ACS756xCB Fully Integrated, Hall Effect-Based Linear Current Sensor IC with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor FEATURES AND BENEFITS DESCRIPTION Industry-leading noise performance through proprietary The Allegro ACS756 family of current sensor ICs provides amplifier and filter design techniques economical and precise solutions for AC or DC current sensing Total output error 0.8% at T = 25C in industrial, automotive, commercial, and communications A Small package size, with easy mounting capability systems. The device package allows for easy implementation by Monolithic Hall IC for high reliability the customer. Typical applications include motor control, load Ultra-low power loss: 100 internal conductor resistance detection and management, power supplies, and overcurrent 3 kV minimum isolation voltage from fault protection. RMS pins 1-3 to pins 4-5 The device consists of a precision, low-offset linear Hall 3.0 to 5.0 V, single supply operation circuit with a copper conduction path located near the die. 3 s output rise time in response to step input current Applied current flowing through this copper conduction path 20 or 40 mV/A output sensitivity generates a magnetic field which the Hall IC converts into a Output voltage proportional to AC or DC currents proportional voltage. Device accuracy is optimized through the Factory-trimmed for accuracy close proximity of the magnetic signal to the Hall transducer. Extremely stable output offset voltage A precise, proportional voltage is provided by the low-offset, Nearly zero magnetic hysteresis chopper-stabilized BiCMOS Hall IC, which is programmed TV America for accuracy at the factory. UL Certified File Certificate Number: No.: E316429 U8V 14 05 54214 028 The output of the device has a positive slope (>V / 2) when an CC increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used PACKAGE: for current sampling. The internal resistance of this conductive 5-Pin CB Package (suffix PFF) path is 100 typical, 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 signal leads 1 Continued on the next page Additional leadforms available for qualifying volumes +5 V 1 4 VCC IP+ C BYP ACS756 0.1 F 2 I GND P C F 5 IP 3 VIOUT V OUT R F Typical Application The ACS756 outputs an analog signal (V ) that varies linearly with the uni- or bi-directional AC or DC primary sampled current, I , OUT P within the range specified. C is for optimal noise management, with values that depend on the application. F ACS756xCB-DS, Rev. 2Fully Integrated, Hall Effect-Based Linear Current Sensor IC ACS756xCB with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Description (continued) (pins 1 through 3). This allows the ACS756 family of sensor ICs to The device is fully calibrated prior to shipment from the factory. be used in applications requiring electrical isolation without the use The ACS75x family is lead (Pb) free. All leads are plated with 100% of opto-isolators or other costly isolation techniques. matte tin, and there is no Pb inside the package. The heavy gauge leadframe is made of oxygen-free copper. Selection Guide Primary Sampled Cur- T 1 OP 2 Part Number rent , I Packing P (C) (A) 3 ACS756SCA-050B-PFF-T 20 to 85 50 ACS756SCB-050B-PFF-T 20 to 85 50 3 ACS756SCA-100B-PFF-T 20 to 85 100 34 per tube ACS756SCB-100B-PFF-T 20 to 85 100 3 ACS756KCA-050B-PFF-T 40 to 125 50 ACS756KCB-050B-PFF-T 40 to 125 50 1 Additional leadform options available for qualified volumes 2 Contact Allegro for additional packing options. 3 Not for new design. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. SPECIFICATIONS Absolute Maximum Ratings Characteristic Symbol Notes Rating Units Forward Supply Voltage V 8 V CC Reverse Supply Voltage V 0.5 V RCC Forward Output Voltage V 28 V IOUT Reverse Output Voltage V 0.5 V RIOUT Voltage applied between pins 1-3 and 4-5 tested at 3000 Working Voltage for Reinforced Isolation V VAC for 1 minute according to 353 VDC / V WORKING-R pk UL standard 60950-1 Voltage applied between pins 1-3 and 4-5 tested at 3000 Working Voltage for Basic Isolation V VAC for 1 minute according to 500 VDC / V WORKING-B pk UL standard 60950-1 Output Source Current I VIOUT to GND 3 mA OUT(Source) Output Sink Current I VCC to VIOUT 1 mA OUT(Sink) Range K 40 to 125 C Nominal Operating Ambient Temperature T OP Range S 20 to 85 C Maximum Junction T (max) 165 C J Storage Temperature T 65 to 165 C stg Allegro MicroSystems, LLC 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com