/09 6 mlx91205 general electrical specifications dc operating parameters t a = -40 o c to +125 o c, v dd = 5.000v (unless otherwise specified) parameter symbol test conditions min typ max units nominalsupplyvoltage vdd 4.5 5 5.5 v supplycurrent idd iout=0ma 10 16 ma commonoutput co_out referringtovdd/2 50 vdd/2 +50 mv outputcurrent iout 1 1 ma outputloadresistance rload 5 k outputloadcapacitance cload 1000 pf startupcycle ts 150 s table 3: electrical specifications 7 mlx91205 sensor specific specifications 7.1 91205 lb: low field version 10mt (marking xxl) dc operating parameters t a = -40 o c to 125 o c, v dd = 5.000v, differential output (i.e. vout = a_out - co_out), u nloaded. unless otherwise specified. parameter. symbol test conditions min typ max units magneticsensitivity s (1) t=25c,b=b l 2 75 280 285 v/t magneticsensitivityovertemp. s t ( 1) t= 40,25,125c ; seealsobelow10.2 260 280 300 v/t thermalsensitivitydrift tc t= 25c < +/ 200 ppm /c offsetvoltage voff t=25c 20 0 20 mv offsetvoltageovertemperature voff t t=40,25,125c; s eealsobelow 10.1 50 0 50 mv linearmagneticfieldrange b l 7.5 7.5 mt fullscalemagneticfieldrange b fs 10 mt nonlinearity nl bb fs 5 95 %vdd responsetime tr 8 s bandwidth(3db)dcto bw r load >1m ; c load <10pf 100 khz spectralnoisedensity bnoise f=10hz to 10khz <125 nt/sqrt(hz) table 4: sensor specifications 10mt version (low-field version) note 1: ratiometric (proportional to vdd). the absolute accuracy on magnetic sensitivity trimming is +/- 2%. n ote 2: deviation to a best fit straight line, related full linear input range, i.e. 15mt.
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 5 of 13 data sheet rev 010 jun/09 7.2 91205hb: high field version 25mt (marking xxh) dc operating parameters t a = -40 o c to 125 o c, v dd = 5.000v, differential output (i.e. vout = a_out - co_out), u nloaded. unless otherwise specified. parameter. symbol test conditions min typ max units magneticsensitivity s (1) t=25c,b=b l 9 8.5 100 101.5 v/t magneticsensitivityovertemp. s t ( 1) t= 40,25,125c; seealsobelow10.2 93 100 107 v/t thermalsensitivitydrift tc t=25c <+/ 200 ppm/c offsetvoltage voff t=25c 20 0 20 mv offsetvoltageovertemperature voff t t =40,25,125c; seealsobelow 10.1 50 0 50 mv linearmagneticfieldrange b l 20 20 mt fullscalemagneticfieldrange b fs 25 mt nonlinearity nl bb fs 5 95 %vdd responsetime tr 8 s bandwidth(3db)dcto bw r load >1m ; c load <10pf 100 khz spectralnoisedensity bnoise f=10hz to 10khz <125 nt/sqrt(hz) table 5: sensor specifications 25mt version (high-field version) note 1: ratiometric (proportional to vdd). the absolute accuracy on magnetic sensitivity trimming is +/- 2%. n ote 2: deviation to a best fit straight line, related full linear input range, i.e. 40mt.
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 6 of 13 data sheet rev 010 jun/09 8 detailed general description melexis imc current sensor mlx91205 is a single axis magnetic field sensor based on the hall effect. it is an i ntegrated combination of a cmos hall circuit and a thin ferromagnetic concentrator. the cmos circuit contains two pairs of hall elements for its sensitivity direction parallel with the chip surface. the ferromagnetic concentrator amplifies the external magnetic field and concentrates it on the hall elements. the mlx91205 is ideally suited for current sensing in harsh automotive and industrial environments for both ac and dc currents. it produces an analog, linear, ratio-metric output voltage proportional to the applied magnetic field parallel with the chip surface. the circuit is fabricated using a standard cmos process and the ferromagnetic layer is added in a simple post-processing step. the monolithic device incorporates hall elements, offset cancellation circuitry, current source, chopper stabilized amplification circuitry, parameter programming capability. by dynamic offset cancellation any offset voltage caused by temperature variations, packaging stress or others is strongly reduced. as a result, the device has an extremely stable signal output, is immune to mechanical stress and is virtually immune to temperature cycling. therefore, the circuit features a wide application range and very high accuracy. 9 unique features different to other linear hall sensors the mlx91205 measures the magnetic field parallel with the chip s urface. therefore this sensor is ideally used as an open-loop current sensor for pcb mounting. it features small size application design and a simple construction for various current ranges. due to short response time and high bandwidth this sensor is suitable for high speed current measurement in a contactless, high current, high voltage setup.
