Datasheet ACS715 (Allegro) - 2

ACS715 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™ ACS715 provides economical and precise • Device bandwidth is set via the FILTER pin solutions for DC current sensing in automotive systems. The • 5 µs output rise time in response to step input current device package allows for easy implementation by the customer. • 80 kHz bandwidth Typical applications include motor control, load detection and • Total output error 1.5% typical at TA = 25°C management, switch-mode power supplies, and overcurrent • Small footprint, low-profile SOIC8 package fault protection. • 1.2 mΩ internal conductor resistance The device consists of a precise, low-offset, linear Hall circuit • 2.1 kVRMS minimum isolation voltage from pins 1-4 to with a copper conduction path located near the surface of the pins 5-8 die. Applied current flowing through this copper conduction • 5.0 V, single supply operation path generates a magnetic field which the Hall IC converts into a • 133 to 185 mV/A output sensitivity proportional voltage. Device accuracy is optimized through the • Output voltage proportional to DC currents close proximity of the magnetic signal to the Hall transducer. • Factory-trimmed for accuracy A precise, proportional voltage is provided by the low-offset, • Extremely stable output offset voltage chopper-stabilized BiCMOS Hall IC, which is programmed • Nearly zero magnetic hysteresis for accuracy after packaging. • Ratiometric output from supply voltage • Operating temperature range, –40°C to 150°C The output of the device has a positive slope (>VIOUT(Q)) when an increasing current flows through the primary copper TÜV America Certificate Number: conduction path (from pins 1 and 2, to pins 3 and 4), which is U8V 15 05 54214 038 the path used for current sampling. The internal resistance of CB 13 06 54214 026 this conductive path is 1.2 mΩ typical, providing low power loss. The thickness of the copper conductor allows survival of
Package: 8-Pin SOIC (suffix LC)
the device at up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal Continued on the next page… Not to scale +5 V 1 8 IP+ VCC 2 7 V IP+ VIOUT OUT CBYP 0.1 µF IP ACS715 3 6 IP– FILTER 4 C IP– 5 F GND
Typical Application 1.
The ACS715 outputs an analog signal, VOUT . that varies linearly with the unidirectional DC primary sampled current, IP , within the range specified. CF is recommended for noise management, with values that depend on the application. ACS715-DS, Rev. 13 May 20, 2019 MCO-0000200