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AS5262 12-bit magnetic angle position sensor www.ams.com revision 1.1 1 - 36 1 general description the AS5262 is a contactless magnetic angle position sensor for accurate angular measurement over a full turn of 360. a sub range can be programmed to achieve the best resolution for the application. it is a system-on-chip, combining integrated hall elements, analog front end, digital signal processing and best in class automotive protection features in a single device. to measure the angle, only a simple two-pole magnet, rotating over the center of the chip, is required. the magnet may be placed above or below the ic. the absolute angle measurement provides instant indication of the magnet?s angular position with a resolution of 0.022 = 16384 positions per revolution. according to this resolution the adjustment of the application specific mechanical positions are possible. the angular output data is available over a 12 bit ratiometric analog output. the AS5262 operates at a supply voltage of 5v and the supply and output pins are protected against overvoltage up to +20v. in addition the supply pins are protected against reverse polarity up to ?20v. figure 1. typical arrangement of AS5262 and magnet 2 key features ?? 360o contactless high resolution angular position sensing ?? user programmable start and end point of the application region + linearization. ?? user programmable clamping levels and programming of the transition point. ?? powerful analog output - short circuit monitor - high driving capability for resistive and capacitive loads ?? wide temperature range: - 40c to + 150c ?? small pb-free package: mlf 16 6x6 (with dimple) ?? broken gnd and vdd detection over a wide range of different load conditions. ?? saw tooth mode 1,2,3,4 slopes per revolution 3 benefits ?? unique fully differential patented solution ?? best protections for automotive applications ?? easy to program ?? additional linearization points for output characteristic ?? ideal for applications in harsh environments due to contactless position sensing ?? robust system, tolerant to magnet misalignment, air gap variations, temperature variations and external magnetic fields ?? high inherent accuracy ?? high driving capability of analog output (including diagnostics) ?? broken gnd and vdd detection for all external load cases 4 applications the AS5262 is ideal for automotive applications like throttle and valve position sensing, gearbox position sensor, tumble flap, chassis height level, pedal position sensing and contactless potentiometers.
AS5262 datasheet - applications www.ams.com revision 1.1 2 - 36 figure 2. AS5262 block diagram 12 12-bit dac AS5262 otp register (programming parameters) sin cos hall array frontend amplifier adc controller high voltage/ reverse polarity protection single pin interface (uart) out driver dsp cordic vdd_t vdd_b gnd_t gnd_b out_t out_b vdd3v3_t vdd3v3_b
AS5262 datasheet - contents www.ams.com revision 1.1 3 - 36 contents 1 general description ......................................................................................................... ......................................................... 1 2 key features................................................................................................................ ............................................................. 1 3 benefits.................................................................................................................... ................................................................. 1 4 applications................................................................................................................ ............................................................... 1 5 pin assignments ............................................................................................................. .......................................................... 4 5.1 pin descriptions.......................................................................................................... .......................................................................... 4 6 absolute maximum ratings .................................................................................................... .................................................. 5 7 electrical characteristics.................................................................................................. ......................................................... 6 7.1 operating conditions...................................................................................................... ...................................................................... 6 7.2 magnetic input specification.............................................................................................. ................................................................... 6 7.3 electrical system specifications.......................................................................................... ................................................................. 7 7.4 timing characteristics .................................................................................................... ...................................................................... 8 7.5 power management - supply monitor ......................................................................................... ......................................................... 8 8 detailed description........................................................................................................ .......................................................... 9 8.1 operation................................................................................................................. ............................................................................. 9 8.1.1 vdd voltage monitor ..................................................................................................... .............................................................. 9 8.2 analog output............................................................................................................. .......................................................................... 9 8.2.1 programming parameters.................................................................................................. ........................................................ 