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 7 of 13 data sheet rev 010 jun/09 10 performance graphs 10.1 offset over temperature the product is calibrated at room temperature and tested at -40c, 25c and +125c. the offset p erformance 0v 20mv at room temperature and is 0v 50mv over the temperature range from -40 to 125 c. the typical temperature drift is < 0mv/c 0.3 mv/c
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 8 of 13 data sheet rev 010 jun/09 11 applications information 11.1 low current measurement up to 2 a low currents can be measured with the mlx91205 by i ncreasing the magnetic field via a coil around the sensor. the sensitivity (output voltage vs. current in coil) of the measurement will depend on the size of coil and number of turns. additional sensitivity and increased immunity to external fields can be gained by adding a shield around the coil. the bobbin provides very high dielectric isolation making this a suitable solution for high voltage power supplies with relative low currents. the output should be scaled to obtain the maximum voltage for the highest current to be measured in order to obtain the best accuracy and resolution. 11.2 medium current up to 30 a with a single conductor located on the pcb, currents in the r ange of up to 30 amps can be measured. the sizing of the pcb trace needs to take into account the current handling capability and the total power dissipation. the pcb trace needs to be thick enough and wide enough to handle the rms current continuously. the differential output voltage for this configuration can be approximated by the following equation: vout = typ. 35 - 40 mv/a * i for a current level of 30 a, the output will be approximately 1050 mv. 11.3 high current measurement up to 600 a another method of measuring high currents on pcb?s is to u se a large thick gauge copper trace capable of carrying the current on the opposite side of the pcb. the mlx91205 should be located near the centre of the trace, however because the trace is wide, the output is less sensitive to location on the pcb. this configuration also has less sensitivity due to the distance and width of the conductor. 11.4 customer calibration with mcu in many applications one measures the output voltage of the 91205 with a microcontroller. the current- s ensor-system accuracy can be significantly increased by customer calibration of the system after assembling the 91205 in the application. by applying a known current i.e.100 amperes, one can calibrate by means of the microcontroller the output voltage to the exact value i.e. 2.000v at 100 amps. by doing so, the offset and sensitivity can be calibrated simply at a certain temperature.
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 9 of 13 data sheet rev 010 jun/09 12 application diagram 12.1 direct single ended output for reliable operation within the specifications the sensor must be connected as follows:
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 10 of 13 data sheet rev 010 jun/09 13 standard information regarding manufacturability of melexis products with different soldering processes melexis devices are qualified using state-of-the-art practices in accordance with automotive and e nvironmental requirements. through qualifications, various soldering techniques are considered; please refer to ?soldering recommendations for melexis products? ( http://www.melexis.com/asset/soldering_application_n o te_and_recommendations_downloadlink_5446.as px ) for more information. for components normally soldered using surface mounted device techniques (eg: reflow process), melexis has defined and qualified moisture sensitivity level and peak temperature in accordance with the jedec j- std-020 standard. delivered material is conditioned accordingly. moisture sensitivity level and peak temperature information can be found on the label identifying the material. in case you intend to use a reflow soldering process for through hole devices (melexis? package codes: sa, ua, va, vk, vm), please contact melexis to verify your soldering process compatibility. the application of wave soldering for smd?s is allowed only after consulting melexis regarding assurance of adhesive strength between device and board. based on melexis commitment to environmental responsibility, europe legislations (direction on the restriction of the use of certain hazardous substances, rohs) and customer requests, melexis has deployed pb free leadfinish (typically matte tin) on all assp products. for through hole devices (melexis? package codes: sa, ua, va, vk, vm) trim&form, please refer to ?trim & form recommendations for melexis products? ( http://www.melexis.com/assets/trim_and_form_recommen d ations_downloadlink_5565.aspx ) for more information.
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 11 of 13 data sheet rev 010 jun/09 14 esd precautions electronic semiconductor products are sensitive to electro static discharge (esd). a lways observe electro static discharge control procedures whenever handling semiconductor products. a well designed (capacitors close to pins and low resistive ground layout) pcb layout will help to improve esd robustness. 15 package information 15.1 package dimensions 0.19 0.25 notes: all dimensions are in millimeters (anlges in degrees). * dimension does not include mold flash, protrusions or gate burrs (shall not exceed 0.15 per side). ** dimension does not include interleads flash or protrusion (shall not exceed 0.25 per side). *** dimension does not include dambar protrusion. allowable dambar protrusion shall be 0.08 mm total in excess of the dimension at maximum material condition. dambar cannot be located on the lower radius of the foot. 5.84 6.20** 1.27 typ 4.80 4.98* 1.55 1.73 0.127 0.250 1.40 1.55 0.35 0.49*** 3.81 3.99** 0 8 0.41 0.89
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 12 of 13 data sheet rev 010 jun/09 15.2 pinout and marking top marking : p artnumbermlx91205(5digits) 91205 d ieversion(2digits) x=lforlowfieldversion x=hforhighfieldversion abx l otnumber(5digits) weekdatecode(2digits) yeardatecode(2digits) yy ww
mlx91205 imc current sensor (triaxis? technology) 3901091205 p age 13 of 13 data sheet rev 010 jun/09 16 disclaimer devices sold by melexis are covered by the warranty and patent indemnification provisions appearing in its t erm of sale. melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. melexis reserves the right to change specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with melexis for current information. this product is intended for use in normal commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life- support or life-sustaining equipment are specifically 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 not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. no obligation or liability to recipient or any third party shall arise or flow out of melexis? rendering of technical or other services. ? 2009 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 direct: europe, africa, asia: america: phone: +32 1367 0495 phone: +1 603 223 2362 e -mail: sales_europe@melexis.com e-mail: sales_usa@melexis.com i so/ts 16949 and iso14001 certified

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