ACS714LLCTR-50A-T【PDF 1/18 页】SENSOR CURRENT 50A 5V BI 8SOIC

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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

Description

Low-noise analog signal path

Device bandwidth is set via the FILTER pin

5 μ s output rise time in response to step input current

80 kHz bandwidth

Total output error 1.5% typical, at T A = 25°C

Small footprint, low-profile SOIC8 package

1.2 m Ω 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

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 (>V IOUT(Q) )

when an increasing current flows through the primary copper

conduction path (from pins 1 and 2, to pins 3 and 4), which is

Package: 8 pin SOIC (suffix LC)

the path used for current sampling. The internal resistance of

this conductive path is 1.2 m Ω 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…

Approximate Scale 1:1

Typical Application

+5 V

IP+

VCC

IP+ VIOUT

V OUT

C BYP

0.1 μF

I P

ACS714

IP– FILTER

IP–

GND

C F

1 nF

Application 1. The ACS714 outputs an analog signal, V OUT .

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

primary sampled current, I P , within the range specified. C F

is recommended for noise management, with values that

depend on the application.

ACS714-DS, Rev. 9

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