10 8.2.2 application specific angular ra nge programming .......................................................................... .......................................... 10 8.2.3 application specific programming of the break point ..................................................................... .......................................... 11 8.2.4 full scale mode ......................................................................................................... ................................................................ 11 8.2.5 multiple slope output ................................................................................................... ............................................................. 12 8.2.6 linearization of the output............................................................................................. ............................................................ 13 8.2.7 resolution of parameters ................................................................................................ .......................................................... 13 8.2.8 analog output diagnostic mode ........................................................................................... ..................................................... 15 8.2.9 analog output driver parameters......................................................................................... ..................................................... 15 8.2.10 noise suppressor ....................................................................................................... ............................................................. 16 8.2.11 hysteresis function .................................................................................................... ............................................................. 16 9 application information ..................................................................................................... ...................................................... 16 9.1 recommended application schematic......................................................................................... ...................................................... 16 9.2 programming the AS5262 .................................................................................................... .............................................................. 18 9.2.1 uart interface for programming .......................................................................................... .................................................... 18 9.2.2 frame organization ...................................................................................................... ............................................................. 18 9.2.3 write (command description) ............................................................................................. ................................................... 20 9.2.4 read (command description).............................................................................................. .................................................... 21 9.2.5 baud-rate automatic detection........................................................................................... ....................................................... 21 9.2.6 baud-rate manual setting (optional) ..................................................................................... ..................................................... 21 9.3 otp programming data ...................................................................................................... ............................................................... 23 9.4 read / write register map................................................................................................. ............................................................ 27 9.5 read only register map.................................................................................................... ............................................................... 28 9.6 special registers......................................................................................................... ....................................................................... 30 9.7 programming procedure ..................................................................................................... ............................................................... 31 10 package drawings and markings .............................................................................................. ........................................... 32 11 ordering information ....................................................................................................... ...................................................... 35
AS5262 datasheet - pin assignments www.ams.com revision 1.1 4 - 36 5 pin assignments figure 3. mlf-16 pin configuration (view from top) 5.1 pin descriptions table 1. mlf-16 pin descriptions pin number pin name pin type description 1tp1_t dio/aio multi purpose pin test pin for fabrication. connected to ground in the application. 2 tp1_b test pin for fabrication. connected to ground in the application. 3vdd3v3_t aio output of the ldo. 1f required. 4 vdd3v3_b output of the ldo. 1f required. 5gnd_t supply pin ground pin. connected to ground in the application. 6 gnd_b ground pin. connected to ground in the application. 7tp2_t dio/aio multi purpose pin test pin for fabrication. connected to ground in the application. 8 tp2_b test pin for fabrication. connected to ground in the application. 9tp3_t test pin for fabrication. left open in the application. 10 tp3_b test pin for fabrication. left open in the application. 11 s_t aio test pin for fabrication. connected to out_t in the application. ( special case for the connection possible 4-wire mode) 12 s_b test pin for fabrication. connected to out_b in the application . ( special case for the connection possible ? 4-wire mode) 13 out_t analog output pin output pin analog output. over this pin the programming is possible. 14 out_b output pin analog output. over this pin the programming is possible. 15 vdd_t supply pin positive supply pin. this pin is over voltage protected. 16 vdd_b positive supply pin. this pin is over voltage protected. tp1_t tp1_b vdd3v3_t vdd3v3_b 16 13 14 15 5 8 7 6 1 4 3 2 12 9 10 11 s_b s_t tp3_b tp3_t gnd_t gnd_b tp2_t tp2_b vdd_b out_t out_b vdd_t epad
