NEX ROBOTICS ACS714 Quick Start Manual

ACS714 5Amp Hall Effect Current Sensor Module

Introduction:

The ACS714 5Amp current sensor provides economical and precise solutions for AC or DC
current sensing in robotics and automotive applications. Typical applications include motor
control, load detection and management, switch-mode power supplies, and over current fault
protection. The device consists of a precise, low-offset, linear Hall circuit with a copper
conduction path located near the surface of the die. Applied current flowing through this
copper conduction path generates a magnetic field which the Hall IC converts into a
proportional voltage. The output of the device has a positive slope (>VIOUT(Q)) 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 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× over current conditions. The terminals of
the conductive path are electrically isolated from the signal leads (pins 5 through 8). This
allows the ACS714 to be used in applications requiring electrical isolation without the use of
opto-isolators or other costly isolation techniques.

Specification

• Single 5V supply operation.
• Optimized Input range (IP) : +/- 30Amp
• Sensitivity : 185mV/Amp
• Low noise analog signal path,
• Stable output offset voltage
• Bandwidth is set via a filter capacitor
• 1.2mOhm internal copper conductor resistance
• 2.1kVRMS minimum isolation voltage
• Ratio metric output is possible from supply voltage
NEX Robotics Pvt. Ltd.
www.nex-robotics.com
ACS714 5 Amp Hall Effect Current Sensor Module
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