current sensor: acs754xcb-050 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 5 4 3 2 1 pin 1: vcc pin 2: gnd pin 3: vout terminal 4: ip+ terminal 5: ip? 5 4 3 2 1 package cb-psf 5 4 3 2 1 package cb-pss ab so lute max i mum rat ings supply voltage, v cc .......................................... 16 v reverse supply voltage, v rcc ........................ ? 16 v output voltage, v out ........................................ 16 v reverse output voltage, v rout ...................... ? 0.1 v output current source, i out(source) ................. 3 ma output current sink, i out(sink) ....................... 10 ma operating temperature, ambient, t a , l range ..................... ?40 to 150oc ambient, t a , s range ....................... ?20 to 85oc maximum junction, t j(max) ............................. 165c maximum storage temperature, t s .... ?65 to 170c package cb-pff use the following complete part numbers when ordering: features and bene ts ? monolithic hall ic for high reliability ? single +5 v supply ? 3 kv rms isolation voltage between terminals 4/5 and pins 1/2/3 ? 35 khz bandwidth ? automotive temperature range ? end-of-line factory-trimmed for gain and offset ? ultra-low power loss: 100 ? internal conductor resistance ? ratiometric output from supply voltage ? extremely stable output offset voltage ? small package size, with easy mounting capability ? output proportional to ac and dc currents applications ? automotive systems ? industrial systems ? motor control ? servo systems ? power conversion ? battery monitors part number signal pins terminals ambient acs754lcb-050-pff formed formed ?40 to 150c acs754lcb-050-psf formed straight acs754lcb-050-pss straight straight acs754scb-050-pff formed formed ?20 to 85c ACS754SCB-050-PSF formed straight acs754scb-050-pss straight straight tv america certi cate number: u8v 04 11 54214 001 the allegro acs75x family of current sensors provides economical and precise solutions for current sensing in industrial, automotive, commercial, and communications systems. the device package allows for easy implementation by the customer. typical applications include motor control, load detection and management, power supplies, and overcurrent fault protection. the device consists of a precision, low-offset linear hall sensor circuit with a copper conduction path located near the die. applied current owing through this copper conduction path generates a magnetic eld which is sensed by the integrated hall ic and converted into a proportional voltage. device accuracy is optimized through the close proximity of the magnetic signal to the hall transducer. a precise, proportional voltage is provided by the low-offset, chopper- stabilized bicmos hall ic, which is programmed for accuracy at the factory. the output of the device has a positive slope (>v cc / 2) when an increasing current ows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sensing. the internal resistance of this conductive path is typically 100 ? , providing low power loss. the thickness of the copper conductor allows survival of the device at up to 5 overcurrent conditions. the terminals of the conductive path are electrically isolated from the sensor leads (pins 1 through 3). this allows the acs75x family of sensors to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques. the device is fully calibrated prior to shipment from the factory. the acs75x family is lead-free. all leads are coated with 100% matte tin, and there is no lead inside the package. the heavy gauge leadframe is made of oxygen-free copper.
2 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 current sensor: acs754xcb-050 amp out vcc +5 v pin 1 pin 3 vout gnd pin 2 filter dynamic offset cancellation 0.1 f ip? ip+ gain temperature coefficient offset voltage regulator trim control to all subcircuits terminal 5 terminal 4 functional block diagram
3 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 current sensor: acs754xcb-050 characteristic symbol test conditions min. typ. max. units primary sensed current i p ?50 ? 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 ? 1 2 ? output capacitance load c load vout to gnd ? ? 10 nf output resistive load r load vout to gnd 4.7 ? ? k ? primary conductor resistance r primary i p = 100a; t a = 25c ? 100 ? ? pins 1-3 and 4-5; 60 hz, 1 minute 3.0 ? ? kv performance characteristics, -20c to +85c , v cc = 5 v unless otherwise speci ed propagation time t prop i p = 50 a, t a = 25c ? 4 ? s response time t response i p = 50 a, t a = 25c ? 12 ? s rise time t r i p = 50 a, t a = 25c ? 11 ? s frequency bandwidth f ?3 db , t a = 25c ? 35 ? khz sensitivity sens over full range of i p , t a = 25c ? 40 ? mv/a over full range of i p 37.8 ? 42.0 mv/a noise v noise peak-to-peak, t a = 25c, no external lter ?65 ?mv nonlinearity e lin over full range of i p ? ? 1.5 % symmetry e sym over full range of i p 98 100 102 % zero current output voltage v out(q) i = 0 a, t a = 25c ? v cc / 2 ? v electrical offset voltage (magnetic error not included) v oe i = 0 a, t a = 25c ?10 ? 10 mv i = 0 a ?20 ? 20 mv magnetic offset error i errom i = 0 a, after excursion of 100 a ? 0.1 0.30 a total output error (including all offsets) e tot over full range of i p , t a = 25c ? 1.0 ? % over full range of i p ? ? 5.0 % performance characteristics, -40c to +150c , v cc = 5 v unless otherwise speci ed propagation time t prop i p = 50 a, t a = 25c ? 4 ? s response time t response i p = 50 a, t a = 25c ? 12 ? s rise time t r i p = 50 a, t a = 25c ? 11 ? s frequency bandwidth f ?3 db , t a = 25c ? 35 ? khz sensitivity sens over full range of i p , t a = 25c ? 40 ? mv/a over full range of i p 36.0 ? 42.8 mv/a noise v noise peak-to-peak, t a = 25c, no external lter ?65 ?mv nonlinearity e lin over full range of i p ? ? 1.8 % symmetry e sym over full range of i p 98 100 102 % zero current output voltage v out(q) i = 0 a, t a = 25c ? v cc / 2 ? v electrical offset voltage (magnetic error not included) v oe i = 0 a, t a = 25c ?10 ? 10 mv i = 0 a ?35 ? 35 mv magnetic offset error i errom i = 0 a, after excursion of 100 a ? 0.1 0.40 a total output error (including all offsets) e tot over full range of i p , t a = 25c ? 1.0 ? % over full range of i p ? ? 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 acs754050-ds, rev. 2 current sensor: acs754xcb-050 100 1C [ { [ { v out_full-scale amperes C v out(q) ? gain % sat ( ) 2( v out_half-scale amperes C v out(q) ) 100 [ [ v out_+full-scale amperes ? v out(q) v out(q) ? v out_?full-scale amperes sensitivity (sens): the change in sensor output in response to a 1 a change through the primary conductor. the sensitivity is the product of the magnetic circuit sensitivity (g / a) and the linear ic ampli er gain (mv/g). the linear ic ampli er gain is trimmed at the factory to optimize the sensitivity (mv/a) for the full-scale current of the device. noise (v noise ): the product of the linear ic ampli er gain (mv/g) and the noise oor for the allegro hall effect linear ic ( 1 g). the noise oor is derived from the thermal and shot noise observed in hall elements. dividing the noise (mv) by the sensitivity (mv/ a) provides the smallest current that the device is able to resolve. linearity (e lin ): the degree to which the voltage output from the sensor varies in direct proportion to the primary current through its full-scale amplitude. linearity reveals the maximum deviation from the ideal transfer curve for this transducer. nonlinear ity in the output can be attributed to the gain variation across temperature and saturation of the ux concentrator approaching the full-scale cur- rent. the following equation is used to derive the linearity: de nitions of accuracy characteristics where ? gain = the gain variation as a function of temperature changes from 25oc, % sat = the percentage of saturation of the ux concentrator, which becomes signi cant as the current being sensed approaches full-scale i p , and v out_full-scale amperes = 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, it nominally remains at v cc 2. thus, v 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. magnetic offset error (i errom ): the magnetic offset is due to the residual magnetism (remnant eld) of the core material. the mag- netic offset error is highest when the magnetic circuit has been saturated, usually when the device has been subjected to a ful l-scale or high-current overload condition. the magnetic offset is largely dependent on the material used as a ux concentrator. the larger mag- netic 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: ? 0 a at 25c: accuracy of sensing zero current ow at 25c, without the effects of temperature. ? 0 a over temperature: accuracy of sensing zero current ow including temperature effects. ? full-scale current at 25c: accuracy of sensing the full-scale current at 25c, without the effects of temperature. ? full-scale current over ? temperature: accuracy of sensing full-scale current ow including temperature effects.
5 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 current sensor: acs754xcb-050 +i p (a) accuracy accuracy accuracy 25c only accuracy 25c only accuracy 25c only accuracy 0a vr oe ? temperature average v out ?i p (a) vr oe ? temperature vr oe ? temperature increasing v out (v) decreasing v out (v) ?50 a 50 a full scale 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 acs754050-ds, rev. 2 current sensor: acs754xcb-050 de nitions of dynamic response characteristics propagation delay (t prop ): the time required for the sensor output to re 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 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 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 ?(?3 db) = 0.35 / t r . both t r and t response are detrimentally affected by eddy current losses observed in the conductive ic ground plane and, to varying degrees, in the ferrous 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 acs754050-ds, rev. 2 current sensor: acs754xcb-050 step response, i p = 0 to 50 a, no external lter acs754 output (mv) applied step (a) standards and physical speci cations parameter speci 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 acs754050-ds, rev. 2 current sensor: acs754xcb-050 device branding key (two alternative styles are used) acs754 t cb050 yywwa acs allegro current sensor 754 device family number t operating ambient temperature range code [l or s] cb package type designator 050 maximum measurable current yy manufacturing date code: calendar year (last two digits) ww manufacturing date code: calendar week a manufacturing date code: shift code acs754 t cb050 l...l yyww acs allegro current sensor 754 device family number t operating ambient temperature range code [l or s] cb package type designator 050 maximum measurable current l...l manufacturing lot code yy manufacturing date code: calendar year (last two digits) ww manufacturing date code: calendar week
9 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 current sensor: acs754xcb-050 package cb-pff
10 115 northeast cutoff, box 15036 worcester, massachusetts 01615-0036 (508) 853-5000 acs754050-ds, rev. 2 current sensor: acs754xcb-050 the products described herein are manufactured under one or more of the following u.s. patents: 5,045,920; 5,264,783; 5,44 2,283; 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 ca tions as may be required to permit improvements 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. ass umes 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. copyright ? 2004, 2005, allegromicrosystems, inc. package cb-psf package cb-pss
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