ACS710 120 kHz Bandwidth, High Voltage Isolation Current Sensor with Integrated Overcurrent Detection Features and Benefits Description Industry-leading noise performance with greatly improved The Allegro ACS710 current sensor provides economical bandwidth through proprietary amplifier and filter design and precise means for current sensing applications in industrial, techniques commercial, and communications systems. The device is offered Small footprint package suitable for space-constrained in a small footprint surface mount package that allows easy applications implementation in customer applications. 1 m primary conductor resistance for low power loss The ACS710 consists of a precision linear Hall sensor integrated High isolation voltage, suitable for line-powered circuit with a copper conduction path located near the surface applications of the silicon die. Applied current flows through the copper User-adjustable Overcurrent Fault level conduction path, and the analog output voltage from the Hall Overcurrent Fault signal typically responds to an sensor linearly tracks the magnetic field generated by the overcurrent condition in < 2 s applied current. The accuracy of the ACS710 is maximized Integrated shield virtually eliminates capacitive coupling with this patented packaging configuration because the Hall from current conductor to die due to high dV/dt voltage element is situated in extremely close proximity to the current transients to be measured. Filter pin capacitor improves resolution in low bandwidth applications High level immunity to current conductor dV/dt and stray 3 to 5.5 V, single supply operation electric fields, offered by Allegro proprietary integrated shield Factory trimmed sensitivity and quiescent output voltage technology, results in low ripple on the output and low offset Chopper stabilization results in extremely stable quiescent drift in high-side, high voltage applications. output voltage The voltage on the Overcurrent Input (VOC pin) allows Ratiometric output from supply voltage customers to define an overcurrent fault threshold for the device. When the current flowing through the copper conduction path (between the IP+ and IP pins) exceeds this threshold, the open Package: 16-pin SOIC Hall Effect IC drain Overcurrent Fault pin will transition to a logic low state. Factory programming of the linear Hall sensor inside of the Package (suffix LA) ACS710 results in exceptional accuracy in both analog and digital output signals. The internal resistance of the copper path used for current sensing is typically 1 m, for low power loss. Also, the current conduction path is electrically isolated from the low voltage Approximate Scale 1:1 Continued on the next page Typical Application Circuit V CC Fault EN R 1 16 H IP+ FAULT EN R , R Sets resistor divider reference for V 2 15 H L OC IP+ VOC ACS710 C Noise and bandwidth limiting filter capacitor 3 14 R F L IP+ VCC R 4 13 C Fault delay setting capacitor, 22 nF maximum PU OC IP+ FAULT I P C 5 12 OC 0.1 F B A Use of capacitor required IP VIOUT V 6 11 IOUT Use of resistor optional, 330 k recommended. IP FILTER 7 10 B If used, resistor must be connected between C F IP VZCR F A U L T pin and V . CC 8 9 1 nF IP GND A ACS710-DS, Rev. 9120 kHz Bandwidth, High Voltage Isolation ACS710 Current Sensor with Integrated Overcurrent Detection Description (continued) Pb-based solder balls, currently exempt from RoHS. The device is sensor inputs and outputs. This allows the ACS710 family of sensors fully calibrated prior to shipment from the factory. to be used in applications requiring electrical isolation, without the use of opto-isolators or other costly isolation techniques. Applications include: The ACS710 is provided in a small, surface mount SOIC16 package. The leadframe is plated with 100% matte tin, which is compatible Motor control and protection Load management and overcurrent detection with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Power conversion and battery monitoring / UPS systems Selection Guide Sens (typ) I Latched T P A 1 Part Number at V = 5 V Packing CC (A) Fault (C) (mV/A) 2,3 ACS710KLATR-6BB-T 6 151 2 ACS710KLATR-10BB-T 10 85 Yes 40 to 125 Tape and Reel, 1000 pieces per reel 2 ACS710KLATR-12CB-T 12.5 56 2 ACS710KLATR-25CB-T 25 28 2,3 ACS710KLATR-6BB-NL-T 6 151 2 ACS710KLATR-10BB-NL-T 10 85 No 40 to 125 Tape and Reel, 1000 pieces per reel 2 ACS710KLATR-12CB-NL-T 12.5 56 2 ACS710KLATR-25CB-NL-T 25 28 1 Contact Allegro for packing options. 2 Variant not intended for automotive applications. 3 The formerly offered V = 3.3 V version of the I = 6 A variant (formerly the ACS710KLATR-6BB-T) is now offered as the ACS716KLATR- CC P 6BB-T. For additional information, please refer to the ACS716 datasheet. Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com