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the a19530 is an optimized hall-effect integrated circuit (ic) that provides a user-friendly solution for direction detection and true zero-speed digital magnetic wheel or gear tooth sensing. the small package can be easily assembled and used in conjunction with a wide variety of magnetic wheels or back-biased with a magnet for gear tooth sensing applications. the ic employs patented algorithms for the special operational requirements of automotive transmission applications. the speed and direction of the target are communicated through a variable pulse-width output protocol. the a19530 high vibration immunity option prevents direction pulses from occurring under angular vibration without sacrificing maximum air gap capability, whereas the no vibration immunity option allows for continuous direction pulse emission under vibration. the advanced vibration detection algorithm will systematically calibrate the sensor ic on the initial teeth of true target rotation and not on vibration, always providing an accurate signal in running mode. more classic output options such as speed only protocol, representing target profile or fast direction change recognition with reduced vibration immunity also complete the programming panel of the a19530. advanced signal processing, innovative algorithms, short/ open detection capability, and asil b compliant design make the a19530 an ideal solution for a wide range of speed and direction sensing needs with diagnostic requirements. this device is available in a lead (pb) free 3-pin sip package with tin-plated leadframe. a19530-ds mco-0000493 ? integrated diagnostics and certified safety design process for asil b compliance ? three-wire output pulse-width protocol supporting speed, direction, and asil ? advanced algorithms supporting vibration detection and sudden air gap changes ? ring magnet and ferrous target sensing ? air gap independent switch points ? true zero-speed operation ? integrated emc capacitor in a single overmolded miniature package ? robust test coverage capability with scan path and iddq measurement high feature three-wire hall-effect transmission speed and direction sensor ic figure 1: functional block diagram a19530 features and benefits description september 13, 2018 2 - not to scale package: 3-pin sip (suffix uc) synchronous digital controller hall amp agc adc offset adjust regulator (analog) vcc gnd regulator (digital) hall amp agc adc offset adjust filter filter output control out
2 selection guide* part number packing a19530lucctn-fooooej-a tape and reel, 13-in. reel, 4000 pieces per reel a19530lucctn-fsibcej-a tape and reel, 13-in. reel, 4000 pieces per reel * not all combinations are available. contact allegro sales for availability and pricing of custom programming options a19530 l uc -n - smco nde 5 nales oenshort diagnostic caaility - no oenshort detection c no iration immnity or continos direction detection l lagged iration lag or immediate direction change recognition h high iration immnity with non-direction lses seed only ott withot iration immnity laned, no ott dring caliration p non irection plses dring caliration seed only ott n reerse 90 s, non-irection 10 s narrow reerse 135 s, non-irection 30 s intermediate m reerse 150 s, non-irection 30 s medim reerse 10 s, non-irection 30 s wide seed only ott s singl e, one lse er tooth-alley air al, one lse er each tooth and alley seed only ott orward lses emitted or in 1 to in 3 rotation r reerse lses emitted or in 1 to in 3 rotation pacing tye a conigration otions or e amle a19530 lucc n - rsnph -a here a conigration character is nseciied, will e sed. or eamle, -snpl alies to oth rotation irectio n conigration ariants. a -a asl rotocol enaled lan asl rotocol disaled high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
3 absolute maximum ratings characteristic symbol notes rating unit supply voltage v cc refer to power derating section 27 v reverse supply voltage v rcc C18 v reverse supply current i rcc 50 ma reverse output voltage v rout C0.5 v output sink current i out open/short detection disabled 25 ma operating ambient temperature t a C40 to 150 c maximum junction temperature t j(max) 165 c storage temperature t stg C65 to 170 c pinout diagram terminal list number name function 1 vcc supply voltage 2 gnd ground 3 out open drain output symbol characteristic rating unit c1 (c supply ) nominal capacitance 220 nf c2 (c out ) nominal capacitance 4.7 nf internal discrete component ratings v s v pu r pu 1 vcc 3 out 2 gnd c2 c1 a19530 senso r output r s *for emc enhancement 50 * r out * 50 figure 2 : typical application circuit 2 ejector pin mark on far side 3 c1 c2 1 note: for -xxxxxex- option (open/short detection enabled), pull-up resistor value as noted in operational characteristics table. high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
4 operating characteristics: valid through full operating and temperature ranges, unless otherwise noted characteristics symbol test conditions min. typ. [1] max. unit electrical characteristics supply voltage [2] v cc operating; t j < t j(max) , r supply = 0 4 C 24 v undervoltage lockout v cc(uv) v cc 0 5 v or 5 0 v, r supply = 0 C C 3.95 v reverse supply current i rcc v cc = v rcc(max) C10 C 0 ma supply zener clamp voltage v zsupply i cc = i cc(max) + 3 ma, t a = 25c, r supply = 0 27 C C v supply zener current i z t j < t j(max) , v cc = 27 v C C 13 ma supply current i cc C 8 10 ma output stage power-on state pos connected as in figure 2 high C low output voltage v diag-low 4.75 v < v pu < 5.25 v, output = low, 1.45 k r pu 3.4 k at sensor output in figure 2 -xxxxxex- variant, r out = 0 435 875 1115 mv -xxxxxex- variant, r out = 50 500 875 1250 mv low output voltage impedance z sat-low i sink = 10 ma, output transistor on, r out = 0 open/short disabled C C 50 high output voltage v diag-high 4.75 v < v pu < 5.25 v, output = high, 1.45 k r pu 3.4 k at sensor output in figure 2 -xxxxxex- variant, r out = 0 3735 4125 4475 mv -xxxxxex- variant, r out = 50 3750 4125 4500 mv output leakage current i off output transistor off, v out = 24 v open/short disabled C C 10 a output zener clamp voltage v zout i out = 3 ma, t a = 25c 27 C C v output current limit i lim v out = 12 v, t j < t j(max) 25 45 70 ma output rise time t r(out-diag-on) r pu = 1.5 k, v pu = 5 v, from 10% to 90%, r out = 0 -xxxxxex- variant C 15 C s r pu = 3.3 k, v pu = 5 v, from 10% to 90%, r out = 0 -xxxxxex- variant C 35 C s output fall time t f r pu = 1.5 k, v pu = 5 v, from 90% to 10%, r out = 0 -xxxxxex- variant 1.5 C 4.5 s open/short disabled 0.5 C 2.5 s r pu = 3.3 k, v pu = 5 v, from 90% to 10%, r out = 0 -xxxxxex- variant C 2.5 C s open/short disabled C 1.5 C s output pulse characteristics [3] pulse width, forward rotation t w(fwd) timing from start of falling output transition to start of rising output transition. measured pulse width depends on circuit configuration and thresholds. 38 45 52 s pulse width, reverse rotation t w(rev) -xxnxxxx- variant 76 90 104 s -xxixxxx- variant 114 135 156 s -xxmxxxx- variant 127 150 173 s pulse width, non-direction t w(nd) -xxwxxxx- variant 153 180 207 s -xxnpxxx- variant 153 180 207 s -xxipxxx- variant, -xxmpxxx- variant, -xxwpxxx- variant 306 360 414 s [1] typical values are at t a = 25c and v cc = 12 v. performance may vary for individual units, within the specified maximum and minimum limits. [2] maximum voltage must be adjusted for power dissipation and junction temperature; see power derating section. [3] only applicable to direction detection options, s (single) and d (dual). high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
5 operating characteristics (continued): valid through full operating and temperature ranges, unless otherwise noted characteristics symbol test conditions min. typ. [1] max. unit performance characteristics operate point b op % peak to peak C 69 C % release point b rp % peak to peak C 31 C % switch point separation b diff(sp-sep) minimum separation between channels as a percentage of signal amplitude at each switching point; refer to figure 5 20 C C % differential input signal frequency, forward rotation [4] f fwd -xsxxxxx- and -xoxxxxx- variant 0 C 12 khz -xdxxxxx- variant 0 C 6 khz differential input signal frequency, reverse rotation [4] f rev -xsnxxxx- variant 0 C 7 khz -xdnxxxx- variant 0 C 3.5 khz -xswxxxx- variant 0 C 4 khz -xdwxxxx- variant 0 C 2 khz differential input signal frequency, non-direction [4] f nd -xsxphxx- and -xsxplxx- variant 0 C 2.2 khz -xdxphxx- and -xdxplxx- variant 0 C 1.1 khz temperature coefficient sensitivity temperature coefficient (tc) t c -xxxxxxg- variant C 0.04 C %/c -xxxxxxj- variant C 0.13 C %/c power-on and calibration power-on time t po f op < 100 hz C C 2 ms first direction output