View ATS625_952851.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ATS625 preliminary information subject to change without notice january 12, 2004 true zero speed, low jitter, high accuracy, gear tooth sensor pin 1: v cc pin 2: v out pin 3: gnd (recommended) or float pin 4: gnd the ATS625 true zero speed gear tooth sensor is an optimized hall ic/magnet configuration packaged in a molded module that provides a user-friendly solution for digital gear tooth sensing applications. the sensor assembly consists of an over-molded package, which holds together a samarium cobalt magnet, a pole piece and a true zero-speed hall ic that has been optimized to the magnetic circuit. this small package can be easily assembled and used in conjunction with gears of various shapes and sizes. the sensor incorporates a dual element hall ic that switches in response to differential magnetic signals created by a ferrous target. digital processing of the analog signal provides zero speed performance independent of air gap and also dynamic adaptation of device performance to the typica l operating conditions found in automotive applications (reduced vibration sensitivity). high- resolution peak detecting dacs are used to set the adaptive switching thresholds of the device. hysteresis in the thresholds reduces the negative effects of any anomalies in the magnetic signal associated with the tar gets used in many automotive applications. this sensor system is optimized for crank applications that utilize targets that possess signature regions. when ordering, please use the complete part number: ATS625lsg. absolute maximum ratings supply voltage 1 , v cc . . . . . . . . . . . . . . . . . . . . . . . . . . 26.5 v reverse supply voltage, v r . . . . . . . . . . . . . . . . . . . . . . . . . . . . ?18 v reverse supply current, i r . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ma reverse output voltage, v orout . . . . . . . . . . . . . . . . . . . . . . . .. ?0.5 v continuous output current, i out . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ma operating temperature range, t op . . . . . . . . . . . . . . . . . . -40 c to 150 c storage temperature, t s . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 c package power rating, ? ja . . . . . . . . . . . . . . . . . . 126 c/w maximum junction temperature, t jmax . . . . . . . . . . . . . . . . . . . . . . . . . 165 c maximum junction temperature ? 100 hours, t jmax . . . . . . . . . . . . . . . . . . . . . . . . . 180 c features & benefits highly repeatable over temperature tight timing accuracy over temperature true zero speed operation air gap independent switch points large operating air gaps defined power up state wide operating voltage range digital output representing target profile single chip sensing ic for high reliability small mechanical size optimized hall ic magnetic system fast start-up agc and continuous update circuit under-voltage lockout improved resistance to transients coupled onto the output 1 refer to power de-rating curve engineering samples available on a limited basis. contact your local sales or applications support office for additional information.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 2 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 operating characteristics valid at t a = -40 o c to 150 o c (t j t jmax ) over air gap unless otherwise noted. typical operating parameters: v cc = 12 v and 25 c ambient temperature. characteristic symbol test condi tions min. typ. max. units electrical characteristics supply voltage v cc operating; tj < tjmax 4.0 24 v under voltage lockout uvlo < vcc min v reverse supply current i rcc v cc = -18 v -10 ma supply zener clamp voltage v z 26.5 32 38 v supply zener current i z tj < tj(max); continuous 100 ma output off 9 14 ma supply current i cc output on 9 14 ma power-on state characteristics power-on state s po high power up time t po gear speed < 100 rpm; vcc > vcc min 200 us output stage low output voltage v sat i sink = 20 ma, output = on 200 400 mv output current limit i lin v out = 12 v, tj < tj(max) 25 45 70 ma output leakage current i off output = off, v out = 24 v 10 a output rise time t r r l = 500 ? , c l = 10 pf 1.0 2 s output fall time t f r l = 500 ? , c l = 10 pf 0.6 2 s switch point characteristics minimum speed s min 0 rpm maximum speed s max reference target 12000 rpm bandwidth f-3db 20 khz operate point bop% % of peak-to-peak signal, ag < agmax; output high to low 60 % release point brp% % of peak-to-peak signal, ag < agmax; output low to high 40 % calibration initial calibration start-up 2 1 6 edges calibration update running mode operation continuous 2 power-up speed 200 rpm. refer to applications sect ion for description of start-up behavior.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 3 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic symbol test condi tions min. typ. max. units operating characteristics (with 60+0 reference target) operational air gap ag measured from sensor face to target 0.5 - 2.5 mm relative timing accuracy, sequential mechanical rising edge operational air gap, constant speed, relative to position at 1.5 mm - - 0.4 relative timing accuracy, sequential mechanical falling edge operational air gap, constant speed, relative to position at 1.5 mm - - 0.4 relative timing accuracy, signature mechanical rising edge operational air gap, constant speed, relative to position at 1.5 mm - - 0.4 relative timing accuracy, signature mechanical falling edge operational air gap, constant speed, relative to position at 1.5 mm - - 1.5 3 relative repeatability 4 , sequential rising and falling edges t e 360 repeatability, 1000 edges; peak- peak sinusoidal signal with 60 g minimum and 6 period - - 0.08 operating signal accuracy spec compliance (operational air gap) 60 - - g 3 accuracy on this edge is highly dependent upon specific target geometry; please consult with allegro microsystems to aid with assessment of specific target geometries. 4 repeatability specification based on statis tical evaluation of sample population. reference target/g ear information diameter 120 mm thickness 6 mm sequential tooth width 3 mm sequential valley width 3 mm sequential valley depth 3 mm signature tooth width 9 mm material low carbon steel
