Texas Instruments INA223 Handleiding

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R

SHUNT

Attenuator

Load

Two-Wire

Interface

GND

INA223

C

BYPASS

0.1Fm

V(Supply Voltage)

S

Power Supply

(0V to 26V)

R

4.7k

PULLUP

W

V

IN-

V

IN+

V

OUT

SCL

SDA

A0

INA223

www.ti.com

SBOS528–JUNE2012

AnalogOutputCurrentShuntandVoltage

InstantaneousPowerMonitor

CheckforSamples:INA223

1

FEATURES

DESCRIPTION

TheINA223isavoltage-outputdevicethatmonitors

23

•WideCommon-ModeRange:0Vto26V

thecurrent,busvoltage,andpowerofasupplyline

•±100µVOffset(Max,Gain=300V/V)

bysensingavoltagedropacrossashuntatcommon-

•Accuracy

modevoltagesfrom0Vto26V.Thecommon-mode

voltagerangeisindependentofthesupplyvoltage.

–±0.25%ShuntVoltageGainError(Max)

ThelowoffsetoftheZerø-Driftarchitectureenables

–±0.15%BusVoltageGainError(Max)

currentsensingwithmaximumdropsacrossthe

–1.25%PowerError(Max)

shuntaslowas10mV,full-scale.

–0.3μV/°COffsetDrift(Max)

TheINA223includesatwo-wireinterfaceusedfor

–50ppm/°CGainDrift(Max)

adjustingtheconfigurationsettingsofthedevice.The

interfaceisusedtocontrolthesignal(currentshunt

•ProgrammableGains

voltage,busvoltage,orpower)thatisdirectedtothe

–CurrentShuntVoltageGains:20,128,300

deviceoutput.Multiplegainandattenuationsettings

–BusVoltageAttenuations:1/10,1/5,2/5

canbeprogrammedthroughthetwo-wireinterfaceto

allowforapplication-specificconfigurations.The

•Monitors/Measures/Reports:

programmablegainfeaturealsoallowsthedeviceto

–InstantaneousPower

beoperatedoveramuchwiderdynamiccurrentload

–BusVoltage

rangewithouthavingtoswitchthesensingelement

used.

–LoadCurrent

•QuiescentCurrent:250µA(Max)

Ashutdownfeatureisavailabletodisablethedevice

andeffectivelydisconnectitfromtheshuntresistor

•ShutdownCurrent:1µA(Max)

andsupplyvoltage,thusreducingthedrainonthe

battery.

APPLICATIONS

TheINA223operatesfromasingle+2.7-Vto+5.5-V

•NotebookComputers

supply,drawingamaximumsupplycurrentof250µA.

•CellPhones

Itisspecifiedovertheextendedtemperaturerangeof

•TelecomEquipment

–40°Cto+105°C,andisofferedinanSON-10

package.

•PowerManagement

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2TransZorbisatrademarkofGeneralInstruments,Inc.

3Allothertrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2012,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties