Datasheet ACS714 (Allegro) - 2

ACS714 Automotive Grade, Fully Integrated, Hall-Effect-Based Linear Current Sensor IC with 2.1 kVRMS Voltage Isolation and Low-Resistance Current Conductor Features and Benefits Description
▪ Low-noise analog signal path The Allegro™ ACS714 provides economical and precise ▪ Device bandwidth is set via the FILTER pin solutions for AC or DC current sensing in automotive systems. ▪ 5 µs output rise time in response to step input current The device package allows for easy implementation by the ▪ 80 kHz bandwidth customer. Typical applications include motor control, load ▪ Total output error 1.5% typical, at TA = 25°C detection and management, switch-mode power supplies, and ▪ Small footprint, low-profile SOIC8 package overcurrent fault protection. ▪ 1.2 mΩ internal conductor resistance ▪ 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8 The device consists of a precise, low-offset, linear Hall circuit ▪ 5.0 V, single supply operation with a copper conduction path located near the surface of the ▪ 66 to 185 mV/A output sensitivity die. Applied current flowing through this copper conduction ▪ Output voltage proportional to AC or DC currents path generates a magnetic field which the Hall IC converts into a ▪ Factory-trimmed for accuracy ▪ Extremely stable output offset voltage proportional voltage. Device accuracy is optimized through the ▪ Nearly zero magnetic hysteresis close proximity of the magnetic signal to the Hall transducer. ▪ Ratiometric output from supply voltage A precise, proportional voltage is provided by the low-offset, ▪ Operating temperature range, –40°C to 150°C chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging. TÜV America Certificate Number: The output of the device has a positive slope (>VIOUT(Q)) U8V 15 05 54214 038 CB 13 06 54214 026 when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sampling. The internal resistance of
Package: 8-pin SOIC (suffix LC)
this conductive path is 1.2 mΩ 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 Continued on the next page… Not to scale
Typical Application
+5 V 1 8 IP+ VCC 2 7 V IP+ VIOUT OUT CBYP 0.1 µF IP ACS714 3 6 IP– FILTER C 4 F IP– 5 1 nF GND Application 1. The ACS714 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 recommended for noise management, with values that depend on the application. ACS714-DS, Rev. 12 May 17, 2019 MCO-0000199