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 4 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 sensor description assembly description: the ATS625lsg true zero speed gear tooth sensor is a hall ic/magnet configuration that is fully optimized to provide digital detection of gear tooth edges. this sensor is integrally molded into a plastic body that has been optimized for size, ease of assembly, and manufacturability. high operating temperature materials are used in all aspects of construction. sensing technology: the gear tooth sensor contains a single-chip differential hall effect sensor ic, a 4-pin leadframe, a samarium cobalt magnet, and a flat ferrous pole piece. the hall ic consists of two hall elements spaced 2.2 mm apart that each measure the magnetic gradient created by t he passing of a ferrous object. the differential output of the two elements is converted to a digital signal that is processed to provide the digital output.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 5 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 operation: after proper power is applied to the component the sensor is then capable of providing digital information that is representative of the profile of a rotating gear. no additional optimization is needed and minimal processing circuitry is required. this ease of use should reduce design time and incremental assembly costs for most applications. the following output diagram is indicative of the sensor performance for t he polarity indicated in the figure at the bottom of the page. mechanical profile sensor electrical output profile magnetic profile sig tooth output polarity: the output of the sensor will switch from low to high as the leading edge of the tooth passes the sensor face in the direction indicated in the figure below. in this system confi guration, the output voltage will be high when the sensor is facin g a tooth. if rotation occurs in the opposite direction, the output polarity will invert. power-on state operation: the device is guaranteed to power up in the off state (logic high output). high over tooth
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 6 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 start-up detection: since the sensor powers up in the off state (logic high output ), the first edge seen by the sensor can be missed if the switching induced by that edge reinforces the off state. therefore, the first edge that can be guaranteed to induce an output transition is the second detected edge. this device has ac curate first electrical falling edge detection. the tables below show various start-up schemes. mechanical target profile sensor output (start-up over valley) magnetic profile (high over tooth) sensor output (start-up over tooth) sensor output (start-up over rising edge) sensor output (start-up over falling edge) sensor start-up location mechanical target profile sensor output (start-up over valley) magnetic profile (low over tooth) sensor output (start-up over tooth) sensor output (start-up over rising edge) sensor output (start-up over falling edge) sensor start-up location high over tooth low over tooth
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 7 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 under voltage lockout: when the supply voltage falls below the minimum operating voltage (vcc uv ), the device turns off and stays off irrespective of the state of the magn etic field. this prevents false signal s caused by under-voltage conditions from propagating to the output of the sensor. power supply protection: the device contains an on-chip regulator and can operate over a wide supply vo ltage range. for devices that need to operate from an unregulated power supply, transient protecti on must be added externally. for applications using a regulated line, emi/rfi protection may still be required. the fo llowing circuit is the most basic configuration required for proper device operation. contact allegro microsystems for the circuitry needed for compliance to various emc specifications. internal electronics: the ATS625lsg contains a self-calibrating hall effect ic t hat possesses two hall elements, a temperature compensated amplifier and offset cancellation circuitry. the ic also contai ns a voltage regulator that prov ides supply noise rejection over the operating voltage range. the hall trans ducers and the electronics are integrated on the same silicon substrate using a proprietary bicmos process. changes in temperature do not greatly affect this device due to the stable amplifier design and the offset rejection circuitry. thresh logic hall amp automatic gain control threshold comparator threshp threshn reference generator ppeak npeak vsig pdac n dac internal regulator vcc gnd output current limit output transistor
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 8 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 sensor operation: auto matic gain control (agc ) the patented self-calibrating circuitry is unique. after ea ch power up, the device measures the peak-to-peak magnetic signal. the gain of the sensor is then adjusted which keeps the internal signal amplitude constant over the air gap range of the device. this feature prov ides operational characterist ics independent of air gap. differential magnetic signal with increasing air gap -1000 -800 -600 -400 -200 0 200 400 600 800 1000 0123456789101112131415 target position [degrees] magnetic flux density [gauss] 0.25 mm 0.50 mm 1.00 mm 1.50 mm 2.00 mm magnetic signal with no amplification different ial elect rical signal wit h increasing air gap -1000 -800 -600 -400 -200 0 200 400 600 800 1000 0123456789101112131415 target position [degrees] differential signal [mv] 0.25 mm 0.50 mm 1.00 mm 1.50 mm 2.00 mm electrical signal after agc sensor operation: of fset compensation in addition to normalizing performance over air gap, the gain c ontrol circuitry also reduces the effect of chip, magnet, and installation offsets. this is accomplished using two d/a conv erters that capture the peak and valley of the signal and use it as a reference for the switching comparator. if induced offset s bias the absolute signal up or down, agc and the dynamic dac behavior work to normalize and reduce the impact of the offset on sensor performance.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 9 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 sensor operation: switch points switch points in the ATS625lsg are established dynamically as a percentage of the amplitud e of the normalized magnetic signal. two dacs track the peaks of the normalized magnetic signal (see the section on update); the switching thresholds are established at 40% and 60% of the tw o dac?s values. the proximity of the thresholds near 50% ensures the most accurate and consistent switching where the signal is steepest and least affected by air gap variation. the low hysteresis of 20% provides high air gap performance and immunity to false switching on noise, vibration, backlash and other transient events. the figure below graphically demonstrates the est ablishment of the switching threshold levels. switching threshold levels 0 % 100 % bop brp 60 % 40 % because the thresholds are established dynamically as a perc entage of the peak-peak signal, the effect of a baseline shift is minimized. as a result, the effects of offsets indu ced by tilted or off-center installation are minimized.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 10 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 sensor operation: update the ATS625lsg incorporates an algorithm that continuously monitors the system and updates the switching thresholds accordingly. the switch point for each edge is determined by the previous two edges. since variations are tracked in real time, the sensor has high immunity to target run-out and reta ins excellent accuracy and functionality in the presence of both run-out and transient me chanical events. the figures below show how the sensor uses historical data to provide the switching threshold for a given edge.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 11 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 switching level - operate operate point based on previous two p eaks switching lev el - release release point based on previous two peaks
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 12 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 sensor/target evaluation in order to establish the proper operating specification for a particular sensor /target system, a system atic evaluation of the magnetic circuit should be performed. the first step is the generation of a magnetic map of the target. by using a calibrated device, a magnetic signature of the system is made. the following is a map of the 60+2 reference target. -400 -350 -300 -250 -200 -150 -100 -50 0 50 100 150 200 250 300 0 30 60 90 120 150 180 position [] differential flux density [gauss] 0.75mm 1.00mm 1.50mm 2.00mm 2.50mm 3.00mm a single curve is distilled from this map data that describes the peak-peak magnetic field versus air gap. knowing the minimum amount of magnetic flux density that guarantees operation of the sensor, one can determine the maximum operational air gap of the sensor/target sys tem. referring to the chart below, a minimum required peak-peak signal of 60g corresponds to a maximum air gap of approximately 2.5 mm.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 13 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 ATS625lsg 60+2 target map 0 100 200 300 400 500 600 700 800 0.511.522.533.5 air gap (mm) peak-peak flux density (gauss)
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 14 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 target design for the generation of adequate magnetic field levels, the follo wing recommendations should be followed in the design and specification of targets. ? 2 mm < tooth width < 4 mm ? valley width > 2 mm ? valley depth > 2 mm ? gear thickness > 3 mm ? target material must be low carbon steel though these parameters apply to targets of traditional geometry (radially oriented teeth with radial sensing), they can be applied to stamped targets and axially sensed targets as well. for stamped geometries with axial sensing, the valley depth is intrinsically infinite so the criteria for tooth width, valley width, material thickness (can be < 3 mm) and material specification need only be considered. sensor evaluation: accuracy while the update algorithm will allow the sensor to adapt to sy stem changes (e.g. air gap increase), major changes in air gap can adversely affect switching performance. when characte rizing sensor performance over a significant air gap range, be sure to re-power the device at each air gap. this ensure s that self-calibration occurs for each installation condition. see the specifications on page 3 and the section entitl ed characteristic data for timing accuracy performance. sensor evaluation : repeatability repeatability measurement methodology has been formulated to minimize the effect of test system jitter on device measurements. by triggering the me asurement equipment (oscilloscope) clos e to the desired output edge, the speed variations that occur within a single revolution of the target are effectively nullified. because the trigger event occurs a v ery short time before the measured event, little opportunity is giv en for measurement system jitter to impact the time-based measurements. after the data is taken on the oscilloscope, statistical analysis of the distribution is made to quantify variability and capability. though complete repeatability results c an be found in the characterist ic data section of this document, the following figure shows the correlation between mag netic signal strength and repeatability. since an inverse relationship exists between magnetic signal strength and low repeatability, optimum rep eatability performance can be attained through minimizing the operating air gap and optimizing the target design.
