ACS714LLCTR-30A-T データシートの表示（PDF） - Allegro MicroSystems

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ACS714LLCTR-30A-T

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

Allegro MicroSystems 

ACS714

Automotive Grade, Fully Integrated, Hall Effect-Based Linear Current Sensor IC

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 FILTER pin

▪ 5 µs output rise time in response to step input current

▪ 80 kHz bandwidth

▪ Total output error 1.5% typical, at TA = 25°C

▪ Small footprint, low-profile SOIC8 package

▪ 1.2 mΩ internal conductor resistance

▪ 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8

▪ 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

▪ Operating temperature range, –40°C to 150°C

TÜV America

Certificate Number:

U8V 06 05 54214 010

Package: 8 pin SOIC (suffix LC)

Approximate Scale 1:1

Description

The Allegro™ ACS714 provides economical and precise

solutions for AC or DC current sensing in automotive systems.

The device package allows for easy implementation by the

customer. Typical applications include motor control, load

detection and management, switch-mode power supplies, and

overcurrent fault protection.

The device consists of a precise, low-offset, linear Hall 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 the Hall IC converts 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 (>VIOUT(Q))

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 sampling. The internal resistance of

this conductive path is 1.2 mΩ typical, providing low power

loss. The thickness of the copper conductor allows survival of

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

Continued on the next page…

Typical Application

ACS714-DS, Rev. 10

1 IP+

8

VCC

2 IP+ VIOUT 7

IP

ACS714

3 IP– FILTER 6

4 IP– GND 5

+5 V

VOUT

CBYP

0.1 µF

CF

1 nF

Application 1. The ACS714 outputs an analog signal, VOUT .

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

primary sampled current, IP , within the range specified. CF

is recommended for noise management, with values that

depend on the application.

June 5, 2017

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