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