current sensor: acs754xcb-050 1 1 5 n o r t h e a s t c u t o f f , b o x 1 5 0 3 6 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds the allegro acs754 family of current sensors provides economical and precise solutions for current sensing in industrial, commercial, and communications systems. the device package allows easy implementation by the customer. typical applications include: motor control, load detection and management, power distri- bution, and overcurrent fault protection. the sensor consists of a precision linear hall ic, which is optimized to an internal magnetic circuit to increase device sensitivity. the combination of a precisely controlled self-aligning assembly process (patents pending), and the factory-pro- grammed precision of the linear hall sensor, result in high-level performance and product uniformity. the primary conductor used for current sensing (terminals 4 and 5) is designed for extremely low power loss. these power terminals also are electrically isolated from the sensor leads (pins 1, 2, and 3). this allows the acs754 family of sensors to be used in applications requiring electrical isolation, without using optoisolators or other costly isolation techniques. the output of this device has a positive slope (>v cc ? 2) when an increasing cur- rent f ows from terminal 4 to terminal 5. the acs754 family is provided in lead-free packages (leadframe coating 100% matte tin) . 5 4 3 2 1 pin 1: vcc pin 2: gnd pin 3: vout terminal 4: ip+ terminal 5: ipC 5 4 3 2 2 1 package cb-psf 5 5 4 3 3 2 2 1 package cb-pss a b so lute max i mum rat ings supply voltage, v cc .......................................... 16 v output voltage, v out ........................................ 16 v output current source, i out(source) ................. 3 ma output current sink, i out(sink) ....................... 10 ma operating temperature, ambient, t a ambient, t a ambient, t , l range ..................... C40 to 150oc ambient, t a ambient, t a ambient, t , s range ....................... C20 to 85oc maximum junction, t j(max) ............................. 165c maximum storage temperature, t s ............... 170c package cb-pff package cb-pff use the following complete part numbers when ordering: features and benef ts ? monolithic hall ic for high reliability ? single +5 v supply ? high isolation voltage ? automotive temperature range ? end-of-line factory-trimmed for gain and offset ? ultra-low power loss: low resistance of primary conductor ? ratiometric output from supply voltage ? low thermal drift of offset voltage ? on-chip transient protection ? small package size, with easy mounting capability applications ? automotive systems ? industrial systems ? motor control ? servo systems ? power conversion ? battery monitors part number signal pins signal pins terminals ambient ACS754LCB-050-PFF formed formed C40 to 150c acs754lcb-050-psf formed straight acs754lcb-050-pss straight straight acs754scb-050-pff formed formed C20 to 85c acs754scb-050-psf formed straight acs754scb-050-pss straight straight straight straight tv america certif cate number: u8v 04 11 54214 001
2 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 amp out vcc +5v pin 1 pin 3 vout gnd pin 2 filter dynamic of fset cancellatio n ipC terminal 5 ip+ terminal 4 0.1 f functional block diagram
3 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 characteristic symbol test conditions min. typ. max. units primary sensed current i p C50 C 50 a supply voltage v cc 4.5 5.0 5.5 v supply current i cc v cc = 5.0 v, output open 6.5 8 10 ma output resistance r out i out = 1.2 ma C 1 2 primary conductor resistance r primary i p = 100a; t a = 100a; t a = 100a; t = 25c a = 25c a C 100 C ? pins 1-3 and 4-5; 60 hz, 1 minute 3.0 C C kv performance characteristics, -20c to +85c , v cc = 5 v unless otherwise specif ed propagation time t prop i p = 50 a, t = 25c C 4 C s response time t response i p = 50 a, t = 25c C 12 C s rise time t r i p = 50 a, t = 25c C 11 C s frequency bandwidth f C3 db , t = 25c C 33 C khz sensitivity sens i p , t = 25c C 40 C mv/a i p 37.8 C 42.0 mv/a noise v noise peak-to-peak, t = 25c, no external f lter C 65 C mv nonlinearity e lin i p C C 1.5 % symmetry e sym i p 98 100 102 % zero current output voltage v out(q) i = 0 a, t = 25c C 2.5 C v electrical offset voltage (magnetic error not included) v oe i = 0 a, t = 25c C10 C 10 mv i = 0 a C20 C 20 mv magnetic offset error v om i = 0 a, after excursion of 100 a C 0.1 0.30 a total output error (including all offsets) e tot i p , t = 25c C 1.0 C % i p C C 6.0 % performance characteristics, -40c to +150c , v cc = 5 v unless otherwise specif ed propagation time t prop i p = 50 a, t = 25c C 4 C s response time t response i p = 50 a, t = 25c C 12 C s rise time t r i p = 50 a, t = 25c C 11 C s frequency bandwidth f C3 db , t = 25c C 33 C khz sensitivity sens i p , t = 25c C 40 C mv/a i p 36.0 C 42.8 mv/a noise v noise peak-to-peak, t = 25c, no external f lter C 65 C mv nonlinearity e lin i p C C 1.8 % symmetry e sym i p 98 100 102 % zero current output voltage v out(q) i = 0 a, t = 25c C 2.5 C v electrical offset voltage (magnetic error not included) v oe i = 0 a, t = 25c C10 C 10 mv i = 0 a C35 C 35 mv magnetic offset error v om i = 0 a, after excursion of 100 a C 0.1 0.40 a total output error (including all offsets) e tot i p , t = 25c C 1.0 C % i p C C 9.9 % electrical characteristics, over operating ambient temperature range unless otherwise stated
4 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 1 0 0 1 C [ { [ { v o u t _ f u l l - s c a l e a m p e r e s C v o u t ( q ) ? ? g a i n ? ? % s a t ( ) 2 ( v o u t _ h a l f - s c a l e a m p e r e s C v o u t ( q ) ) 1 0 0 [ [ v o u t _ + f u l l - s c a l e a m p e r e s C v o u t ( q ) v o u t ( q ) C v o u t _ C f u l l - s c a l e a m p e r e s estt(es) tecaesesoroutputresposetoa1caetrouteprmarcouctortesesttste prouctoftemaetccrcutsestt()atelearamplera(m)telearamplerastrmmeatte factortooptmetesestt(m)fortefull-scalecurretofteece ose( o ) teprouctoftelearamplera(m)ateoseoorfortelleroalleffectlear(1) teoseoorserefromtetermalasotoseosereallelemetsteose(m)tesestt(m )proestesmallestcurrettatteecesaletoresole eart( ) teereetocteoltaeoutputfromtesesoraresrectproportototeprmarcurrettrou tsfull-scaleampltueeartreealstemamumeatofromteealtrasfercurefortstrasucer oleartte outputcaeattrutetoteaaratoacrosstemperatureasaturatoofte ucocetratorapproactefull-scalecur- rettefolloeuatosusetoereteleart def nitions of accuracy characteristics where gain = the gain variation as a function of temperature changes from 25c, % sat = the percentage of saturation of the ux concentrator, which becomes signif cant as the current being sensed approaches full-scale i p , and v outfull-scale amperes v outfull-scale amperes v = the output voltage (v) when the sensed current approximates full-scale i p . symmetry (e sym ): the degree to which the absolute voltage output from the sensor varies in proportion to either a positive or nega- tive full-scale primary current. the following equation is used to derive symmetry: quiescent output voltage (v out(q) ): the output of the sensor when the primary current is zero. for a unipolar supply voltage, i t nominally remains at v cc 2. thus, v cc 2. thus, v cc cc = 5 v translates into v out(q) = 2.5 v. variation in v out(q) can be attributed to the resolution of the allegro linear ic quiescent voltage trim, magnetic hysteresis, and thermal drift. electrical offset voltage (v oe ): the deviation of the device output from its ideal quiescent value of v cc 2 due to nonmagnetic causes. cc 2 d u e t o n o n m a g n e t i c c a u s e s . cc magnetic offset error (v om ): the magnetic offset is due to the residual magnetism (remnant f eld) of the core material. the magnetic offset error is highest when the magnetic circuit has been saturated, usually when the device has been subected to a full-scale or high- current overload condition. the magnetic offset is largely dependent on the material used as a ux concentrator. the larger magnetic offsets are observed at the lower operating temperatures. accuracy (e tot ): the accuracy represents the maximum deviation of the actual output from its ideal value. this is also known as the total ouput error. the accuracy is illustrated graphically in the output voltage versus current chart on the following page. accuracy is divided into four areas: ? ? ? ?
5 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 + i p ( a ) a c c u r a c y a c c u r a c y a c c u r a c y 2 5 c o n l y a c c u r a c y 2 5 c o n l y a c c u r a c y 2 5 c o n l y a c c u r a c y 0 a v r o e ? t e m p e r a t u r e a v e r a g e v o u t C i p ( a ) v r o e ? t e m p e r a t u r e v r o e ? t e m p e r a t u r e i n c r e a s i n g v o u t ( v ) d e c r e a s i n g v o u t ( v ) C 5 0 a 5 0 a f u l l s c a l e output voltage vs. current, illustrating sensor accuracy at 0 a and at full-scale current
6 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 def nitions of dynamic response characteristics propagation delay (t prop ): the time required for the sensor output to ref ect a change in the primary current signal. propagation delay is attributed to inductive loading within the linear ic package, as well as in the induc- tive loop formed by the primary conductor geometry. propagation delay can be considered as a f xed time offset and may be compensated. response time (t response ): the time interval between a) when the primary current signal reaches 90% of its f nal value, and b) when the sensor reaches 90% of its output corresponding to the applied current. rise time (t r ): the time interval between a) when the sensor reaches 10% of its full scale value, and b) when it reaches 90% of its full scale value. the rise time to a step response is used to derive the bandwidth of the current sensor, in which ?(C3 db) = 0.35 / t r . both t r and t r and t r response are detrimentally affected by eddy current losses observed in the conductive ic ground plane and, to varying degrees, in the ferrous f ux concentrator within the current sensor package. primary current transducer output 90 0 i (% ) propagation time, t prop t primary current transducer output 90 0 i (% ) response time, t response t primary current transducer output 90 10 0 i (% ) rise time, t r t
7 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 step response, i p = 0 to 50 a, no external f lter acs754 output (mv) acs754 output (mv) applied step (a) standards and physical specif cations parameter specif cation flammability (package molding compound) ul recognized to ul 94v-0 fire and electric shock ul60950-1:2003 en60950-1:2001 can/csa c22.2 no. 60950-1:2003 creepage distance, current terminals to sensor pins 7.25 mm clearance distance, current terminals to sensor pins 7.25 mm package mass 4.63 g typical
8 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 package cb-pff
9 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 copyright ? 2003, allegro microsystems, inc. acs754050-ds current sensor: acs754xcb-050 package cb-psf ??? ?? ?? ?? ???? ??? ???? ? ???? ???? ???? ??? ???? ???? ???? ???? ???? ?? ???? ? ???? ? ? ?? ? ???? ???? ???? ???? ?? ? ???? ??? ???? ?? ???? ?? ???? ???? ?? ? ? ? ? ? ? ???????????????????????????????????????????????????????????????? ???????????????????????????????????????????????????????????????? ? ???????????????????????? package cb-pss ?? ???? ??? ???? ?? ???? ?? ???? ? ???? ? ???? ? ? ?? ? ???? ???? ??? ???? ???? ???? ???? ???? ???? ???? ?? ???? ???? ?? ?? ???? ???? ?? ???? ???? ? ? ? ? ? ? ???????????????????????????????????????????????????????????????? ???????????????????????????????????????????????????????????????? ???????????????????????? ? the products described herein are manufactured under one or more of the following u.s. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such de par tures from the detail spec i f ca tions as may be required to permit im- provements in the per for mance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegro products are not authorized for use as critical components in life- support devices or sys tems without express written approval. the in for ma tion in clud ed herein is believed to be ac cu rate and reliable. how ev er, allegro microsystems, inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use.
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