ACS759
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ACS759xCB Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V Features and Benefits ▪ Industry-leading noise performance through proprietary amplifier and filter design techniques ▪ Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high voltage applications ▪ Total output error improvement through gain and offset trim over temperature ▪ Small package size, with easy mounting capability ▪ Monolithic Hall IC for high reliability ▪ Ultra-low power loss: 100 μΩ internal conductor resistance ▪ Galvanic isolation allows use in economical, high-side current sensing in high voltage systems ▪ 3.0 to 3.6 V, single supply operation The Allegro™ ACS759 family of current sensor ICs provides economical and precise solutions for AC or DC current sensing. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection. 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 output voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy at the factory. Continued on the next page… pe d Ty ste te High level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology, guarantees low output voltage ripple and low offset drift in high-side, high voltage applications. The output of the device has a positive slope (>VCC / 2) when an increasing 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 μΩ typical, providing low power loss. The thickness of the copper conductor allows survival of the device at high overcurrent conditions. The terminals of the Continued on the next page… Additional leadforms available for qualifying volumes Application 1. The ACS759 outputs an analog signal, VOUT , that varies linearly with the bidirectional AC or DC primary current, IP , within the range specified. CF is for optimal noise management, with values that depend on the application. ACS759-DS

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V Features and Benefits (continued) ▪ 120 kHz typical bandwidth ▪ 3 μs output rise time in response to step input current ▪ Output voltage proportional to AC or DC currents ▪ Factory-trimmed for accuracy ▪ Extremely stable output offset voltage ▪ Nearly zero magnetic hysteresis Description (continued) conductive path are electrically isolated from the signal leads (pins 1 through 3). This allows the ACS759 family of sensor ICs to be used in...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V Absolute Maximum Ratings Characteristic Forward Supply Voltage Reverse Supply Voltage Forward Output Voltage Reverse Output Voltage Output Source Current Output Sink Current Maximum Junction Storage Temperature Nominal Operating Ambient Temperature Isolation Characteristics Characteristic Dielectric Strength Test Voltage* Agency type-tested for 60 seconds per UL standard 60950-1, 2nd Edition Working Voltage for Basic Isolation For basic (single)...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V Thermal Characteristics may require derating at maximum conditions Characteristic Package Thermal Resistance Test Conditions* Mounted on the Allegro evaluation board with 2800 mm2 (1400 mm2 on component side and 1400 mm2 on opposite side) of 4 oz. copper connected to the primary leadframe and with thermal vias connecting the copper layers. Performance is based on current flowing through the primary leadframe and includes the power consumed by the...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V Functional Block Diagram +3 to 3.6 V VCC Dynamic Offset Cancellation Gain Temperature Coefficient Offset Temperature Coefficient Terminal List Table Number Device power supply terminal Signal ground terminal Terminal for current being sampled Terminal for current being sampled Analog output signal Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V COMMON OPERATING CHARACTERISTICS1 valid at TOP = –40°C to 150°C and VCC = 3.3 V, unless otherwise specified Characteristic Test Conditions Supply Voltage Supply Current Output open Power-On Delay Rise Time2 Propagation Delay Response Time tPROP tRESPONSE IP step = 60% of IP+, 10% to 90% rise time, TA = 25°C, COUT = 0.47 nF TA = 25°C, COUT = 0.47 nF Output Load Resistance Output Load Capacitance Primary Conductor Resistance Symmetry2 Quiescent...

Thermally Enhanced, Fully Integrated, Hall Effect-Based Linear Current Sensor IC With 100 μΩ Current Conductor and Optimized Performance at 3.3 V TOP = –40°C to 150°C, VCC = 3.3 V, unless otherwise specified Min. Sens(TOP)HT Full scale of IP applied for 5 ms, TOP = 25°C to 150°C Sens(TOP)LT Full scale of IP applied for 5 ms,TOP = –40°C to 25°C Primary Sampled Current Test Conditions Full scale of IP applied for 5 ms, TA = 25°C Up to full scale of IP , IP applied for 5 ms ELIN VOE(TA) Electrical Offset Voltage3 Magnetic Offset Error Total Output Error4 Over full scale of IP , IP applied for...