pulse [6] amount of target rotation (constant direction) following power-on until first electrical output pulse of either t w(fwd) or t w(rev) ; refer to figure 3 -xxxxcxx- variant C 1.5 < 2.5 t cycle -xxxxlxx- variant, -xxxxhxx- variant; b diff(pk-pk) > 60 g, b diff(pk-pk) 1500 g C 2 < 3.1 t cycle -xxxxlxx- variant, -xxxxhxx- variant; 30 g b diff(pk-pk) , b diff(pk-pk) 60 g C 2.5 < 4 t cycle first direction pulse output following direction change n cd amount of target rotation (constant direction) following event until first electrical output pulse of either t w(fwd) or t w(rev) ; refer to figure 3 -xxxxcxx- variant, -xxxxlxx- variant C 1 < 1.5 t cycle -xxxxhxx- variant 1 2 < 3 t cycle first direction pulse output following running mode vibration amount of target rotation (constant direction) following event until first electrical output pulse of either t w(fwd) or t w(rev) ; refer to figure 3 -xxxxcxx- variant C 1 < 2.5 t cycle -xxxxlxx- variant, -xxxxhxx- variant 1 2 < 3.5 t cycle [4] maximum operating frequency specified for output rise time t r < 17 s. parameter determined by satisfactory separation of output pulses t w . if end- user can resolve smaller time between pulses with faster rise time, maximum frequency may be increased up to 12 khz. [5] power-on time includes the time required to complete the internal automatic offset adjust. part is then ready for peak acquisition. [6] power-on frequency <200 hz. higher power-on frequencies may require more input magnetic cycles until directional output pulses are achieved. high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
6 operating characteristics (continued): valid through full operating and temperature ranges, unless otherwise noted characteristics symbol test conditions min. typ. [1] max. unit magnetic characteristics differential input signal range [7] b diff(pk-pk) differential magnetic signal 30 C 1500 g allowable user-induced offset magnitude valid on differential magnetic channels -xxxxcxx- variant, -xxxxlxx- variant, -xxxxhxx- variant C200 C 200 g -xooooxx- variant C300 C 300 g allowable differential sequential signal variation b seq(n+1) / b seq(n) single cycle-to-cycle variation, b seq(n+1) /b seq(n) ; no missed pulses (pulse variant), nor missed edges (-xooooxx- variant); refer to figure 4 0.6 C C C allowable differential sequential signal variation single cycle-to-cycle variation, b seq(n+1) /b seq(n) ; pulses count error but device can recover (pulse variant) and possible missed edges but no flatline (-xooooxx- variant); refer to figure 4 0.35 C C C vibration immunity vibration immunity (calibration) err vib(su) -xxxxcxx- variant 0.5 1.0 C t cycle -xxxxlxx- and -xxxxhxx variant 1 C C t cycle vibration immunity (running mode) err vib(rm) -xxxxcxx- variant C none C t cycle -xxxxlxx- and -xxxxhxx variant 1 C C t cycle asil output asil output safe state v asil_safe_low internal failure detected for 4.75 v < v pu < 5.25 v, r out = 0 , 1.45 k r pu 3.4 k, at sensor output in figure 2 -xxxxxex- variant C C 180 mv time in safe state before self-reset t w(asil_safe) connected as in figure 2 -xxxxxex- variant C 5 C ms [7] differential magnetic field is measured for channel a (f1-f2) and channel b (f2-f3) for pulse width variant and for channel a' (f1-f3) for speed only variant (-xooooxx- variant). magnetic field is measured orthogonally to the front of the package. refer to figure 7 and package drawing. high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
7 ta rget snsn t cycle t cycle b diff b diff = differential input signal; the differential magnetic = target cycle; the amount of rotation that flux sensed by the sensor moves one tooth (or north pole) and one valley (or south pole) across the sensor b seq(n) b seq(n + 1) b, i 2 seq(n+i) b diff(brp) b diff(bop) b diff(pk-pk) b diff(pk-pk) b diff(sp) b diff(sp) b diff(sp) b= diff(sp-sep) (b ) op (b ) rp t cycle channel a channel b s n n s s n figure 3 : defnition of t cycle figure 4 : diferential signal variation figure 5: defnition of switch point separation high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
8 functional description sensing technology the sensor ic contains a single-chip hall-effect circuit that supports a trio of hall elements. these are used in differential pairs to provide electrical signals containing information regard - ing edge position and direction of target rotation. the a19530 is intended for use with magnetic trigger wheels or ferromagnetic targets if back-biased with a magnet. after proper power is applied to the sensor ic, it is capable of providing digital information that is representative of the mag - netic features of a rotating target. the waveform diagrams in figure 7 present the automatic translation of the target profiles, through their induced magnetic profiles, to the digital output signal of the sensor ic. direction detection the sensor ic compares the relative phase of its two differential channels to determine which direction the target is moving. the relative switching order is used to determine the direction, which is communicated through the output protocol. data protocol description when a target passes in front of the device (opposite the branded face of the package case), the a19530 generates an output pulse for each pole pair of the target (-xsxxxxx variant). speed infor - mation is provided by the output pulse rate, while direction of target rotation is provided by the duration of the output pulses. the sensor ic can sense target movement in both the forward and reverse directions. forward rotation (see top panel in figure 6 ): when the target is rotating such that a tooth near the sensor ic (of -fxxxxxx variant) passes from pin 1 to pin 3, this is referred to as forward rotation. this direction is opposite for the -rxxxxxx variant. forward rotation is indicated by output pulse widths of t w(fwd) (45 s typical). reverse rotation (see bottom figure 6 ): when the target is rotating such that a tooth passes from pin 3 to pin 1, it is referred to as reverse rotation for the -fxxxxxx variant. reverse rotation is indicated by output pulse widths of t w(rev) (90 s typical for -xxnxxxx variant, or 180 s typical for -xxwxxxx variant). speed only protocol : when the a19530 is configured with the -xooooxx- variant, the device directly outputs the digital representation of the target from the master differential channel (channel a' in figure 7). figure 6 : target rotation for Cfxxxxxx variant; rxxxxxx variant inverts detected direction of rotation pin 1 pin 3 n n n s n s s s pin 1 pin 3 rotatin (ring magnet or ferromagnetic) gt arget branded face of uc package forward rotation n n n s n s s s rotatin (ring magnet or ferromagnetic) g target reverse rotation branded face of uc package high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
9 b op b op b rp b rp b op device orientation to target ic f3 f2 f1 (pin 1 side) (pin 3 side) package case branded face target magnetic profile +b ?b mechanical position (target moves past device pin 1 to pin 3) s n n target (radial ring magnet) this pole sensed earlier this pole sensed later (top view of package case) channel element pitch channel b channel a channel b element pitch channel a element pitch v out(high) v out(low) v out(high) v out(low) b op b rp b op channel a' n ic internal differential analog signals, v proc device output signal (-fooooxx- variant) device output signal (pulse variant) s n n device orientation to target (pin 1 side) (pin 3 side) ic channel a channel b package case branded face backbiasing magnet (top view of package case) mechanical position (target moves past device pin 1 to pin 3) this tooth sensed earlier this tooth sensed later ic f1 f2f3 +b target ic internal differential analog signals, v proc target magnetic profile south pole north pole b op b op b rp b rp b op channel b channel a v out(high) v out(low) v out(high) v out(low) b op b rp b op channel a' ic internal differential analog signals, v proc device output signal (-fooooxx- variant) device output signal (pulse variant) channel element pitch figure 7 : the magnetic profle refects the features of the target, allowing the sensor ic to present an accurate digital output high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
