Datasheet > ACS720KLATR-80AB-T-4

ACS720KLATR-80AB-T-4

更新时间： 2024-01-24 17:09:07

品牌	Logo	应用领域
急速微 - ALLEGRO		/
页数	文件大小	规格书
35页	1760K
描述
High Accuracy, Dual Fault, Galvanically Isolated Current Sensor in SOIC16 Wide-Body Package

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ACS720

High Accuracy, Dual Fault, Galvanically Isolated

Current Sensor in SOIC16 Wide-Body Package

FEATURES AND BENEFITS

DESCRIPTION

• Differential current sensing cancels common mode fields,

simplifying PCB layout

• Two user-settable faults for fast short-circuit protection

and slower overcurrent detection

The ACS720 is a high accuracy Hall-effect-based current

sensor IC with multiple programmable fault levels intended

for industrial and consumer applications with a focus on motor

control and power inverter stage applications.

• Industry-leading noise performance with greatly improved

bandwidth through proprietary amplifier and filter design

techniques

• Patented integrated digital temperature compensation

circuitry allows high accuracy over temperature in an

open loop sensor

•ꢀ 1.0ꢀmΩꢀprimaryꢀconductorꢀresistanceꢀforꢀlowꢀpowerꢀlossꢀ

and high inrush current-withstanding capability

• Small footprint, low-profile SOIC16 package suitable for

space-constrained applications

• Integrated shield virtually eliminates capacitive coupling

from current conductor to die due to high dV/dt voltage

transients

• 5 V single supply operation with 0-3 V output swing

• Output voltage proportional to AC or DC current

• Factory-trimmed sensitivity and quiescent output voltage

for improved accuracy

• 3600 Vrms Dielectric Strength certified under UL60950-1

• High PSRR for noisy environments

One of the key benefits of the ACS720 is to provide high

isolation with a reduced bill of materials made possible by

the proprietary IC SOIC16W package. The ACS720 works

off of a single 5 V supply while maintaining an output voltage

swing from 0 to 3 V, with a stable zero current output of 1.5 V.

This allows the ACS720 to operate off of a 5 V supply while

having an output which is compatible with typical 3.3VADCs

foundonmanyMCUs.Furthermore,theACS720’shighPSRR

rejects the noise often found on the supplies in the power

section of the PCB or system, maintaining high accuracy in

noisy environments.

The device has dual fault functions that are user configurable.

Fastandslowfaultoutputallowforshort-circuitandovercurrent

fault detection. Auser-created resistor divider from the power

supply of the ACS720 is used to set the fault level. The fault

outputs are open drain, allowing the user to pull them up to

a compatible voltage for the MCU. The open-drain outputs

also allow for implementing a simple logical OR of multiple

sensor fault outputs.

PACKAGE:

TheACS720alsointegratesdifferentialcurrentsensing,which

rejects external magnetic fields, greatly simplifying board

layout in 3-phase motor applications.

16-Pin SOICW

(suffix LA)

CB Certiﬁcate Number:

US-23711-A2-UL

Not to scale

Continued on the next page…

VCC

VOC_F

VOC_S

DIGITAL SYSTEM

FAULT_F

Voltage

Reference

ADC

EEPROM &

Control Logic

Temp.

Sensor

To All

Subcircuits

Fault

Setpoint

Control

DAC

Programming

Control

Fast Fault

Hall

Driver

FAULT_S

Fault Filter

Logic

IP+

Slow Fault

Sensitivity

Control

Offset

Control

DAC

Dynamic Offset

Cancellation

R_F(INT)

Analog

Filters

VIOUT

IP–

GND

FILTER

Figure 1: Functional Block Diagram

ACS720-DS, Rev. 8

MCO-0000183

December 7, 2018

12 3 4 5 6 7...35

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