Product Overview

The ACS720 is a high-accuracy, Hall-effect-based current sensor IC designed for industrial and consumer applications, particularly in motor control and power inverter stages. It offers high isolation with a reduced bill of materials thanks to its proprietary SOIC16W package. Operating from a single 5V supply, it provides a 0-3V output swing with a stable 1.5V zero-current output, compatible with 3.3V ADCs. Its high PSRR effectively rejects noise in demanding environments. The ACS720 features dual, user-configurable fault functions (fast and slow) for short-circuit and overcurrent detection, with fault levels set via an external resistor divider. Differential current sensing rejects external magnetic fields, simplifying board layout in 3-phase motor applications. This sensor boasts integrated digital temperature compensation for high accuracy over temperature and a low 1.0 m primary conductor resistance for minimal power loss.

Product Attributes

• Brand: Allegro MicroSystems
• Package: SOIC16 Wide-Body (LA)
• Certifications: UL60950-1 (3600 Vrms Dielectric Strength certified)
• Material: Leadframe plated with 100% matte tin; internally Pb-free (except for flip-chip high-temperature Pb-based solder balls).
• RoHS Status: Internally Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS.

Technical Specifications

Key Features & Benefits

• High accuracy Hall-effect-based current sensor.
• Proprietary SOIC16W package for high isolation and reduced BOM.
• Single 5V supply operation.
• 0-3V output voltage swing, compatible with 3.3V ADCs.
• High PSRR for excellent noise rejection in noisy environments.
• Dual, user-configurable fast and slow fault outputs for overcurrent and short-circuit detection.
• Differential current sensing rejects external magnetic fields, simplifying layout.
• Integrated digital temperature compensation for high accuracy over temperature.
• Low 1.0 m primary conductor resistance for reduced power loss.
• Small footprint, low-profile SOIC16 package.
• Integrated shield minimizes capacitive coupling from high dV/dt transients.
• Output voltage proportional to AC or DC current.
• Factory-trimmed sensitivity and quiescent output voltage for improved accuracy.
• 3600 Vrms dielectric strength certified under UL60950-1.

Application Scenarios

• Motor Control
• Power Inverter Stage Applications
• Industrial Applications
• Consumer Applications
• Three-Phase Motor Applications
• Single-Phase Applications