Datasheet ACS756xCB (Allegro)

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 TA = 25°C in industrial, automotive, commercial, and communications • 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 µΩ internal conductor resistance detection and management, power supplies, and overcurrent • 3 kVRMS minimum isolation voltage from fault protection. 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 µs 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 TÜV America for accuracy at the factory. Certificate Number: UL Certified File U8V 15 05 54214 037 No.: US-29755-UL 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
PACKAGE: 5-pin package (suffix CB)
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 up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads
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Leadform Leadform
+5 V 4 1 IP+ VCC CBYP ACS756 0.1 µF 2 IP GND CF 5 IP– 3 VIOUT VOUT RF
Typical Application The ACS756 outputs an analog signal (VOUT ) that varies linearly with the uni- or bi-directional AC or DC primary sampled current, IP , within the range specified. CF is for optimal noise management, with values that depend on the application.
ACS756xCB-DS, Rev. 8 February 3, 2020 MCO-0000202