ACS712_06 ALLEGRO [Allegro MicroSystems], ACS712_06 Datasheet

ACS712_06

Manufacturer Part Number

ACS712_06

Description

Fully Integrated, Hall Effect-Based Linear Current Sensor with 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor

Manufacturer

ALLEGRO [Allegro MicroSystems]

Datasheet

1.ACS712_06.pdf (12 pages)

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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

▪ Total output error 1.5% at T

▪ Small footprint, low-profile SOIC8 package

▪ 1.2 mΩ internal conductor resistance

▪ 2.1 kV

▪ 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

Package: 8 pin SOIC (suffix LC)

ACS712-DS, Rev.1

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

Approximate Scale 1:1

RMS

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

= 25°C, and 4% at –40°C to 85°C

Fully Integrated, Hall Effect-Based Linear Current Sensor

Application 1. The ACS712 outputs an analog signal, V

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

primary sensed current, I

is recommended for noise management, with values that

depend on the application.

Typical Application

IP+

IP–

ACS712

FILTER

VIOUT

GND

VCC

, within the range specified. C

Description

The Allegro

solutions for AC or DC current sensing in industrial, 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.

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 mΩ typical, providing low power

Continued on the next page…

1 nF

OUT

+5 V

0.1 μF

BYP

ACS712 provides economical and precise

OUT

ACS712

IOUT(Q)

)

Related parts for ACS712_06

ACS712_06 Summary of contents

Page 1

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 μs output rise ...

Page 2

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Description (continued) loss. The thickness of the copper conductor allows survival of the device 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from ...

Page 3

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor VCC (Pin 8) Hall Current Drive IP+ Sense Temperature (Pin 1) IP+ (Pin 2) IP− (Pin 3) IP− (Pin 4) Terminal List Table Number 1 and 2 3 and 4 ...

Page 4

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor COMMON OPERATING CHARACTERISTICS Characteristic Symbol ELECTRICAL CHARACTERISTICS Supply Voltage V CC Supply Current I CC Output Zener Clamp Voltage V Z Output Resistance R IOUT Output Capacitance Load C LOAD ...

Page 5

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor x05A PERFORMANCE CHARACTERISTICS Characteristic Symbol Optimized Accuracy Range I P Sens TA Sensitivity 2 Sens TOP Noise V NOISE(PP) Electrical Offset Voltage V OE Total Output Error 3 E TOT ...

Page 6

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Mean Supply Current versus Ambient Temperature 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 - 100 T (°C) A Magnetic Offset versus ...

Page 7

Page 8

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Definitions of Accuracy Characteristics Sensitivity (Sens). The change in sensor output in response change through the primary conductor. The sensitivity is the product of the magnetic ...

Page 9

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Definitions of Dynamic Response Characteristics Propagation delay (t ). The time required for the sensor PROP output to reflect a change in the primary current signal. Propaga- tion delay is ...

Page 10

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Chopper Stabilization Technique Chopper Stabilization is an innovative circuit technique that is used to minimize the offset voltage of a Hall element and an asso- ciated on-chip amplifier. Allegro patented ...

Page 11

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Improving Sensing System Accuracy Using the FILTER Pin In low-frequency sensing applications often advantageous to add a simple RC filter to the output of the sensor. Such a ...

Page 12

ACS712 2.1 kVRMS Voltage Isolation and a Low-Resistance Current Conductor Package LC, 8-pin SOIC Preliminary dimensions, for reference only Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only (reference JEDEC MS-012 AA) Dimensions exclusive of mold flash, ...

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