AS5262 datasheet - absolute maximum ratings www.ams.com revision 1.1 5 - 36 6 absolute maximum ratings stresses beyond those listed in table 2 may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in electrical characteristics on page 6 is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. table 2. absolute maximum ratings symbol parameter min max units comments electrical parameters v dd dc supply voltage at pin vdd overvoltage -20 20 v no operation v out output voltage out -0.3 20 v permanent v diff voltage difference at pin vdd and out -20 20 v v dd3v3 dc supply voltage at pin v dd3v3 -0.3 5 v i scr input current (latchup immunity) -100 100 ma norm: aec-q100-004 electrostatic discharge esd electrostatic discharge 2 kv norm: aec-q100-002 temperature ranges and storage conditions t strg storage temperature -55 +150 oc min -67of; max +257of t body body temperature 260 oc the reflow peak soldering temperature (body temperature) specified is in accordance with ipc/jedec j-std-020 ?moisture/reflow sensitivity classification for non-hermetic solid state surface mount devices?. the lead finish for pb-free leaded packages is matte tin (100% sn). h humidity non-condensing 5 85 % msl moisture sensitive level 3 represents a maximum floor life time of 168h
AS5262 datasheet - electrical characteristics www.ams.com revision 1.1 6 - 36 7 electrical characteristics 7.1 operating conditions in this specification, all the defined tolerances for external components need to be assured over the whole operation condition s range and also over lifetime. 7.2 magnetic input specification t amb = -40 to +150oc, vdd = 4.5 to 5.5v (5v operation), unless otherwise noted. two-pole cylindrical diamet rically magnetized source: table 3. operating conditions symbol parameter conditions min typ max units t amb ambient temperature -40 +150 oc i supp supply current only for one die. must be multiplied by 2 12 ma v dd supply voltage at pin vdd 4.5 5.0 5.5 v table 4. magnetic input specification symbol parameter conditions min typ max units b pk magnetic input field amplitude required vertical component of the magnetic field strength on the die?s surface, measured along a concentric circle with a radius of 1.25 mm 30 70 mt b pkext magnetic input field amplitude (extended) default setting required vertical component of the magnetic field strength on the die?s surface, measured along a concentric circle with a radius of 1.25 mm. increased sensor output noise. 10 90 mt b off magnetic offset constant magnetic stray field 5 mt field non-linearity including offset gradient 5 % d isp displacement radius offset between defined device center and magnet axis. dependent on the selected magnet. including eccentricity. 1mm
AS5262 datasheet - electrical characteristics www.ams.com revision 1.1 7 - 36 7.3 electrical syst em specifications t amb = -40 to +150oc, vdd = 4.5 - 5.5v (5v operation), magnetic input specification , unless otherwise noted. figure 4. power-up timing diagram table 5. electrical system specifications symbol parameter conditions min typ max units res resolution analog output range > 90 o 1lsb=1.221mv typ 12 bit inl opt integral non-linearity (optimum) best aligned reference magnet at 25oc over full turn 360o. 0.5 deg inl temp integral non-linearity (optimum) best aligned reference magnet over temperature -40 -150o over full turn 360o. 0.9 deg inl integral non-linearity best aligned reference magnet over temperature -40 -150o over full turn 360o and displacement 1.4 deg dnl differential non-linearity monolitic 0.05 deg on output noise (360o segment) 1 lsb after filter peak/peak rms value 0.2 %/vdd t pwrup power-up time 0-5v see figure 4 10 ms t delay system propagation delay absolute output: delay of adc, dsp and absolute interface 10kohm, 100 f rc filter 300 s out pin in hiz first valid data on out pin t pwrup 4.5v vdd
AS5262 datasheet - electrical characteristics www.ams.com revision 1.1 8 - 36 7.4 timing characteristics 7.5 power management - supply monitor table 6. timing conditions symbol parameter conditions min typ max units t detwd wachdog error detection time 12 ms table 7. power management - supply monitor conditions symbol parameter conditions min typ max units vdd uvth vdd undervoltage upper threshold 3.5 4.0 4.5 v vdd uvtl vdd undervoltage lower threshold 3.0 3.5 4.0 v vdd uvhys vdd undervoltage hysteresis 300 500 900 mv vdd uvdet vdd undervoltage detection time 10 50 250 s vdd uvrec vdd undervoltage recovery time 10 50 250 s vdd ovth vdd overvoltage upper threshold 6.0 6.5 7.0 v vdd ovtl vdd overvoltage lower threshold 5.5 6 6.5 v vdd ovhys vdd overvoltage hysteresis 300 500 900 mv ana tovdet vdd overvoltage detection time (analog path) 10 50 250 s ana tovrec vdd overvoltage recovery time (analog path) 10 50 250 s
AS5262 datasheet - detailed description www.ams.com revision 1.1 9 - 36 8 detailed description the AS5262 is manufactured in a cmos process and uses a spinning current hall technology for sensing the magnetic field distrib ution across the surface of the chip. this ic consists of two galvanic isolated dies. all following in and register names refers to one die. the integrated hall elements are placed around the center of the device and deliver a voltage representation of the magnetic fi eld at the surface of the ic. through sigma-delta analog / digital conversion and digital signal-processing (dsp) algorithms, the AS5262 provides accurate hi gh-resolution absolute angular position information. for this purpose a coor dinate rotation digital computer (cordic) calculates the angle an d the magnitude of the hall array signals. the dsp is also used to provide digital information at the outputs that indicate movements of the used magnet towards or away f rom the device?s surface. a small low cost diametrically magnetized (two-pole) standard magnet provides the angular position information. the AS5262 senses the orientation of the magnetic field and calculates a 14-bit binary code. this code is mapped to a programma ble output characteristic in analog voltage format. this signal is available at the pin ( out ). the application angular region can be programmed in a user friendly way. the start angle position t1 and the end point t2 can be set and programmed according the mechanical range of the application with a resolution of 14 bits. in addition the t1y and t2y parameter can be set and programmed according the application. the transition point 0 to 360 degree can be shifted using the break point parameter bp . the voltage for clamping level low cll and clamping level high clh can be programmed with a resolution of 9 bits. both levels are individually adjustable. two additional linearization points can be used to improve the system linearity. these points c1 and c2 are programmable. the output parameters can be programmed in an otp register. no additional voltage is required to program the AS5262. the settin g may be overwritten at any time and will be reset to default when power is cycled. to make the setting permanent, the otp register must be programmed by using a lock bit the content could be frozen for ever. the AS5262 is tolerant to magnet misalignment and unwanted external magnetic fields due to differential measurement technique a nd hall sensor conditioning circuitry. 