DESCRIPTION
The Allegro™ ACS773 family of current sensor ICs provide
economical and precise solutions for AC or DC current sensing,
ideal for motor control, load detection and management, power
supply and DC-to-DC converter control, and inverter control.
The 2.5 μs response time enables overcurrent fault detection
in safety-critical applications.
The device consists of a precision, low-offset linear Hall
circuit with a copper conduction path located near the die.
Applied current flowing through this copper conduction path
generates a magnetic field which the Hall IC converts into a
proportional voltage. Device accuracy is optimized through the
close proximity of the magnetic signal to the Hall transducer.
A precise, proportional output voltage is provided by the
low-offset, chopper-stabilized BiCMOS Hall IC, which is
programmed for accuracy at the factory. Proprietary digital
temperature compensation technology greatly improves the
IC accuracy and temperature stability.
High-level immunity to current conductor dV/dt and stray
electric fields is offered by Allegro proprietary integrated shield
technology for low output voltage ripple and low offset drift
in high-side, high-voltage applications.

FEATURES AND BENEFITS
• AEC-Q100 Grade 1 qualified
• Typical of 2.5 μs output response time
• 3.3 V supply operation
• Ultra-low power loss: 100 μΩ internal conductor resistance
• Reinforced galvanic isolation allows use in economical,
high-side current sensing in high-voltage systems
• 4800 Vrms dielectric strength certified under UL60950-1
• Industry-leading noise performance with greatly
improved bandwidth through proprietary amplifier and
filter design techniques
• Integrated shield greatly reduces capacitive coupling
from current conductor to die due to high dV/dt signals,
and prevents offset drift in high-side, high-voltage
applications
• Greatly improved total output error through digitally
programmed and compensated gain and offset over the
full operating temperature range
• Small package size, with easy mounting capability
• Monolithic Hall IC for high reliability
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable output offset voltage