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 15 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 repeatability measurement methodology mechanical target profile sensor electrical output low resolution encoder high resolution encoder oscilloscope trigger "n" events after low res pulse statistical distribution of 1000 sweeps high res encoder pulse closest to desired output edge x oscilloscope trace of 1000 sweeps for the same output edge sensor evaluation: emc characterization only test name reference specification esd ? human body model aec-q100-002 esd ? machine model aec-q100-003 conducted transients iso 7637-1 direct rf injection iso 11452-7 bulk current injection iso 11452-4 tem cell iso 11452-3 please contact allegro microsystems for emc performance
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 16 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 mechanical information component material description value element spacing hall sensing element spacing 2.2 mm back-biasing magnet rare earth south pole behind ic sensor package material thermoset epoxy maximum temperature 170c 1 leads copper solder, tin / lead 90/10 2 1 temperature excursions of up to 260c for 2 minutes or less are permitted (based on delamination studies). 2 industry accepted soldering techniques are acceptable for this package as long as the indicated maximum temperature is not exceeded. device qualification program test name test conditions test length # of lots sample / lot comments pre/post test ta = room, hot, cold high temperature operating life (htol) ta = 150c, tj 170c 408 hrs 1 77 jesd22-a108 high temperature bake (htb) ta = 170c 1000 hrs 1 77 jesd22-a103 pre conditioning (pc) 85c/85% rh 168 hrs 1 231 jesd22-a112 & a113 temperature humidity bias (thb) or hast 85c/85%rh 130c/85%rh 1000 hrs 50 hrs 1 77 jesd22-a101 jesd22-a110 autoclave (ac) 121c/15 psig 96 hrs 1 77 jesd22-a102 temperature cycle (tc) -65c to +150c or -50c to +150c 500 cycles 1000 cycles 1 77 jesd22-a104 external visual (ev) physical dimensions (pd) 1 30 lead integrity 1 45 bond pull strength 1 30 esd hbm & mm 1 3 per model per v step jesd22-a114 & a115,cdf- aec-q100-002, 003 & 011 solderability (sd) 1 15 jesd22-b102 early life failure rate (elfr) 125c or 150c 48 hrs 24 hrs 1 800 jesd22-a108 gate leakage (gl) 1 6 cdf- aec-q100-006 electrical distributions (ed) ta = room, hot, cold 3 30
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 17 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 power de-rating due to internal power consumption, the junction temperature of the ic, tj, is higher than the ambient environment temperature, ta. to ensure that the device does not operate above the maximum rated junction temperature use the following calculations: ? t = p d * r ja where: p d = vcc * icc ? t=vcc * icc * r ja where ? t denotes the temperature rise resulting from the ic?s power dissipation. tj = ta + ? t for the sensor : tj(max) = 165c r ja = 126c/w typical tj calculation: ta = 25 c vcc = 5 v icc = 9.0 ma p d = vcc * icc = 5 v * 9.0 ma = 45.0 mw ? t = p d * r ja = 45.0 mw * 126c/w = 5.7c tj = ta + ? t = 25 c + 5.7c = 30.7c maximum allowable power dissipation calculation for ATS625lsg: assume: ta = ta max = 150 c tj(max) = 165c icc = 8.0 ma 5 if: tj = ta + ? t 5 max icc @ 150c < max icc @ 25c, see characteristic data then, at ta = 150 c: ? t max = tj max ? ta max = 165c - 150c = 15c if: ? t = p d * r ja then, at ta = 150c: p dmax = ? t max / r ja = 15c / 126c/w = 119 mw if: p d = vcc * icc then the maximum vcc at 150c is therefore: vccmax = p dmax / icc = 119 mw / 9.0 ma = 13.2 v this value applies only to the voltage drop across the 625 chip. if a protective series diode or resistor is used, the effective maximum supply voltage is increased. for example, when a standard diode with a 0.7 v drop is used: vsmax = 13.2 v + 0.7 v = 13.9 v ATS625lsg package power de-rating curve thermal resistance = 126c/watt, t jmax = 165c 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 20 40 60 80 100 120 140 160 180 ambient temperature [c] maximum supply voltage [volts]
