Fully Integrated, Hall Effect-Based Linear Current Sensor with

2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

ACS712

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Units

Supply Voltage

8V

Reverse Supply Voltage

–0.1

V

Output Voltage

8V

Reverse Output Voltage

–0.1

V

Reinforced Isolation Voltage

2100

V

Voltage applied to leadframe (Ip+ pins), based

on IEC 60950

184

Basic Isolation Voltage

1500

V

Voltage applied to leadframe (Ip+ pins), based

on IEC 60950

354

Output Current Source

3mA

Output Current Sink

10

mA

Overcurrent Transient Tolerance

1 pulse, 100 ms

100

A

Nominal Operating Ambient Temperature

Range E

–40 to 85

ºC

Maximum Junction Temperature

165

ºC

Storage Temperature

–65 to 170

ºC

Selection Guide

Part Number

Packing*

(°C)

(A)

Sensitivity, Sens

(Typ) (mV/A)

ACS712ELCTR-05B-T

Tape and reel, 3000 pieces/reel

–40 to 85

±5

185

ACS712ELCTR-20A-T

Tape and reel, 3000 pieces/reel

–40 to 85

±20

100

ACS712ELCTR-30A-T

Tape and reel, 3000 pieces/reel

–40 to 85

±30

66

*Contact Allegro for additional packing options.

loss. The thickness of the copper conductor allows survival of

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

the conductive path are electrically isolated from the sensor leads

(pins 5 through 8). This allows the ACS712 current sensor to be

used in applications requiring electrical isolation without the use

of opto-isolators or other costly isolation techniques.

TheACS712 is provided in a small, surface mount SOIC8 package.

The leadframe is plated with 100% matte tin, which is compatible

withstandardlead(Pb)freeprintedcircuitboardassemblyprocesses.

Internally,thedeviceisPb-free,exceptforflip-chiphigh-temperature

Pb-based solder balls, currently exempt from RoHS. The device is

fully calibrated prior to shipment from the factory.

Description (continued)

Parameter

Specification

Fire and Electric Shock

CAN/CSA-C22.2 No. 60950-1-03

UL 60950-1:2003

EN 60950-1:2001