note: for detailed information on purchasing options, contact your local allegro field applications engineer or sales representative. allegro microsystems, inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no respon - sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. recommended substitutions: fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 for existing customer transition, and for new customers or new appli - cations, refer to allegro sales. date of status change: november 2, 2009 this device is no longer in production. the device should not be purchased for new design applications. samples are no longer available. discontinued product
acs755xcb-150 description the allegro acs755 family of current sensor ics provides economical and precise solutions for dc 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 circuit with a copper conduction path located near the die. applied current flowing through this copper conduction path generates a magnetic field which the hall ic converts 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 will be valid when a current flows through the primary copper conduction path from terminal 4 to terminal 5, which is the path used for current sampling. the internal resistance of this conductive path is 100 ? typical, providing low power loss. acs755150-ds rev. 9 features and benefits ? monolithic hall ic for high reliability ? single +5 v supply ? 3 kv rms isolation voltage between terminals 4/5 and pins 1/2/3 for up to 1 minute ? 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 dc currents fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor continued on the next page? package: 5 pin package (leadform psf) typical application +5 v v ou t r f c f c byp 0.1 f ip+ ip? 2 gnd 4 5 acs755 3 1 viout vcc i p application 1. the acs755 outputs an analog signal, v out . that varies linearly with the unidirectional dc primary sampled current, i p , within the range specified. c f is recommended for noise management, with values that depend on the application.
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 2 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com 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 signal leads (pins 1 through 3). this allows the acs755 family of sensor ics 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 (pb) free. all leads are plated with 100% matte tin, and there is no pb inside the package. the heavy gauge leadframe is made of oxygen-free copper. description (continued) absolute maximum ratings characteristic symbol notes rating units supply voltage v cc 16 v reverse supply voltage v rcc ?16 v output voltage v iout 16 v reverse output voltage v riout ?0.1 v maximum basic isolation voltage v iso 353 vac, 500 vdc, or v pk v maximum rated input current i in 200 a output current source i out(source) 3ma output current sink i out(sink) 10 ma nominal operating ambient temperature t a range k ?40 to 125 oc range s ?20 to 85 oc maximum junction t j (max) 165 oc storage temperature t stg ?65 to 170 oc tv america certificate number: u8v 04 11 54214 001 fire and electric shock en60950-1:2001 selection guide part number t op (c) primary sampled current, i p (a) sensitivity sens (typ.) (mv/a) bandwidth (khz) package packing 1 terminals signal pins acs755kcb-150-psf 2 ?40 to 125 150 26 35 straight formed 170 pieces per bulk bag 1 contact allegro for additional packing options. 2 variant is in production but has been determined to be last time buy. this classification indicates that the variant is obsolet e and notice has been given. sale of the variant is currently restricted to existing customer applications. the variant should not be purchased for n ew design applications because of obsolescence in the near future. samples are no longer available. status date change may 4, 2009. deadline for recei pt of last time buy orders is november 4, 2009.
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 3 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com ip+ ip? viout gnd vcc 4 5 3 2 1 terminal list table number name description 1 vcc device power supply pin 2 gnd signal ground pin 3 viout analog output signal pin 4 ip+ terminal for current being sampled 5 ip? terminal for current being sampled functional block diagram pin-out diagram amp out vcc +5 v viout gnd filter dynamic offset cancellation 0.1 f ip? ip+ gain temperature coefficient offset voltage regulator trim control to all subcircuits
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 4 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com electrical characteristics, over operating ambient temperature range unless otherwise stated characteristic symbol test conditions min. typ. max. units primary sampled current i p 0 ? 150 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 = +50a; t a = 25c ? 100 ? ? isolation voltage v iso pins 1-3 and 4-5; 60 hz, 1 minute 3.0 ? ? kv performance characteristics, -20c to +85c , v cc = 5 v unless otherwise specified propagation time t prop i p = +50 a, t a = 25c ? 4 ? s response time t response i p = +50 a, t a = 25c ? 10 ? s rise time t r i p = +50 a, t a = 25c ? 10 ? s frequency bandwidth f ?3 db, t a = 25c ? 35 ? khz sensitivity sens over full range of i p , t a = 25c ? 26 ? mv/a over full range of i p 24.5 ? 27.5 mv/a noise v noise peak-to-peak, t a = 25c, no external filter ?50 ?mv linearity e lin over full range of i p ? ? 0.95 % zero current output voltage v out(q) i = 0 a, t a = 25c ? 0.6 ? v electrical offset voltage (magnetic error not included) v oe i = 0 a, t a = 25c ?15 ? 15 mv i = 0 a ?25 ? 25 mv magnetic offset error i errom i = 0 a, after excursion of 150 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 +125c , v cc = 5 v unless otherwise specified propagation time t prop i p = +50 a, t a = 25c ? 4 ? s response time t response i p = +50 a, t a = 25c ? 10 ? s rise time t r i p = +50 a, t a = 25c ? 10 ? s frequency bandwidth f ?3 db, t a = 25c ? 35 ? khz sensitivity sens over full range of i p , t a = 25c ? 26 ? mv/a over full range of i p 24 ? 28 mv/a noise v noise peak-to-peak, t a = 25c, no external filter ?50 ?mv linearity e lin over full range of i p ? ? 0.95 % zero current output voltage v out(q) i = 0 a, t a = 25c ? 0.6 ? v electrical offset voltage (magnetic error not included) v oe i = 0 a, t a = 25c ?15 ? 15 mv i = 0 a ?40 ? 40 mv magnetic offset error i errom i = 0 a, after excursion of 150 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 ? ? 7.0 %
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 5 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com sensitivity (sens). the change in device 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 amplifier gain (mv/g). the linear ic amplifier gain is pro- grammed 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 amplifier gain (mv/g) and the noise floor for the allegro hall effect linear ic ( 1 g). the noise floor 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 ic varies in direct proportion to the primary current through its full-scale amplitude. nonlinearity in the output can be attrib- uted to the saturation of the flux concentrator approaching the full-scale current. the following equation is used to derive the linearity: where v iout_? full-scale ip (v) is the output voltage when the sampled current approximates 0.25 ? i p (max), and v iout_? full-scale ip (v) is the output voltage when the sampled current approximates 0.75 ? i p (max). quiescent output voltage (v iout(q) ). the output of the device when the primary current is zero. for a unipolar supply voltage, it nominally remains at 0.6. variation in v iout(q) can be attributed to the resolution of the allegro linear ic quiescent voltage trim and thermal drift. electrical offset voltage (v oe ). the deviation of the device out- put from its ideal quiescent value due to nonmagnetic causes. magnetic offset error (i errom ). the magnetic offset is due to the residual magnetism (remnant field) of the core material. the magnetic offset error is highest when the magnetic circuit has been saturated, usually when the device has been subjected to a full-scale or high-current overload condition. the magnetic offset is largely dependent on the material used as a flux concentrator. the larger magnetic offsets are observed at the lower operating temperatures. accuracy (e tot ). the accuracy represents the maximum devia- tion of the actual output from its ideal value. this is also known as the total output 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 at the zero current flow at 25c, with- out the effects of temperature. ?? 0 a over temperature. accuracy at the zero current flow including temperature effects. ?? full-scale current at 25c. accuracy at the the full-scale current at 25c, without the effects of temperature. ?? full-scale current over temperature. accuracy at the full- scale current flow including temperature effects. definitions of accuracy characteristics 100 1 ? v iout _ 3 / 4 full-scale ip ? v iout(q) v iout _ 1 / 4 full-scale ip ? v iout(q) ?? 3
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 6 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com definitions of dynamic response characteristics propagation delay (t prop ). the time required for the device output to reflect a change in the primary current signal. propaga- tion delay is attributed to inductive loading within the linear ic package, as well as in the inductive loop formed by the primary conductor geometry. propagation delay can be considered as a fixed time offset and may be compensated. 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 rise time (t r ). the time interval between a) when the device 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 device, 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. response time (t response ). the time interval between a) when the primary current signal reaches 90% of its final value, and b) when the device reaches 90% of its output corresponding to the applied current. output voltage versus sampled current accuracy at 0 a and at full-scale current increasing v iout (v) +i p (a) accuracy accuracy 25c only accuracy 25c only accuracy 0 a vr oe $ temp erature average v iout ?i p (a) vr oe $ temp erature decreasing v iout (v) i p(max) full scale
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 7 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com step response 50 a excitation signal, t a =25c x 150 device output (mv) excitation signal
fully integrated, hall effect-based linear current sensor ic with high voltage isolation and a low-resistance current conductor acs755xcb-150 8 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com copyright ?2004-2009, allegro microsystems, inc. the products described herein are manufactured under one or more of the following u.s. patents: 5,619,137; 5,621,319; 6,781,359 ; 7,075,287; 7,166,807; 7,265,531; 7,425,821; or other patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be required to per- mit 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?s products are not to be used in life support devices or systems, if a failure of an allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. 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. for the latest version of this document, visit our website: www.allegromicro.com package cb, 5-pin package leadform psf creepage distance, current terminals to signal pins: 7.25 mm clearance distance, current terminals to signal pins: 7.25 mm package mass: 4.63 g typical 5o5 23 23.500.5 1 4 5 a 2.750.10 1.500.10 14.00.2 4.00.2 3.00.2 2.90.2 3.50.2 13.000.10 4.400.10 10.000.10 0.510.10 7.000.10 1.90.2 a b b 1.91 .075 ? 0.8 .031 ? 1.5 .059 recommended pcb layout view 0.381 +0.060 ?0.030 1 nnnnnnn ttt - aaa lllllll yyww branding scale and appearance at supplier discretion dambar removal intrusion for reference only; not for tooling use (reference dwg-9111, dwg-9110) dimensions in millimeters dimensions exclusive of mold flash, gate burrs, and dambar protrusions exact case and lead configuration at supplier discretion within limits shown standard branding reference view branded face n = device part number t = temperature code a = amperage range l = lot number y = last two digits of year of manufacture w = week of manufacture = supplier emblem
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