10 timing in speed only mode with forward direction (-fooooxx option), the rising electrical edge occurs slightly before the sensed mag - netic edge traverses the package branded face ( figure 8). in pulse output protocol with forward direction (-fsxxlxx and -fsxxhxx variants), the pulse appears at the output slightly before the sensed magnetic edge traverses the package branded face. this is true in both forward and reverse target rotation direc - tion, but it must be noticed that the magnetic edge is opposite in reverse direction ( figure 9). with the -xxxxcxx variant, the sensed mechanical edge that stimulates output pulses is kept the same for both forward and reverse rotation, resulting in having the pulse on same pole in forward and reverse rotation ( figure 10). it must also be noticed that in this mode, the pulse location may be different depending on the power-up cycle conditions. direction validation for the -xxxxlxx and -xxxxcxx variants, following a direction change in running mode, direction changes are immediately transmitted to the output ( figure 11 and figure 12). for the -xxxxhxx variant, following a direction change in run - ning mode, output pulses have a width of t w(nd) until direction information is validated ( figure 13). for the -xooooxx option, output transitions are emitted directly after direction change event. figure 8: output protocol (-foooxx- variant) figure 9: output protocol (-fsxxlxx & -fsxxhxx variants) figure 10: output protocol (-fsxxcxx variant) n s forward rotation reverse rotation output (forward rotation) output (reverse rotation) t t n s forward rotation reverse rotation output (forward rotation) output (reverse rotation) t t ?fwd t w(fwd) 45 s t w(rev) ?rev n s forward rotation reverse rotation output (forward rotation) output (reverse rotation) t t ?fwd t w(fwd) 45 s t w(rev) high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
11 figure 11 : example of running mode direction change (-fsxxlxx variant) figure 12: example of running mode direction change (-fsxxcxx variant) figure 13: example of running mode direction change (-fsxxhxx variant) target dif ferential magnetic pro?le t t w(fwd) v out t w(fwd) t w(rev) t w(rev) target rotation forward ta rget rotation reverse s n s s n s n n target dif ferential magnetic pro?le t t w(fwd) v out t w(fwd) t w(rev) t w(rev) target rotation forward ta rget rotation reverse s n s s n s n n target dif ferential magnetic pro?le t t w(fwd) v out t w(fwd) t w(nd) t w(rev) target rotation forward ta rget rotation reverse s n s s n s n n high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
12 start-up detection / calibration when power is applied to the a19530, the sensor ic internally detects the profile of the target. the gain and offset of the detected signals are adjusted during the calibration period, normalizing the internal signal amplitude for the air gap range of the device. the automatic gain control (agc) feature ensures that opera - tional characteristics are isolated from the effects of installation air gap variation. automatic offset adjustment (aoa) is circuitry that compen - sates for the effects of chip, magnet, and installation offsets. this circuitry works with the agc during calibration to adjust signal to the a-to-d input range and allow for acquisition of signal peaks. aoa and agc function separately on the two differential signal channels. direction information is available after calibration is complete. for the -xxxbxxx- variant, the output becomes active at the end of calibration. for the -xxxpxxx- variant, output pulses of t w(nd) are supplied during calibration. figure 14 through figure 16 show where the first output edge may occur for various starting target phases. figure 14: start-up position efect on frst device output switching (-xxxbhxx or -xxxblxx variants) t v out target differential magnetic profile target rotation opposite north pole opposite ns boundary opposite south pole opposite sn boundary device location at power-on t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) n n n n n s s s s figure 15: start-up position efect on frst device output switching (-xxxphxx or -xxxplxx variants) t v out target differential magnetic profile target rotation opposite north pole opposite ns boundary opposite sn boundary opposite south pole device location at power-on t w (fwd) or t w (rev) t w (nd) t w (nd) t w (nd) t w (nd) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (nd) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (nd) t w (nd) t w (nd) t w (fwd) or t w (rev) t w (fwd) or t w (rev) n n n n n s s s s high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
13 figure 16: start-up position efect on frst device output switching (-xxxbcxx variant) t v out target differential magnetic profile target rotation opposite north pole opposite ns boundary opposite south pole opposite sn boundary device location at power-on t w (fwd) or t w (rev) t w (fwd) or t w (rev) n n n n n s s s s t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) t w (fwd) or t w (rev) high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
14 vibration detection algorithms embedded in the ics digital controller detect the presence of target vibration through analysis of the two magnetic input channels. for the -xxxxcxx variant, vibration detection algorithms are activated in calibration only. once the device exits calibration, vibration detection algorithms are deactivated and any direction change or vibration events are transmitted through the output with continuous direction information. for the -xxxxlxx variant, any direction change post calibration is immediately transmitted to the output, and if any subsequent vibration occurs, the output is blanked and no output pulses are emitted for vibrations less than the specified vibration immunity. output pulses containing the proper direction information will resume when direction information is validated on constant target rotation. for the -xxxxhxx variant, in the presence of vibration, output pulses of t w(nd) may occur or no pulses may occur, depending on the amplitude and phase of the vibration. output pulses have a width of t w(nd) until direction information is validated on con - stant target rotation. for the Cxooooxx variant, in the presence of vibration, output transitions representing target vibration profile may occur. figure 17 : output functionality in the presence of running mode target vibration (-xxxbcxx variant) figure 18 : output functionality in the presence of running mode target vibration (-xxxblxx variant) n n n n s s s s target differential magnetic profile normal target rotation vibration normal target rotation t w (fwd) [ or t w (rev) ] t w (fwd) [ or t w (rev) ] t w (fwd) t w (fwd) [ or t w (rev) ] [ or t w (rev) ] t w (rev) [ or t w (fwd) ] n n n n s s s s target differential magnetic profile normal target rotation vibration normal target rotation t w (fwd) [ or t w (rev) ] t w (fwd) [ or t w (rev) ] t w (fwd) t w (fwd) [ or t w (rev) ] [ or t w (rev) ] t w (fwd) [ or t w (rev) ] high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
15 diagnostic capability when diagnostic functionality is activated, the device continuously monitors itself, from the signal chain to output levels and reports a fault by driving the output to the safe state (low level) for a period of time defined by t w(asil_safe) . after this period of time, the device will attempt to recover by self-reset. in case of permanent detectable failure, the sequence is repeated indefinitely (see figure 20). diagnostic option of a19530 allows for system failure detec - tion such as short circuit or open wire. in such case, output goes above or below normal operating voltage range (v diag-low or v diag-high ) depending on the failure mode. table 1 summarizes the possible output states corresponding to each of short or open wire events. figure 20 : asil output behavior (-xxxxxex- variant) table 1 : output open short diagnostic external event type output level hard short between vcc and gnd v pu hard short between vcc and out v cc hard short between out and gnd gnd open vcc v pu open out v pu open gnd v pu figure 19 : output functionality in the presence of running mode target vibration (-xxxphxx variant) n n n n s s s s t target differential magnetic profile normal target rotation vibration normal target rotation t w (nd) t w (nd) t w (nd) t w (nd) t w (fwd) [ or t w (rev) ] t w (fwd) [ or t w (rev) ] t w (fwd) t w (fwd) [ or t w (rev) ] [ or t w (rev) ] t w (fwd) t w (fwd) [ or t w (rev) ] [ or t w (rev) ] t w (nd) . . . . . . . . . normal operations permanent failure v sat-high [v pu ] v diag-high v diag-low v asil-safe-low [gnd] t po t w(asil_safe) t w(asil_safe) high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
16 power derating the device must be operated below the maximum junction tem - perature of the device, t j (max). under certain combinations of peak conditions, reliable operation may require derating supplied power or improving the heat dissipation properties of the appli - cation. this section presents a procedure for correlating factors affecting operating t j . (thermal data is also available on the allegro microsystems website.) the package thermal resistance, r ja , is a figure of merit sum - marizing the ability of the application and the device to dissipate heat from the junction (die), through all paths to the ambient air. its primary component is the effective thermal conductivity, k, of the printed circuit board, including adjacent devices and traces. radiation from the die through the device case, r jc , is a relatively small component of r ja . ambient air temperature, t a , and air motion are significant external factors, damped by overmolding. the effect of varying power levels (power dissipation, p d ), can be estimated. the following formulas represent the fundamental relationships used to estimate t j , at p d . p d = v in i in (1) t = p d r ja (2) t j = t a + t (3) for example, given common conditions such as: t a = 25c, v cc = 12 v , i cc = 8 ma, and r ja = 270c/w, then: p d = v cc i cc = 12 v 8 ma = 96 mw t = p d r ja = 96 mw 270c/w = 25.9c t j = t a + t = 25c + 25.9c = 50.9c a worst-case estimate, p d (max), represents the maximum allow - able power level ( v cc (max), i cc (max)), without exceeding t j (max), at a selected r ja and t a . example: reliability for v cc at t a = 150c, estimated values based on pac - kage uc, using single layer pcb. observe the worst-case ratings for the device, specifically: r ja = 270c/w, t j (max) = 165c, v cc(max) = 24 v, and i cc = 10 ma. calculate the maximum allowable power level, p d (max). first, invert equation 3: t(max) = t j (max) C t a = 165c C 150 c = 15 c this provides the allowable increase to t j resulting from internal power dissipation. then, invert equation 2: p d (max) = t(max) r ja = 15c 270c/w = 55.5 mw finally, invert equation 1 with respect to voltage: v cc(est) = p d (max) i cc = 55.5 mw 10 ma = 5.55 v the result indicates that, at t a , the application and device can dissipate adequate amounts of heat at voltages v cc(est) . compare v cc(est) to v cc (max). if v cc(est) v cc (max), then reli - able operation between v cc(est) and v cc (max) requires enhanced r ja . if v cc(est) v cc(max) , then operation between v cc(est) and v cc (max) is reliable under these conditions. thermal characteristics : may require derating at maximum conditions characteristic symbol test conditions* value unit package thermal resistance r - 1-layer pcb with copper limited to solder pads 270 c/w *additional thermal information available on the allegro website. high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
17 package outline drawing figure 21: package uc, 3-pin sip a b c d e for reference only ? not for tooling use (reference dwg-0000409, rev. 2) dimensions in millimeters ?n ot to scale dimensions exclusive of mold ash, gate burs, and dambar protrusions exact case and lead conguration at supplier discretion within limits shown dambar removal protrusion (12) gate and tie burr area molded lead bar for alignment during shipment active area depth, 0.38 0.05 mm branding scale and appearance at supplier discretion 45 0.85 0.05 0.85 0.05 23 1 b 410 a e branded face 0.42 0.05 1.27 ref 4.00 4.00 r 0.20 all corners r 0.30 all corners 12.20 0.10 18.00 0.1 0 1.80 1.50 0.05 1.50 0.05 c 4.00 0.25 +0.07 ?0.03 mold ejector pin indent 0.25 ref 0.30 ref 0.38 ref 0.25 ref +0.06 ?0.05 +0.06 ?0.07 +0.06 ?0.07 +0.06 ?0.05 1.80 f 1.42 1.42 0.58 f f f f f1 f2 f3 f hall elements (f1, f2, and f3); not to scale d lines 1, 2, 3: max. 5 characters per line line 1: 5-digit part number line 2: 4-digit date code line 3: characters 5, 6, 7, 8 of assembly lot number standard branding reference vi ew date code lot number xxxxx high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com
18 for the latest version of this document, visit our website: www.allegromicro.com revision history number date description C september 13, 2018 initial release copyright ?2018, allegro microsystems, llc allegro microsystems, llc reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegros products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of allegros product can reasonably be expected to cause bodily harm. the information included herein is believed to be accurate and reliable. however, allegro microsystems, llc assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. copies of this document are considered uncontrolled documents. high feature three-wire hall-effect transmission speed and direction sensor ic a19530 allegro microsystems, llc 955 perimeter road manchester, nh 03103-3353 u.s.a. www.allegromicro.com

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