8.1 operation 8.1.1 vdd voltage monitor vdd over voltage management. if the supply voltage at pin vdd exceeds the over-voltage upper threshold for longer than the detection time the output is turned off. when the over voltage event has passed and the voltage applied to pin vdd falls below the over-voltage lower threshold for longer than the recovery time the device enters the normal mode and the output is enabled. vdd under voltage management. when the voltage applied to the vdd pin falls below the under-voltage lower threshold for longer than the detection time the output is turned off. when the voltage applied to the vdd pin exceeds the under-voltage upper threshold for longer than the detection time the device enters the normal mode and the output is enabled. 8.2 analog output by default (after programmed cust_lock otp bit) the analog output mode is selected. the pin out provides an analog voltage that is proportional to the angle of the rotating magnet and ratiometric to the supply voltage vdd . it can source or sink currents up in normal operation. a short circuit protection is in place and will switch the output driver in high z in case of an overload event. due to an inte lligent approach a permanent short circuit will not damage the device. this is also feasible in a high voltage condition up to 20 v and at the hig hest specified ambient temperature. after the digital signal processing (dsp) a 12-bit digital-to-analog converter and output stage provides the output signal. the dsp maps the application range to the output characteristic. an inversion of the slope is also programmable to allow invers ion of the rotation direction. the reference voltage for the digital-to-analog converter (dac) is taken from vdd . in this mode, the output voltage is ratiometric to the supply voltage. an on-chip diagnostic feature handles the error state at the output. depending on the failure the output is in hiz condition or is driven in the failure band. (see table 9) .
AS5262 datasheet - detailed description www.ams.com revision 1.1 10 - 36 8.2.1 programming parameters the analog output characteristic is programmable by otp. depending on the application, the analog output can be adjusted. the u ser can program the following application specific parameters: these parameters are input parameters. using the available prog ramming software and programmer these parameters are converted a nd finally written into the AS5262 128 bit otp memory. 8.2.2 application specific angular range programming the application range can be selected by programming t1 with a related t1y and t2 with a related t2y into the AS5262. the clamping levels cll and clh can be programmed independent from the t1 and t2 position and both levels can be separately adjusted. figure 5. programming of an individual application range figure 5 shows a simple example of the selection of the range. the mechanical starting point t1 and the mechanical end point t2 are defining the mechanical range. a sub range of the internal cordic output range is used and mapped to the needed output characteristic. t he analog output signal has 12 bit, hence the level t1y and t2y can be adjusted with this resolution. as a result of this level and the calculated slope the clamping region low is defined. the break point bp defines the transition between cll and clh . in this example the bp is set to 0 degree. the bp is also the end point of the clamping level high clh . this range is defined by the level clh and the calculated slope. both clamping levels can be set independently form each other. t1 mechanical angle start point t2 mechanical angle end point t1y voltage level at the t1 position t2y voltage level at the t2 position cll clamping level low clh clamping level high bp break point (transition point 0 to 360o) c1 calibration point 1 c2 calibration point 2 c1y trim value for c1 c2y trim value for c2 t1 t2 cll clh bp t1 t2 100%vdd 0 application range t1y t2y cll clh mechanical range electrical range clamping range low clamping range high 270 degree 0 degree 180 degree 90 degree
AS5262 datasheet - detailed description www.ams.com revision 1.1 11 - 36 8.2.3 application specific pr ogramming of the break point the break point bp can be programmed as well with 14 bits. this is important when the default transition point is inside the application range. i n such a case the default transition point must be shifted out of the application range. the parameter bp defines the new position. figure 6. individual programming of the break point bp 8.2.4 full scale mode figure 7. full scale mode for simplification, figure 7 describes a linear output voltage from rail to rail (0v to vdd) over the complete rotation range. in practice, this is not feasible due to saturation effects of the output stage transistors. the actual curve will be rounded towards the supply rails ( as indicated figure 7 ). analog output voltage 0 100 % vdd 360
AS5262 datasheet - detailed description www.ams.com revision 1.1 12 - 36 8.2.5 multiple slope output the AS5262 can be programmed to multiple slopes. where one programmed reference slope characteristic is copied to multiple slop es. two, three and four slopes are selectable by the user otp bits quaden (1:0). in addition to the steepness of the slope the clamping levels can be programmed as well. figure 8. two slope mode figure 9. four slope mode analogue output voltage 0 100 % vdd 360 analogue output voltage 0 100 % vdd 360