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 18 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: electrical iccon 0 2 4 6 8 10 12 14 16 0 102030 vcc [v] icc [ma] -40 0 25 85 150 iccoff 0 2 4 6 8 10 12 14 16 0 102030 vcc [v] icc [ma] -40 0 25 85 150 iccon 0 2 4 6 8 10 12 14 16 -50 0 50 100 150 temperature [c] icc [ma] 5 12 20 26.5 iccoff 0 2 4 6 8 10 12 14 16 -50 0 50 100 150 temperature [c] icc [ma] 5 12 20 26.5
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 19 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 output saturation voltage output leakage current 0 50 100 150 200 250 300 350 400 -50 0 50 100 150 temperature (c) vsat (mv) 0.00 0.15 0.30 0.45 0.60 0.75 0.90 1.05 1.20 leakage current (ua) vsat ioff
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 20 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: rela tive timing accuracy relative timing accuracy @ 100 rpm sequential rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1000 rpm sequential rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1500 rpm sequential rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 100 rpm sequential falling edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1000 rpm sequential falling edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1500 rpm sequential falling edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 21 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: re lative timing accuracy relative timing accuracy @ 100 rpm signature rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1000 rpm signature rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1500 rpm sequential rising edge -1 -0.5 0 0.5 1 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 100 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1000 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 0123 air gap [mm] edge position [] -40 0 25 85 150 relative timing accuracy @ 1500 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 0123 air gap [mm] edge position [] -40 0 25 85 150
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 22 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: re lative timing accuracy relative timing accuracy @ 100 rpm sequential rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1000 rpm sequential rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1500 rpm sequential rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 100 rpm sequential falling edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1000 rpm sequential falling edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1500 rpm sequential falling edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 23 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: re lative timing accuracy relative timing accuracy @ 100 rpm signature rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1000 rpm signature rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1500 rpm signature rising edge -1 -0.5 0 0.5 1 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 100 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1000 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75 relative timing accuracy @ 1500 rpm signature falling edge -1 -0.5 0 0.5 1 1.5 2 -50 0 50 100 150 temperature [c] edge position [] 0.4 0.5 0.8 1.5 2 2.35 2.5 2.65 2.75
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 24 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 characteristic data: repeatability 360 repeatability @ 1000 rpm allegro 60+2 standard target sequential falling edge 0.00 0.05 0.10 0.15 0.20 0.25 0.01.02.03.04.0 air gap [mm] repeatabilty [] 150c 25c -40c
a ATS625 true zero speed, low jitter, hi gh accuracy, gear tooth sensor preliminary rev 2.0; dsd; 05may03 page 25 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 1993, 1995 allegro microsystems, inc. preliminary information subject to change without notice; january 12, 2004 package drawing a 8.0 ? 2.90 1.7 4.7 24.65 0.1 5.50 0.71 0.38 dwg. mh-027-4 mm 1.5 1.5 0.5 4.4 ref 0.6 (4) 0.4 (4) +0.15 -0.05 15.3 5.80 see note 5.5 1.6 1.8 1.27 0.1 (3) 0.7 0.7 additional applications information on gear tooth and other allegro sensors can be obtained at allegro?s web site, www.allegromicro.com or from allegro?s cdrom ams-702.

▲Up To Search▲

Price & Availability of ATS625

	To Download ATS625 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .