ACS711 Hall-Effect Linear Current Sensor with Overcurrent Fault Output for <100 V Isolation Applications FEATURES AND BENEFITS DESCRIPTION No external sense resistor required single package solution The Allegro ACS711 provides economical and precise Reduced power loss: solutions for AC or DC current sensing in <100 V audio, 0.6 m internal conductor resistance on EX package communications systems, and white goods. The device package 1.2 m internal conductor resistance on LC package allows for easy implementation by the customer. Typical Economical low- and high-side current sensing applications include circuit protection, current monitoring, Output voltage proportional to AC or DC currents and motor and inverter control. 12.5 A and 25 A full-scale sensing ranges on LC package 15.5 A and 31 A full-scale sensing ranges on EX package The device consists of a linear Hall sensor circuit with a copper Overcurrent F A U L T trips and latches at 100% of full-scale conduction path located near the surface of the die. Applied current current flowing through this copper conduction path generates Low-noise analog signal path a magnetic field which is sensed by the integrated Hall IC 100 kHz bandwidth and converted into a proportional voltage. Device accuracy is Small footprint, low-profile SOIC8 and QFN packages optimized through the close proximity of the magnetic signal 3 to 5.5 V single supply operation to the Hall transducer. Integrated electrostatic shield for output stability Factory-trimmed for accuracy The output of the device has a positive slope proportional to Extremely stable output offset voltage the current flow from IP+ to IP (pins 1 and 2, to pins 3 and Zero magnetic hysteresis 4). The internal resistance of this conductive path is 0.6 m Ratiometric output from supply voltage for the EX package, and 1.2 m for the LC package, providing a non-intrusive measurement interface that saves power in PACKAGES: applications that require energy efficiency. The ACS711 is optimized for low-side current sensing applications, although the terminals of the conductive path are electrically isolated from the sensor IC leads, providing sufficient internal creepage and clearance dimensions for a low AC or DC working voltage applications. The thickness 12-contact QFN of the copper conductor allows survival of the device at up to 3 mm 3 mm 0.75 mm 8-pin SOICN (EX package) with internally fused path Continued on the next page (LC package) Not to scale Typical Application +3.3 V VCC C IP+ BYP Application 1. The ACS711 outputs 0.1 F IP+ an analog signal, V , that varies IOUT linearly with the bi-directional AC or VIOUT C DC primary current, I , within the P LOAD ACS711 I P range specified. The F A U L T pin trips R PU when I reaches 100% of its full- P scale current. FAULT IP IP GND ACS711A-DS, Rev. 4 June 23, 2017Hall-Effect Linear Current Sensor with ACS711 Overcurrent Fault Output for < 100 V Isolation Applications DESCRIPTION (CONTINUED) 5 overcurrent conditions. assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt The ACS711 is provided in small, surface-mount packages: SOIC8 from RoHS. The device is fully calibrated prior to shipment from and QFN12. The leadframe is plated with 100% matte tin, which the factory. is compatible with standard lead (Pb) free printed circuit board SELECTION GUIDE 2 Optimized Accuracy Sensitivity , T A 1 Part Number Range, I Sens (Typ) Package Packing P (C) (A) (mV/A) ACS711ELCTR-12AB-T 40 to 85 12.5 110 ACS711KLCTR-12AB-T 40 to 125 8-pin SOICN 3000 pieces/reel ACS711ELCTR-25AB-T 40 to 85 25 55 ACS711KLCTR-25AB-T 40 to 125 3 4 ACS711EEXLT-31AB-T 40 to 85 31 45 3 ACS711KEXLT-31AB-T 40 to 125 12-contact QFN with 1500 pieces/reel fused current loop 3 4 ACS711EEXLT-15AB-T 40 to 85 15.5 90 3 ACS711KEXLT-15AB-T 40 to 125 1 Contact Allegro for additional packing options. 2 Sensitivity measured with V = 3.3 V. CC 3 QFN package not qualified for automotive applications. 4 Variants ACS711EEXLT-15AB-T and ACS711EEXLT-31AB-T are Pre-End-of-Life. These device variants are approaching end of life. Within a minimum of 6 months, these device variants will enter their final, Last Time Buy, order phase. Date of status change: June 5, 2017. Suggested replacements include ACS711KEXLT-15AB-T and ACS711KEXLT-31AB-T, respectively. ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Units Supply Voltage V 7 V CC Reverse Supply Voltage V 0.1 V RCC Output Voltage V 7 V IOUT Reverse Output Voltage V 0.1 V RIOUT VAC peak Working Voltage for Basic Isolation V Voltage applied between pins 1-4 and 5-8 100 WORKING or VDC F A U L T Pin Voltage V 7 V FAULT Overcurrent Transient Tolerance I 1 pulse, 100 ms 100 A POC Range E 40 to 85 C Nominal Operating Ambient Temperature T A Range K 40 to 125 C Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com