Texas Instruments LPV821 Handleiding

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Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LPV821

SNOSD36A–AUGUST2017–REVISEDDECEMBER2017

LPV821,650nA,Precision,Nanopower,Zero-DriftAmplifier

1

1Features

1

•QuiescentCurrent:650nA

•LowOffsetVoltage:±10μV(Maximum)

•OffsetVoltageDrift:±0.096μV/°C(Maximum)

•0.1-Hzto10-HzNoise:3.9μV

PP

•InputBiasCurrent:±7pA

•GainBandwidth:8kHz

•SupplyVoltage:1.7Vto3.6V

•Rail-to-RailInput/Output

•IndustryStandardPackage

–Singlein5-pinSOT-23

•EMIHardened

2Applications

•Battery-PoweredInstruments

•GasDetection

•ProcessAnalytics

•FaultMonitoring

•CurrentSensing

–ShuntResistor

–CurrentTransformer

•TemperatureMeasurements

–HighImpedanceThermistors

–RTD's,Thermocouples

•StrainGauges

–ElectronicScales

–PressureSensors

3Description

TheLPV821isasingle-channel,nanopower,zero-

driftoperationalamplifierfor“AlwaysON”sensing

applicationsinwirelessandwiredequipmentwhere

lowinputoffsetisrequired.Withthecombinationof

lowinitialoffset,lowoffsetdrift,and8kHzof

bandwidthfrom650nAofquiescentcurrent,the

LPV821istheindustry'slowestpowerzero-drift

amplifierthatcanbeusedforendequipmentthat

monitorcurrentconsumption,temperature,gas,or

straingauges.

TheLPV821zero-driftoperationalamplifierusesa

proprietaryauto-calibrationtechniqueto

simultaneouslyprovidelowoffsetvoltage(10μV,

maximum)andminimaldriftovertimeand

temperature.Inadditiontohavinglowoffsetand

ultra-lowquiescentcurrent,theLPV821amplifierhas

pico-ampbiascurrentswhichreduceerrors

commonlyintroducedinapplicationsmonitoring

sensorswithhighoutputimpedanceandamplifier

configurationswithmegaohmfeedbackresistors.

DeviceInformation

(1)

PART

NUMBER

CHAN

COUNT

PACKAGEBODYSIZE(NOM)

LPV8211SOT-23(5)2.90mm×1.60mm

LPV822

(2)

2WSON(8)2.00mm×2.00mm

PrecisionNano-PowerAmplifierFamily

FAMILY

CHAN

COUNT

I

Q

PER

CHAN

V

OS

(MAX)V

SUPPLY

LPV8211650nA10µV1.7to3.6V

LPV8111450nA370µV1.6to5.5V

LPV8122425nA300µV1.6to5.5V

OPA3691,2800nA750µV1.8to5.5V

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

(2)Plannedfornear-futurerelease

Low-Side,Always-OnCurrentSense

Product specificaties