AS5262 datasheet - detailed description www.ams.com revision 1.1 13 - 36 8.2.6 linearization of the output to improve the system linearity an additional 2 point linearization function is implemented in the AS5262. figure 10. linearization of the output characteristic 8.2.7 resolution of parameters the programming parameters have a wide resolution of up to 14 bits. table 8. resolution of the programming parameters symbol parameter resolution note t1 mechanical angle start point 14 bits t2 mechanical angle stop point 14 bits t1y mechanical start voltage level 12 bits t2y mechanical stop voltage level 12 bits cll clamping level low 9 bits clh clamping level high 9 bits bp break point 14 bits c1 calibration point 1 4 bits c2 calibration point 2 4 bits c1y trim value c1 3 bits c2y trim value c2 3 bits t1 t2 100%vdd 0 t1y t2y cll clh c1 c2 c1y c2y
AS5262 datasheet - detailed description www.ams.com revision 1.1 14 - 36 figure 11. overview of the angular output voltage figure 11 gives an overview of the different ranges. the failure bands are used to indicate a wrong operation of the AS5262. this can be caused due to a broken supply line. by using the specified load resistors, the output level will remain in these bands during a fail. it is recommended to set the clamping level cll above the lower failure band and the clamping level clh below the higher failure band. clamping region low failure band low 0 4 cll clh 96 100 output voltage in percent of vdd failure band high application region clamping region high t2y t1y
AS5262 datasheet - detailed description www.ams.com revision 1.1 15 - 36 8.2.8 analog output diagnostic mode due to the low pin count in the application a wrong operation must be indicated by the output pin out . this could be realized using the failure bands. the failure band is defined with a fixed level. the failure band low is specified from 0 to 4% of the supply range over the total operation range. the failure band high is defined always from 96 to 100%. several failures can happen during operation. the output signal remains in these bands over the specified operating and load conditions. all different failures can be grouped into the internal alarms (f ailures) and the application related failures. c load 33 nf, r pu = 4k?10k r pd = 4k?10k load pull-up for efficient use of diagnostics, it is recommended to program to clamping levels cll and clh . 8.2.9 analog output driver parameters the output stage is configured in a push-pull output. therefore it is possible to sink and source currents. c load 33 nf, r pu = 4k?10k ; r pd = 4k?10k load pull-up notes: 1. this parameter will be finally defined after temperature characterisation. 2. design target for this value is reduced. table 9. different failure cases of AS5262 type failure mode symbol failure band note internal alarms (failures) out of magnetic range (too less or too high magnetic input) magrng high/low programmable by otp bit diag_high cordic overflow cof high/low programmable by otp bit diag_high offset compensation finished ocf high/low programmable by otp bit diag_high watchdog fail wdf high/low programmable by otp bit diag_high oscillator fail of high/low programmable by otp bit diag_high application related failures overvoltage condition ov high/low dependant on the load resistor pull up failure band high pull down failure band low broken vdd bvdd broken vss bvss short circuit output sco high/low switch off short circuit dependent table 10. general parameters for the output driver symbol parameter min typ max unit note ioutscl short circuit output current (low side driver) 5 10 20 ma v out =20v ioutsch short circuit output current (high side driver) -20 -10 -5 ma v out =0v tscdet short circuit detection time 20 600 s output stage turned off tscrec short circuit recovery time 2 20 ms output stage turned on ileakout output leakage current -20 20 a v out =vdd=5v bgndpu output voltage broken gnd with pull-up 96 100 %vdd bgndpd output voltage broken gnd with pull-down 0 4 %vdd bvddpu output voltage broken vdd with pull-up 96 100 %vdd bvddpd output voltage broken vdd with pull-down 0 4 %vdd outratio output ratiometric error -0.5 0.5 %vdd outdnl output dnl 10 (1) lsb between 4% and 96% of vdd outinl output inl -10 (2) 10 (2) lsb between 4% and 96% of vdd
AS5262 datasheet - application information www.ams.com revision 1.1 16 - 36 8.2.10 noise suppressor the noise suppressor is inserted after the angle calculation (first stage) and after range expansion (second stage). this funct ion is capable to reduce the noise level down to 1 lsb peak to peak over different programing ranges. 4 possible configurations of the noise suppressor can be selected via the otp bits filtercfg<1:0> . 8.2.11 hysteresis function AS5262 device includes a hysteresis function to avoid sudden jumps from clh to cll and vice versa caused by noise in the full t urn configuration. the hysteresis amplitude can be selected via the otp bits hystsel<1:0> . 9 application information 9.1 recommended application schematic figure 12 shows the recommended schematic in the application. all components marked with (*) are optional and can be used to further increase the emc. figure 12. AS5262 6-wire connection with pull-down / pull-up resistors c 1_x electric control unit c 2_x c 3_x c 4_x * r 1_x * r 2_x * r lpd_t c l_t tp1_t tp1_b 16 13 14 15 5 8 7 6 1 4 3 2 12 9 10 11 s_b s_t tp3_b tp3_t gnd_t gnd_b tp2_t tp2_b vdd_b out_t out_b AS5262 vdd_t vdd3v3_t vdd3v3_b r lpd_b c l_b sensor pcb vdd1 vdd2 gnd1 gnd2 out2 out1 c 1_x electric control unit c 2_x c 3_x c 4_x * r 1_x * r 2_x * r lpu_t c l_t tp1_t tp1_b 16 13 14 15 5 8 7 6 1 4 3 2 12 9 10 11 s_b s_t tp3_b tp3_t gnd_t gnd_b tp2_t tp2_b vdd_b out_t out_b AS5262 vdd_t vdd3v3_t vdd3v3_b r lpu_b c l_b sensor pcb vdd1 vdd2 gnd1 gnd2 out2 out1
AS5262 datasheet - application information www.ams.com revision 1.1 17 - 36 table 11. external components symbol parameter min typ max unit note c 1 vdd buffer capacitor 0.8 1 1.2 f low esr 0.3 c 2 vdd3v3 regulator capacitor 0.8 1 1.2 f low esr 0.3 c 3 out load capacitor (sensor pcb) 0 4.7 nf c 4 * vdd capacitor (optional) 4.7 nf do not increase due to programming over output. r 1 * vdd serial resistor (optional) 10 c l out load capacitor (ecu) 0 33 nf r 2 * out serial resistor (optional) 50 r lpu out pull-up resistance 4 10 k r lpd out pull-down resistance 4 10 k
