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