1

varies linearly with the uni- or bi-directional AC or DC primary

noise management, with values that depend on the application.

ACS756

Description

The Allegro ACS756 family of current sensor ICs provides

economical and precise solutions forAC or DC current sensing

in industrial, automotive, commercial, and communications

systems.The device package allows for easy implementation by

the customer. Typical applications include motor control, load

detection and management, power supplies, and overcurrent

fault protection.

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 voltage is provided by the low-offset,

chopper-stabilized BiCMOS Hall IC, which is programmed

for accuracy at the factory.

increasing current flows through the primary copper conduction

path (from terminal 4 to terminal 5), which is the path used

for current sampling. The internal resistance of this conductive

path is 130 μΩ typical, providing low power loss.

The thickness of the copper conductor allows survival of the

device at up to 5× overcurrent conditions. The terminals of the

ACS756-DS, Rev. 6

Features and Benefits

▪ Industry-leading noise performance through proprietary

amplifier and filter design techniques

▪ Small package size, with easy mounting capability

▪ Monolithic Hall IC for high reliability

▪ Ultra-low power loss:130 μΩ internal conductor resistance

pins 1-3 to pins 4-5

▪ 3.0 to 5.0 V, single supply operation

▪ 3 μs output rise time in response to step input current

▪ 20 or 40 mV/A output sensitivity

▪ Output voltage proportional to AC or DC currents

▪ Factory-trimmed for accuracy

▪ Extremely stable output offset voltage

▪ Nearly zero magnetic hysteresis

Fully Integrated, Hall Effect-Based Linear Current Sensor IC

with 3 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

Continued on the next page…

Package: 5 pin package (suffix PFF)

Typical Application

+5 V

0.1 μF

IP+

IP–

2

GND

4

5

ACS756

3

1

VIOUT

VCC

I

P

Additional leadforms available for qualifying volumes

TÜV America

Certificate Number:

U8V 09 05 54214 021