AS5262 datasheet - application information www.ams.com revision 1.1 18 - 36 9.2 programming the AS5262 the AS5262 programming is a one-time-programming (otp) method, based on polysilicon fuses. the advantage of this method is that no additional programming voltage is needed. the internal ldo provides the current for programming. the otp consists of 128 bits; several bits are available for user programming. in addition factory settings are stored in the o tp memory. both regions are independently lockable by build in lock bits. a single otp cell can be programmed only once. per default, the cell is ?0?; a programmed cell will contain a ?1?. while it is not possible to reset a programmed bit from ?1? to ?0?, multiple otp writes are possi ble, as long as only unprogrammed ?0?-bits are programmed to ?1? . independent of the otp programming, it is possible to overwrite t he otp register temporarily with an otp write command. this is possible only if the user lock bit is not programmed. due to the programming over the output pin the device will initially start in the communication mode. in this mode the digital angle value can be read with a specific protocol format. it is a bidirectional communication possible. parameters can be written into the device. a programming of the device is triggered by a specific command. with another command (pass2func) the device can be switched into operation mode. in case of a programmed user lock bit the AS5262 automatically starts up in the functional operation mode. no communication of the specific protocol is possible after this. a standard half duplex uart protocol is used to exchange data with the device in the communication mode. 9.2.1 uart interface for programming the AS5262 uses a standard uart interface with an address byte and two data bytes. the read or write mode is selected with bit r/wn in the first byte. the timing (baudrate) is selected by the AS5262 over a synchronization frame. the baud rate register can be read an d overwritten (optional). every start bit is used for synchronisation. a time out function detects not complete commands and resets the AS5262 uart after the timeout period. 9.2.2 frame organization each frame is composed by 24 bits. the first byte of the frame specifies the read/write operation with the register address. 16 data bits contains the communication data. there will be no operation in case of the usage of a not specified cmd. the uart programming interface block of the AS5262 can operate in slave communication or master communication mode. in the slave communication mode the AS5262 receives the data. the programming tool is the driver of the single communication line. in case of the master communication mode the AS5262 transm its data in the frame format. the single communication line can be pulled down by the AS5262. the uart frame consists of 1 start bit (low level), 8 data bit, 1 even-parity bit and 1 stop bit (high level). data are transfe rred from lsb to msb figure 13. general uart frame table 12. bit timing symbol parameter min typ max unit note start start bit 1 tbit dx data bit 1 tbit par parity bit 1 tbit stop stop bit 1 tbit tsw slave/master switch time 7 tbit d0 d1 d2 d3 d4 d5 d6 d7 par start stop
AS5262 datasheet - application information www.ams.com revision 1.1 19 - 36 each communication starts with the reception of a request from the external controller. the request consists of two frames: one synchronization frame and the command frame. the synchronization frame contains the data 0x55 and allows the uart to measure the external controller baud rate: figure 14. synchronization frame the second frame contains the command read / write (1 bit) and the address (7 bits): figure 15. address and command frame only two commands are possible. in case of read command the idle phase between the command and the answer is the time tsw. in c ase of parity error command is not executed. notes: 1. in case of write command the request is followed by the frames containing the data to write. 2. in case of read command the communication direction will change and the AS5262 will answer with the frames containing the requested data. table 13. possible commands possible interface commands description as5x63 communication mode command cmd write write data to the otp memory or registers slave 0 read read data to the otp memory or registers slave & master 1 start stop d0 d1 d2 d3 d4 d5 d6 d7 par ad 3 ad 4 ad 5 ad 6 r/wn par start stop ad 0 ad 1 ad 2
AS5262 datasheet - application information www.ams.com revision 1.1 20 - 36 9.2.3 write (command description) figure 16. full write command ?? writing the AS5262 key in the fuse register (address 0x41) trigger s the transfer of the data from the otp ram into the poly fus e cell. ?? writing the AS5262 key in the pass2func register ( address 0x60) forces the device into normal mode. ad0 ad1 ad2 ad3 ad4 par start stop ad5 ad6 r/ wn write command frame par start stop d00 d01 d02 d03 d05 d06 d07 data1 frame (data to write on address ad<6:0>+1) d04 par start stop d00 d01 d02 d03 d05 d06 d07 data0 frame (data to write on address ad<6:0>) d04 start stop d0 d1 d2 d3 d4 d5 d6 d7 par synchronization frame
AS5262 datasheet - application information www.ams.com revision 1.1 21 - 36 9.2.4 read (command description) figure 17. full read command 9.2.5 baud-rate automatic detection the uart includes a built-in baud-rate monitor that uses the synchronization frame to detect the external controller baud-rate. this baud-rate is used after the synchronization byte to decode the following fram e and to transmit the answer and it is stored in the baudreg re gister. 9.2.6 baud-rate manual setting (optional) the baudreg register can be read and over-written for a possible manual setting of the baud-rate: in case the register is overw ritten with a value different from 0, this value will be used for the follow ing uart communications and the synchronization frame must be rem oved from the request. start stop d0 d1 d2 d3 d4 d5 d6 d7 par synchronization frame: ad0 ad1 ad2 ad3 ad4 par start stop ad5 ad6 r/wn read command frame: par start stop d00 d01 d02 d03 d05 d06 d07 data0 frame (data read from address ad<6:0>) (master): d04 par start stop d00 d01 d02 d03 d05 d06 d07 data1 frame (data read from address ad<6:0>+1) (master): d04
AS5262 datasheet - application information www.ams.com revision 1.1 22 - 36 figure 18. manual baud-rate setting figure 19. simple read and write 0 0 msb lsb wr baudreg address p start r/n stop s 0 0 1 1 0 1 0 1 msb lsb high byte p start stop s 0 0 0 0 0 0 0 0 msb lsb low byte start stop s p AS5262 in receiving mode (write access) even parity 0 even parity even parity 0 1 0 1 0 1 0 1 0 msb lsb idle synch frame p start r/n stop s even parity idle idle idle idle 1 msb lsb idle reg. address p start r/wn stop s msb lsb high byte p start stop s msb lsb low byte start stop idle s p AS5262 in receiving mode AS5262 in transmitting mode (read access) even parity even parity even parity idle idle 0 msb lsb idle reg. address p start r/n stop s msb lsb high byte p start stop s msb lsb low byte start stop idle s p AS5262 in receiving mode AS5262 in receiving mode (write access) even parity even parity even parity idle idle
