IP+

IP+

IP–

IP–

5

GND

2

4

1

3

ACS712

7

8

+5 V

VIOUT

V

OUT

6

FILTER

VCC

C

BYP

0.1 μF

C

F

1 nF

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

is recommended for noise management, with values that

depend on the application.

ACS712

Description

solutionsforACorDCcurrentsensinginindustrial, commercial,

and communications systems. The device package allows for

easy implementation by the customer. Typical applications

include motor control, load detection and management, switch-

mode power supplies, and overcurrent fault protection. The

device is not intended for automotive applications.

The device consists of a precise, low-offset, linear Hall circuit

with a copper conduction path located near the surface of 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 after packaging.

when an increasing current flows through the primary copper

conduction path (from pins 1 and 2, to pins 3 and 4), which is

the path used for current sampling. The internal resistance of

this conductive path is 1.2 mΩ typical, providing low power

loss. The thickness of the copper conductor allows survival of

ACS712-DS, Rev. 13

Features and Benefits

▪ Low-noise analog signal path

▪ Device bandwidth is set via the new FILTER pin

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

▪ 80 kHz bandwidth

▪ Small footprint, low-profile SOIC8 package

▪ 1.2 mΩ internal conductor resistance

▪ 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8

▪ 5.0 V, single supply operation

▪ 66 to 185 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

▪ Ratiometric output from supply voltage

Fully Integrated, Hall Effect-Based Linear Current Sensor IC

with 2.1 kVRMS Isolation and a Low-Resistance Current Conductor

Continued on the next page…

Approximate Scale 1:1

Package: 8 Lead SOIC (suffix LC)

Typical Application

TÜV America

Certificate Number:

U8V 06 05 54214 010