ACS709LLF-6BB-T Allegro Microsystems Inc, ACS709LLF-6BB-T Datasheet

ACS709LLF-6BB-T

Manufacturer Part Number

ACS709LLF-6BB-T

Description

IC CURRENT SENSOR 24-QSOP

Manufacturer

Allegro Microsystems Inc

Datasheet

1.ACS709LLF-6BB-T.pdf (16 pages)

Specifications of ACS709LLF-6BB-T

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

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Features and Benefits

▪ Industry-leading noise performance with 120 kHz

▪ Integrated shield greatly reduces capacitive coupling

▪ Small footprint surface mount QSOP24 package

▪ 2100 V

▪ 1.1 mΩ primary conductor resistance for low power loss

▪ User-settable Overcurrent Fault level

▪ Overcurrent Fault signal typically responds to an

▪ Filter pin capacitor sets analog signal bandwidth

▪ ±2% typical output error

▪ 3 to 5.5 V, single supply operation

▪ Factory trimmed sensitivity, quiescent output voltage,

▪ Chopper stabilization results in extremely stable

▪ Ratiometric output from supply voltage

Package: 24 pin QSOP (suffix LF)

ACS709-DS, Rev. 2

Approximate Scale

bandwidth through proprietary amplifier and filter

design techniques

from current conductor to die due to high dV/dt, and

prevents offset drift in high-side applications

path and sensor IC electronics

overcurrent condition in < 2 μs

and associated temperature coefficients

quiescent output voltage

High Bandwidth, Fast Fault Response Current Sensor IC

RMS

isolation voltage between primary current

IP+

IP–

ACS709

FAULT_EN

FILTER

FAULT

VIOUT

VZCR

GND

VOC

VCC

Fault_EN

IOUT

1 nF

330 kΩ

Typical Application

0.1 μF

In Thermally Enhanced Package

Description

The Allegro

and precise means for current sensing applications in industrial,

automotive, commercial, and communications systems. The

device is offered in a small footprint surface mount package

that allows easy implementation in customer applications.

The ACS709 consists of a precision linear Hall sensor integrated

circuit with a copper conduction path located near the surface

of the silicon die. Applied current flows through the copper

conduction path, and the analog output voltage from the Hall

sensor IC linearly tracks the magnetic field generated by the

applied current. The accuracy of the ACS709 is maximized

with this patented packaging configuration because the Hall

element is situated in extremely close proximity to the current

to be measured.

High level immunity to current conductor dV/dt and stray

electric fields, offered by Allegro proprietary integrated shield

technology, guarantees low output ripple and low offset drift

in high-side applications.

The voltage on the Overcurrent Input (VOC pin) allows

customers to define an overcurrent fault threshold for the

device. When the current flowing through the copper conduction

path (between the IP+ and IP– pins) exceeds this threshold,

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, R

ACS709 current sensor IC provides economical

Sets resistor divider reference for V

Noise and bandwidth limiting filter capacitor

Fault delay setting capacitor, 22 nF maximum

Use of capacitor required

Use of resistor optional

ACS709

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