ACS715LLCTR-20A-T【PDF 1/14 页】SENSOR CURRENT 20A 5V UNI 8-SOIC

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ACS715

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

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

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

The Allegro ? ACS715 provides economical and precise

solutions for 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.

TüV America

Certificate Number:

U8V 06 05 54214 010

Package: 8 Lead SOIC (suffix LC)

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

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+

I P

VCC

IP+ VIOUT

ACS715

IP– FILTER

IP–

GND

V OUT

C F

C BYP

0.1 μF

Application 1. The ACS715 outputs an analog signal, V OUT .

that varies linearly with the unidirectional DC primary sampled

current, I P , within the range specified. C F is recommended for

noise management, with values that depend on the application.

ACS715-DS, Rev. 9

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