Texas Instruments ADS1672 Handleiding

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ADS1672

DS

Modulator

DVDD

DGND

AINP

AINN

ADS1672

AGND

AVDD

VREFP

VREFN

Dual

Path

Filter

Low-LatencyFilter

Wide-BandwidthFilter

CMOSand

LVDS

Compatible

Serial

Interface

DataReady

DataOutput

SerialShiftClock

ChipSelect

InterfaceConfiguration

MasterClock

FilterPath

DataRate

StartConversion

PowerDown

Out-of-Range

Control

ADS1672

www.ti.com

SBAS402D–JUNE2008–REVISEDJULY2010

625kSPS,24-BitAnalog-to-DigitalConverter

CheckforSamples:ADS1672

1

FEATURES

DESCRIPTION

2

•ACPerformance:

TheADS1672isahigh-speed,high-precision

107dBofDynamicRangeat625kSPS

analog-to-digitalconverter(ADC).Usinganadvanced

115.5dBofDynamicRangeat78kSPS

delta-sigma(ΔΣ)architecture,itoperatesatspeeds

upto625kSPSwithoutstandingacperformanceand

–113dBTHD

dcaccuracy.

•DCAccuracy:

3ppmINL

TheADS1672ADCiscomprisedofalow-drift,

2mV/°COffsetDrift

chopper-stabilizedmodulatorwithout-of-range

detectionandadual-pathprogrammabledigitalfilter.

2ppm/°CGainDrift

Thedualfilterpathallowstheusertoselectbetween

•ProgrammableDigitalFilterwith

twopost-processingfilters:low-latencyor

User-SelectablePath:

wide-bandwidth.Thelow-latencyfiltersettlesquickly

–Low-Latency:Completelysettlesin5.5ms

inonecycle,forapplicationswithlargeinstantaneous

changes,suchasamultiplexer.Thewide-bandwidth

–Wide-Bandwidth:305kHzBWwithflat

pathprovidesanoptimizedfrequencyresponseforac

passband

measurementswithapassbandrippleoflessthan

•FlexibleRead-OnlySerialInterface:

0.001dB,stopbandattenuationof86dB,anda

–StandardCMOS

bandwidthof305kHz.

–SerializedLVDS

TheADS1672iscontrolledthroughI/Opins—there

•EasyConversionControlwithSTARTPin

arenoregisterstoprogram.AdedicatedSTARTpin

allowsfordirectcontrolofconversions:togglethe

•Out-of-RangeDetection

STARTpintobeginaconversion,andthenretrieve

•Supply:Analog+5V,Digital+3V

theoutputdata.Theflexibleserialinterfacesupports

•Power:350mW

datareadbackwitheitherstandardCMOSandLVDS

logiclevels,allowingtheADS1672todirectlyconnect

APPLICATIONS

toawiderangeofmicrocontrollers,digitalsignal

processors(DSPs),orfield-programmablegridarrays

•AutomatedTestEquipment

(FPGAs).

•VibrationAnalysis

TheADS1672operatesfromananalogsupplyof5V

•Sonar

anddigitalsupplyof3V,anddissipates350mWof

•TestandMeasurement

power.Whennotinuse,thePDWNpincanbeused

topowerdownalldevicecircuitry.Thedeviceisfully

specifiedovertheindustrialtemperaturerangeandis

offeredinaTQFP-64package.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2008–2010,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties