ACS723 High-Accuracy, Galvanically Isolated Current Sensor IC with Small Footprint SOIC8 Package FEATURES AND BENEFITS DESCRIPTION Patented integrated digital temperature compensation The Allegro ACS723 current sensor IC is an economical and circuitry allows for near closed loop accuracy over precise solution for AC or DC current sensing in industrial, temperature in an open loop sensor commercial, and communications systems. The small package UL60950-1 (ed. 2) certified is ideal for space constrained applications while also saving costs due to reduced board area. Typical applications include Dielectric Strength Voltage = 2.4 kVrms motor control, load detection and management, switched-mode Basic Isolation Working Voltage = 420 Vpk / 297 Vrms power supplies, and overcurrent fault protection. Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and The device consists of a precise, low-offset, linear Hall filter design techniques sensor circuit with a copper conduction path located near the Pin-selectable bandwidth: 80 kHz for high bandwidth surface of the die. Applied current flowing through this copper applications or 20 kHz for low-noise performance conduction path generates a magnetic field which is sensed by 0.65 m primary conductor resistance for low power the integrated Hall IC and converted into a proportional voltage. loss and high inrush current withstand capability Device accuracy is optimized through the close proximity of the Small footprint, low-profile SOIC8 package suitable for magnetic field to the Hall transducer. A precise, proportional space-constrained applications voltage is provided by the low-offset, chopper-stabilized Integrated shield virtually eliminates capacitive BiCMOS Hall IC, which includes Allegros patented digital coupling from current conductor to die, greatly temperature compensation, resulting in extremely accurate suppressing output noise due to high dv/dt transients performance over temperature. The output of the device has 4.5 to 5.5 V, single supply operation a positive slope when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 Output voltage proportional to AC or DC current and 4), which is the path used for current sensing. The internal Factory-trimmed sensitivity and quiescent output voltage resistance of this conductive path is 0.65 m typical, providing for improved accuracy low power loss. Continued on the next page The terminals of the conductive path are electrically isolated from the sensor leads (pins 5 through 8). This allows the TV America UL Certified File Certificate Number: ACS723 current sensor IC to be used in high-side current sense No.: US-32848-UL U8V 18 02 54214 041 CB 14 11 54214 031 applications without the use of high-side differential amplifiers or other costly isolation techniques. PACKAGE: 8-pin SOIC (suffix LC) Continued on the next page Not to scale The ACS723 outputs an 8 1 analog signal, V , that IOUT IP+ VCC changes, proportionally, +I P ACS723 with the bidirectional AC or 7 2 DC primary sensed current, IP+ VIOUT I , within the specified P I measurement range. The C P BYPASS BW SEL pin can be used 6 0.1 F 3 BW SEL IP to select one of the two I bandwidths to optimize the P C L noise performance. Grounding 4 5 the BW SEL pin puts the part GND IP in the high bandwidth, 80 kHz, mode. Typical Application ACS723-DS, Rev. 6 September 3, 2019 MCO-0000538High-Accuracy, Galvanically Isolated Current Sensor IC ACS723 with Small Footprint SOIC8 Package FEATURES AND BENEFITS (continued) DESCRIPTION (continued) Chopper stabilization results in extremely stable quiescent The ACS723 is provided in a small, low-profile surface-mount output voltage SOIC8 package. The leadframe is plated with 100% matte tin, Nearly zero magnetic hysteresis which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except Ratiometric output from supply voltage for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory. SELECTION GUIDE Sens(Typ) I T PR A 1 Part Number at V = 5 V Packing CC (A) (C) (mV/A) 2 ACS723LLCTR-05AB-T 5 400 2 ACS723LLCTR-10AU-T 10 2 ACS723LLCTR-10AB-T 10 200 2 ACS723LLCTR-20AU-T 20 40 to 150 Tape and Reel, 3000 pieces per reel 2 ACS723LLCTR-20AB-T 20 100 2 ACS723LLCTR-40AU-T 40 2 ACS723LLCTR-40AB-T 40 50 2 ACS723LLCTR-50AB-T 50 40 1 Contact Allegro for additional packing options. 2 Variant not intended for automotive applications. 2 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com