ALLEGRO ACS713 User Manual

ACS713

Fully Integrated, Hall Effect-Based Linear Current Sensor

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

Features and Benefits

 Low-noise analog signal path
 Device bandwidth is set via the new FILTER pin
 5 s output rise time in response to step input current
 80 kHz bandwidth
 Total output error 1.5% at T

= 25°C

A

 Small footprint, low-profile SOIC8 package
 1.2 m internal conductor resistance
 2.1 kV

minimum isolation voltage from pins 1-4 to pins 5-8

RMS

 5.0 V, single supply operation
 133 to 185 mV/A output sensitivity
 Output voltage proportional to DC currents
 Factory-trimmed for accuracy
 Extremely stable output offset voltage
 Nearly zero magnetic hysteresis
 Ratiometric output from supply voltage

TÜV America
Certificate Number:
U8V 06 05 54214 010

Package: 8 Lead SOIC (suffix LC)

Description

The Allegro® ACS713 provides economical and precise
solutions for DC current sensing in industrial, 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.

The output of the device has a positive slope (>V
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 m typical, providing low power
loss. The thickness of the copper conductor allows survival

IOUT(Q)

)

Approximate Scale 1:1

Continued on the next page…

Typical Application

+5 V

V

OUT

C

F

OUT

C

BYP

0.1 μF

.

1

IP+

2

IP+

I

P

Application 1. The ACS713 outputs an analog signal, V
that varies linearly with the unidirectional DC primary sensed
current, I
noise management, with values that depend on the application.

, within the range specified. CF is recommended for

P

3

4

ACS713

IP–

IP–

FILTER

VCC

VIOUT

GND

8

7

6

5

ACS713-DS, Rev. 4

ACS713

Fully Integrated, Hall Effect-Based Linear Current Sensor with

2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

Description (continued)

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 ACS713 current sensor to be

used in applications requiring electrical isolation without the use

of opto-isolators or other costly isolation techniques.

The ACS713 is provided in a small, surface mount SOIC8 package.

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

with standard lead (Pb) free printed circuit board assembly processes.

Internally, the device is Pb-free, except for flip-chip high-temperature

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

fully calibrated prior to shipment from the factory.

Selection Guide

Part Number Packing*

ACS713ELCTR-20A-T Tape and reel, 3000 pieces/reel –40 to 85 0 to 20 185

ACS713ELCTR-30A-T Tape and reel, 3000 pieces/reel –40 to 85 0 to 30 133

*Contact Allegro for additional packing options.

TA

(°C)

Optimized Range, I

(A)

Sensitivity, Sens

P

(Typ) (mV/A)

Absolute Maximum Ratings

Characteristic Symbol Notes Rating Units

Supply Voltage V

Reverse Supply Voltage V

Output Voltage V

Reverse Output Voltage V

Reinforced Isolation Voltage V

Basic Isolation Voltage V

Output Current Source I

Output Current Sink I

Overcurrent Transient Tolerance I

Nominal Operating Ambient Temperature T

Maximum Junction Temperature T

Storage Temperature T

ISO(bsc)

OUT(Source)

OUT(Sink)

J

CC

RCC

IOUT

RIOUT

Pins 1-4 and 5-8; 60 Hz, 1 minute, TA=25°C 2100 V

ISO

P

A

(max) 165 ºC

stg

Voltage applied to leadframe (Ip+ pins), based
on IEC 60950

Pins 1-4 and 5-8; 60 Hz, 1 minute, TA=25°C 1500 V

Voltage applied to leadframe (Ip+ pins), based
on IEC 60950

1 pulse, 100 ms 100 A

Range E –40 to 85 ºC

8V

–0.1 V

8V

–0.1 V

184 V

354 V

3mA

10 mA

–65 to 170 ºC

peak

peak

Parameter Specification

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

Fire and Electric Shock

UL 60950-1:2003

EN 60950-1:2001

Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com

2

ACS713

Fully Integrated, Hall Effect-Based Linear Current Sensor with

2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

Functional Block Diagram

IP+

(Pin 1)

