Approximate Scale 1:1

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,automotive,

commercial, and communications systems. The device

package allows for easy implementation by the customer.

Typical applications include motor control, load detection and

management, switched-mode power supplies, and overcurrent

fault protection.

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

sensor 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 is sensed

by the integrated Hall IC and converted 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 sensing. The internal resistance of

this conductive path is 1.2 mΩ typical, providing low power

ACS712-DS

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

▪ 50 kHz bandwidth

▪ Small footprint, low-profile SOIC8 package

▪ 1.2 mΩ internal conductor resistance

▪ 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

with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

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Package: 8 pin SOIC (suffix LC)

Typical Application

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