AS5262 datasheet - application information www.ams.com revision 1.1 23 - 36 9.3 otp programming data table 14. otp memory map data byte bit number symbol default description data15 (0x0f) 0 factory settings 0 ams (reserved) factory settings 10 20 30 40 50 60 70 data14 (0x0e) 00 10 20 30 40 50 60 70 data13 (0x0d) 00 10 2 custid<0> 0 customer identifier customer settings 3 custid<1> 0 4 custid<2> 0 5 custid<3> 0 6 custid<4> 0 7 custid<5> 0 data12 (0x0c) 0 custid<6> 0 1x2lin<0>0 second linearization point (x-axis) 2x2lin<1>0 3x2lin<2>0 4x2lin<3>0 5x1lin<0>0 first linearization point (x-axis) 6x1lin<1>0 7x1lin<2>0 data11 (0x0b) 0x1lin<3>0 1 y1lin<0> 0 first linearization point (y-axis)
AS5262 datasheet - application information www.ams.com revision 1.1 24 - 36 2y1lin<1>0 first linearization point (y-axis) customer settings 3y1lin<2>0 4y2lin<0>0 second linearization point (y-axis) 5y2lin<1>0 6y2lin<2>0 7clh<0>0 clamping level high data10 (0x0a) 0clh<1>0 1clh<2>0 2clh<3>0 3clh<4>0 4clh<5>0 5clh<6>0 6clh<7>0 7clh<8>0 data9 (0x09) 0 cll<0> 0 clamping level low 1 cll<1> 0 2 cll<2> 0 3 cll<3> 0 4 cll<4> 0 5 cll<5> 0 6 cll<6> 0 7 cll<7> 0 data8 (0x08) 0 cll<8> 0 1 offset<0> 0 offset 2 offset<1> 0 3 offset<2> 0 4 offset<3> 0 5 offset<4> 0 6 offset<5> 0 7 offset<6> 0 data7 (0x07) 0 offset<7> 0 1 offset<8> 0 2 offset<9> 0 3 offset<10> 0 4 offset<11> 0 5 offset<12> 0 6 offset<13> 0 7 offset<14> 0 table 14. otp memory map data byte bit number symbol default description
AS5262 datasheet - application information www.ams.com revision 1.1 25 - 36 data6 (0x06) 0 offset<15> 0 offset customer settings 1 offset<16> 0 2 offset<17> 0 3 offset<18> 0 4 offset<19> 0 5gain<0>0 scale factor 6gain<1>0 7gain<2>0 data5 (0x05) 0gain<3>0 1gain<4>0 2gain<5>0 3gain<6>0 4gain<7>0 5gain<8>0 6gain<9>0 7 gain<10> 0 data4 (0x04) 0gain<11>0 1 gain<12> 0 2 gain<13> 0 3 gain<14> 0 4 gain<15> 0 5 gain<16> 0 6 bp<0> 0 break point 7 bp<1> 0 data3 (0x003) 0 bp<2> 0 1 bp<3> 0 2 bp<4> 0 3 bp<5> 0 4 bp<6> 0 5 bp<7> 0 6 bp<8> 0 7 bp<9> 0 data2 (0x02) 0 bp<10> 0 1 bp<11> 0 2 bp<12> 0 3 bp<13> 0 4 anglerng 0 sector selection 0=angular sector 22.5 degrees; 1=angular sector<22.5 degrees 5diag_high0 failure band selection 0=failure band low 1=failure band high table 14. otp memory map data byte bit number symbol default description
AS5262 datasheet - application information www.ams.com revision 1.1 26 - 36 data2 (0x02) 6 quaden<0> 0 quadrant mode enable 00=1quadrant;01=2quadrants; 10=3 quadrants;11=4 quadrants customer settings 7 quaden<1> 0 data1 (0x01) 0 airgapsel 0 magnetic input range extension 0:extended range;1=normal range 1 hystsel<0> 0 hysteresis selection 00=no hysteresis; 01: 56lsb; 10=91lsb; 11=137lsb 2 hystsel<1> 0 3 filtercfg<0> 0 filter configuration 00=no filter; 01= fast; 10=moderate; 11=slow 4 filtercfg<1> 0 5 not used 0 6 not used 0 7 not used 0 data0 (0x00) 0red_add<0>0 redundancy address identify the address of the byte containing the bit to be changed 1red_add<1>0 2red_add<2>0 3red_add<3>0 4red_bit<0>0 redundancy bit identify the position of the bit to be changed in the byte at the address red_add<3:0> 5red_bit<1>0 6red_bit<2>0 7 cust_lock 0 lock bit for customer area table 14. otp memory map data byte bit number symbol default description
AS5262 datasheet - application information www.ams.com revision 1.1 27 - 36 9.4 read / write register map table 15. read / write registers data byte bit number symbol default description data0 (0x20) 0 baudreg<0> 0 uart baud rate register read/write area 1 baudreg<1> 0 2 baudreg<2> 0 3 baudreg<3> 0 4 baudreg<4> 0 5 baudreg<5> 0 6 baudreg<6> 0 7 baudreg<7> 0 data1 (0x21) 0 baudreg<8> 0 1 not used 0 a read command returns all data bits at 0 2 not used 0 3 not used 0 4 not used 0 5 not used 0 6 not used 0 7 not used 0 data2 (0x22) 0 dac12in<8> 0 dac12 buffer value 1 dac12in<9> 0 2 dac12in<10> 0 3 dac12in<11> 0 4 dac12insel 0 dac12 buffer selection 5 r1k10k<0> 0 selection of the reference resistance used for otp download 6 r1k10k<1> 0 7 dsprn 0 resetn of the digital signal processing circuit data3 (0x23) 0 dac12in<0> 0 dac12 buffer value 1 dac12in<1> 0 2 dac12in<2> 0 3 dac12in<3> 0 4 dac12in<4> 0 5 dac12in<5> 0 6 dac12in<6> 0 7 dac12in<7> 0
AS5262 datasheet - application information www.ams.com revision 1.1 28 - 36 9.5 read only register map table 16. read only registers data byte bit number symbol default description data0 (0x28) 0 not used 0 a read command returns 0 read area 1 offsetfinished 0 offset compensation finished 2 agcfinished 0 agc loop compensation finished 3 cordicovf 0 overflow of the cordic 4 agcalarml 0 agc loop saturation because of b field too strong 5 agcalarmh 0 agc loop saturation because of b field too weak 6otp_res0 0=1k resistance selected for otp download; 1=10k resistance selected for otp download 7 parity_err 0 uart parity error flag data1 (0x29) 0 cordicout<0> 0 cordic output 1 cordicout<1> 0 2 cordicout<2> 0 3 cordicout<3> 0 4 cordicout<4> 0 5 cordicout<5> 0 6 cordicout<6> 0 7 cordicout<7> 0 data2 (0x2a) 0 cordicout<8> 0 1 cordicout<9> 0 2 cordicout<10> 0 3 cordicout<11> 0 4 cordicout<12> 0 5 cordicout<13> 0 6 not used 0 a read command returns all data bits at 0 7 not used 0 data3 (0x2b) 0dspout<0>0 dsp output 1dspout<1>0 2dspout<2>0 3dspout<3>0 4dspout<4>0 5dspout<5>0 6dspout<6>0 7dspout<7>0
AS5262 datasheet - application information www.ams.com revision 1.1 29 - 36 data4 (0x2c) 0dspout<8>0 dsp output read area 1dspout<9>0 2 dspout<10> 0 3 dspout<11> 0 4 not used 0 a read command returns all data bits at 0 5 not used 0 6 not used 0 7 not used 0 data5 (0x2d) 0 agcvalue<0> 0 agc value 1 agcvalue<1> 0 2 agcvalue<2> 0 3 agcvalue<3> 0 4 agcvalue<4> 0 5 agcvalue<5> 0 6 agcvalue<6> 0 7 agcvalue<7> 0 data6 (0x2e) 0mag<0>0 magnitude of magnetic field 1mag<1>0 2mag<2>0 3mag<3>0 4mag<4>0 5mag<5>0 6mag<6>0 7mag<7>0 data7 (0x2f) 0 not used 0 a read command returns all data bits at 0 1 not used 0 2 not used 0 3 not used 0 4 not used 0 5 not used 0 6 not used 0 7 not used 0 table 16. read only registers data byte bit number symbol default description