IP+

(Pin 2)

IP–

(Pin 3)

IP–

(Pin 4)

VCC

(Pin 8)

Hall Current

Drive

Sense Temperature

Coefficient Trim

Cancellation

Dynamic Offset

Sense

Trim

GND

(Pin 5)

Signal

Recovery

0 Ampere

Offset Adjust

FILTER

(Pin 6)

VIOUT
(Pin 7)

+5 V

Pin-out Diagram

IP+

IP+

IP–

IP–

1

2

3

4

8

7

6

5

VCC

VIOUT

FILTER

GND

Terminal List Table

Number Name Description

1 and 2 IP+ Input terminals for current being sensed; fused internally

3 and 4 IP– Output terminals for current being sensed; fused internally

5 GND Signal ground terminal

6 FILTER Terminal for external capacitor that sets bandwidth

7 VIOUT Analog output signal

8 VCC Device power supply terminal

Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com

3

ACS713

Fully Integrated, Hall Effect-Based Linear Current Sensor with

2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

COMMON OPERATING CHARACTERISTICS

1

over full range of TA, and VCC = 5 V, unless otherwise specified

Characteristic Symbol Test Conditions Min. Typ. Max. Units

ELECTRICAL CHARACTERISTICS

Supply Voltage V
Supply Current I
Output Capacitance Load C
Output Resistive Load R
Primary Conductor Resistance R
Rise Time t
Frequency Bandwidth f –3 dB, T
Nonlinearity E
Symmetry E

Zero Current Output Voltage V

Power-On Time t

Magnetic Coupling
Internal Filter Resistance

1

Device may be operated at higher primary current levels, IP, and ambient, TA , and internal leadframe temperatures, TA , provided that the Maximum

2

3

CC

CC

LOAD

LOAD

PRIMARYTA

r

LIN

SYM

IOUT(Q)

PO

R

F(INT)

VCC = 5.0 V, output open – 10 13 mA
VIOUT to GND – – 10 nF
VIOUT to GND 4.7 – – k

= 25°C – 1.2 – m

IP = IP(max), TA = 25°C, C

= 25°C; IP is 10 A peak-to-peak – 80 – kHz

A

= 10 nF – 5 – s

OUT

Over full range of IP , IP applied for 5 ms – ±1.5 – %
Over full range of IP , IP applied for 5 ms 98 100 102 %

Unidirectional; IP = 0 A, TA = 25°C –

Output reaches 90% of steady-state level, no capacitor on
FILTER pin; TJ = 25; 20 A present on leadframe

4.5 5.0 5.5 V

VCC ×

0.1

–V

–35–s

– 12 – G/A

1.7 k

Junction Temperature, TJ(max), is not exceeded.

2

1G = 0.1 mT.

3

R

F(INT)

forms an RC circuit via the FILTER pin.

COMMON THERMAL CHARACTERISTICS

1

Min. Typ. Max. Units

Operating Internal Leadframe Temperature TAE range –40 – 85 °C

Value Units

Junction-to-Lead Thermal Resistance

Junction-to-Ambient Thermal Resistance

1

Additional thermal information is available on the Allegro website.

2

The Allegro evaluation board has 1500 mm2 of 2 oz. copper on each side, connected to pins 1 and 2, and to pins 3 and 4, with thermal vias connect-

2

2,3

R

Mounted on the Allegro ASEK 713 evaluation board 5 °C/W

JL

Mounted on the Allegro 85-0322 evaluation board, includes the power

R

JA

consumed by the board

23 °C/W

ing the layers. Performance values include the power consumed by the PCB. Further details on the board are available from the Frequently Asked
Questions document on our website. Further information about board design and thermal performance also can be found in the Applications Informa­tion section of this datasheet.

3

R

values shown in this table are typical values, measured on the Allegro evaluation board. The actual thermal performance depends on the actual

JA

application board design, the airflow in the application, and thermal interactions between the sensor and surrounding components through the PCB and
the ambient air. To improve thermal performance, see our applications material on the Allegro website.

Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com

4