ACS723KMA

precise solution for AC or DC current sensing in industrial,

commercial, and communication systems. The small package

is ideal for space constrained applications while also saving

costs due to reduced board area. Typical applications include

motorcontrol,loaddetectionandmanagement,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

theintegratedHallICandconvertedintoaproportionalvoltage.

Deviceaccuracyisoptimizedthroughthecloseproximityofthe

magnetic field to the Hall transducer. A precise, proportional

voltage is provided by the low-offset, chopper-stabilized

BiCMOS Hall IC, which includes Allegro’s patented digital

temperature compensation, resulting in extremely accurate

performance over temperature. The output of the device has

a positive slope when an increasing current flows through the

primary copper conduction path (from pins 1 through 4, to pins

5 through 8), which is the path used for current sensing. The

internal resistance of this conductive path is 0.85 mΩ typical,

providing low power loss.

The terminals of the conductive path are electrically isolated

from the sensor leads (pins 9 through 16). This allows the

ACS723 current sensor IC to be used in high-side current sense

applicationswithouttheuseofhigh-sidedifferentialamplifiers

or other costly isolation techniques.

ACS723-DS

• Patented integrated digital temperature compensation

circuitry allows for near closed loop accuracy over

temperature in an open loop sensor

• UL60950-1 (ed. 2) certified

□ Dielectric Strength Voltage = 4.8 kVrms

□ Basic Isolation Working Voltage = 1097 Vrms

□ Reinforced Isolation Working Voltage = 565 Vrms

• Industry-leading noise performance with greatly improved

bandwidth through proprietary amplifier and filter

design techniques

• Pin-selectable band width: 80 kHz for high bandwidth

applications or 20 kHz for low noise performance

• 0.85 mΩ primary conductor resistance for low power loss

and high inrush current withstand capability

• Low-profile SOIC16 package suitable for space-

constrained applications

• 4.5 to 5.5 V, single supply operation

• Output voltage proportional to AC or DC current

• Factory-trimmed sensitivity and quiescent output voltage

for improved accuracy

High Accuracy, Hall-effect Based Current Sensor

IC in High Isolation SOIC16 Package

Continued on the next page…

Package: 16-pin SOICW (suffix MA)

Typical Application

1

5

2

6

3

7

4

8

+I

I

C

C

0.1 F

m

–I

IP+

IP+

IP+

IP+

IP–

IP–

IP–

IP–

P

P

L

BYPASS

P

NC

GND

NC

BW_SEL

VIOUT

NC

VCC

NC

9

10

11

12

13

14

15

16

ACS723

The ACS723 outputs an

changes, proportionally, with

the bidirectional AC or DC

within the specified measure-

ment range. The BW_SEL pin

can be used to select one of

the two bandwidths to opti-

mize the noise performance.

Grounding the BW_SEL pin

puts the part in the high

bandwidth (80 kHz) mode.

Continued on the next page…

Approximate Scale 1:1

FEATURES AND BENEFITS

DESCRIPTION

CB Certificate Number:

US-22339-A1-UL

TÜV America

Certificate Number:

U8V 14 11 54214 030

CB 14 11 54214 029

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