AS5262 datasheet - application information www.ams.com revision 1.1 30 - 36 9.6 special registers table 17. special registers data byte bit number symbol default description data0 (0x41) 0 AS5262key<0> 0 AS5262 key<15:0>=0101 0001 0110 0010 a write command with data different from AS5262 key is not executed a read command returns all data bits at 0 fuse register 1 AS5262key<1> 0 2 AS5262key<2> 0 3 AS5262key<3> 0 4 AS5262key<4> 0 5 AS5262key<5> 0 6 AS5262key<6> 0 7 AS5262key<7> 0 data1 (0x42) 0 AS5262key<8> 0 1 AS5262key<9> 0 2 AS5262key<10> 0 3 AS5262key<11> 0 4 AS5262key<12> 0 5 AS5262key<13> 0 6 AS5262key<14> 0 7 AS5262key<15> 0 data0 (0x60) 0 AS5262key<0> 0 AS5262 key<15:0>=0101 0001 0110 0010 a write command with data different from AS5262 key is not executed a read command returns all data bits at 0 pass2func register 1 AS5262key<1> 0 2 AS5262key<2> 0 3 AS5262key<3> 0 4 AS5262key<4> 0 5 AS5262key<5> 0 6 AS5262key<6> 0 7 AS5262key<7> 0 data1 (0x61) 0 AS5262key<8> 0 1 AS5262key<9> 0 2 AS5262key<10> 0 3 AS5262key<11> 0 4 AS5262key<12> 0 5 AS5262key<13> 0 6 AS5262key<14> 0 7 AS5262key<15> 0
AS5262 datasheet - application information www.ams.com revision 1.1 31 - 36 9.7 programming procedure ?? pull-up on out pin ?? vdd=5v ?? wait 10ms (after the startup time device enters communication mode) ?? write command: trimming bits are written in the otp ram ?? read command: all the trimming bits are read back to check the correctness of the writing procedure. ?? write AS5262key in the fuse register: the otp ram content is permanently transferred in to the poly fuse cells. ?? wait 10 ms (fuse time) ?? write command, r1k_10k<1:0>=(11)b: poly fuse cells are downloaded into the ram memory using a 10k resistance as reference. ?? wait 5 ms (download time) ?? read r1k_10k register, the expected value is 00b ?? write command, r1k_10k<1:0>=(11)b ?? read r1k_10k register, the expected value is (11)b. nb: step11 and step12 have to be consecutive. ?? read command: all the fused bits downloaded with 10k resistance are read back. ?? write command, r1k_10k=<1:0>=(10)b: poly fuse cells are downloaded into the ram memory using a 1k resistance as reference. ?? wait 5 ms (download time) ?? read r1k_10k register, the expected value is (00)b ?? write command register, r1k_10k<1:0>=(10)b ?? read r1k_10k register, the expected value is (10)b nb: step18 and step19 have to be consecutive. ?? read command: all the fused bits downloaded with 1k resistance are read back. ?? check that read commands at steps 5, 13 and 19 are matching ?? write AS5262key in the pass2func regi ster: device enters normal mode.
AS5262 datasheet - package drawings and markings www.ams.com revision 1.1 32 - 36 10 package drawin gs and markings the device is available in a mlf-16 package . figure 20. package drawings and dimensions marking: yywwvzz. yy ww v zz year week assembly plant identifier assembly traceability code symbol min nom max a 0.80 0.90 1.00 a1 0 0.02 0.05 a2 - 0.65 1.00 a3 0.20 ref l 0.50 0.60 0.70 l1 0.05 0.15 0.25 l2 0.05 0.10 0.15 0o - 14o b 0.35 0.40 0.45 b1 0.20 0.25 0.30 d 6.00 bsc e 6.00 bsc e 1.00 bsc d1 5.75 bsc e1 5.75 bsc d 2 4.10 4.20 4.30 e2 4.10 4.20 4.30 aaa - 0.15 - bbb - 0.10 - ccc - 0.10 - ddd - 0.05 - eee - 0.08 - fff - 0.10 - n16 notes: 1. dimensions and tolerancing confirm to asme y14.5m-1994 . 2. all dimensions are in miilimeters. angles are in degrees. 3. bilaretal coplanarity zone applies to the exposed pad as well as the terminal. 4. radius on the terminal is optional. 5. n is the total number of terminals.
AS5262 datasheet - package drawings and markings www.ams.com revision 1.1 33 - 36 figure 21. vertical cross section of mlf-16 notes: 1. all dimensions in mm. 2. die thickness 0.150mm nom. 3. adhesive thickness 0.011mm. 4. spacer thickness 0.203mm typ.
AS5262 datasheet - revision history www.ams.com revision 1.1 34 - 36 revision history note: typos may not be explicitly mentioned under revision history. revision date owner description 1.0 oct 30, 2012 mub initial revision 1.1 oct 31, 2012 updated figure 3 , table 1 , table 2 , table 10 and figure 12
AS5262 datasheet - ordering information www.ams.com revision 1.1 35 - 36 11 ordering information the devices are available as the standard products shown in table 18 . note: all products are rohs compliant and ams green. buy our products or get free samples online at www.ams.com/icdirect technical support is available at www.ams.com/technical-support for further information and requests, email us at sales@ams.com (or) find your local distributor at www.ams.com/distributor table 18. ordering information ordering code description delivery form package AS5262-hmfp 12-bit programmable redundant angle position sensor with analog outputs tape&reel mlf 16 6x6
AS5262 datasheet - copyrights www.ams.com revision 1.1 36 - 36 copyrights copyright ? 1997-2012, ams ag, tobelbaderstrasse 30, 8141 unterpremstaetten, austria-europe. trademarks registered ?. all right s reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written con sent of the copyright owner. all products and companies mentioned are trademarks or registered trademarks of their respective companies. disclaimer devices sold by ams ag are covered by the warranty and patent indemnification provisions appearing in its term of sale. ams ag makes no warranty, express, statutory, implied, or by description rega rding the information set forth herein or regarding the freedom of the described devices from patent infringement. ams ag 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 ams ag for current information. this product is intended for use in normal commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliabi lity applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without addi tional processing by ams ag for each application. for shipments of less than 100 parts the manufacturing flow might show deviations from the stan dard production flow, such as test flow or test location. the information furnished here by ams ag is believed to be correct and accurate. however, ams ag shall not be liable to recipien t or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruptio n of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, perfo rmance or use of the technical data herein. no obligation or liability to recipient or any third party shall arise or flow out of ams ag rendering of technical or other services. contact information headquarters ams ag tobelbaderstrasse 30 a-8141 unterpremstaetten, austria tel : +43 (0) 3136 500 0 fax : +43 (0) 3136 525 01 for sales offices, distributors and representatives, please visit: http://www.ams.com/contact

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