Texas Instruments ADS1675 Handleiding

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DS

Modulator

AINP

AINN

ADS1675

DVDD

DGND

AGND

AVDDVREFPVREFN

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

CLK

PLL

3x

ADS1675

www.ti.com

SBAS416D–DECEMBER2008–REVISEDAUGUST2010

4MSPS,24-BitAnalog-to-DigitalConverter

CheckforSamples:ADS1675

1

FEATURES

DESCRIPTION

2

•ACPerformance:

TheADS1675isahigh-speed,high-precision

103dBofDynamicRangeat4MSPS

analog-to-digitalconverter(ADC).Usinganadvanced

111dBofDynamicRangeat125kSPS

delta-sigma(ΔΣ)architecture,itoperatesatspeeds

upto4MSPSwithoutstandingacperformanceand

–107dBTHD

dcaccuracy.

•DCAccuracy:

3ppmINL

TheADS1675ADCiscomprisedofalow-drift

4mV/°COffsetDrift

modulatorwithout-of-rangedetectionandadual-path

programmabledigitalfilter.Thedualfilterpathallows

4ppm/°CGainDrift

theusertoselectbetweentwopost-processingfilters:

•ProgrammableDigitalFilterwith

Low-LatencyorWide-Bandwidth.TheLow-Latency

User-SelectablePath:

filtersettlesquickly(asfastas2.65ms)for

–Low-Latency:Completelysettlesin2.65ms

applicationswithlargeinstantaneouschanges,such

asamultiplexer.TheWide-Bandwidthpathprovides

–Wide-Bandwidth:1.7MHzBWwithflat

anoptimizedfrequencyresponseforac

passband

measurementswithapassbandrippleoflessthan

•FlexibleRead-OnlySerialInterface:

±0.00002dB,stopbandattenuationof86dB,anda

–StandardCMOS

bandwidthof1.7MHz.

–SerializedLVDS

Thedeviceofferstwospeedmodeswithdistinct

•EasyConversionControlwithSTARTPin

interface,resolution,andfeatureset.Inthe

high-speedmodethedevicecanbesettooperateat

•Out-of-RangeDetection

either4MSPSor2MSPS.Inthelow-speedmode,it

•Supply:Analog+5V,Digital+3V

canbesettooperateateither1MSPS,500KSPS,

•Power:575mW

250KSPSor125KSPS.

TheADS1675iscontrolledthroughI/Opins—there

APPLICATIONS

arenoregisterstoprogram.AdedicatedSTARTpin

•AutomatedTestEquipment

allowsfordirectcontrolofconversions:togglethe

•MedicalImaging

STARTpintobeginaconversion,andthenretrieve

theoutputdata.Theflexibleserialinterfacesupports

•ScientificInstrumentation

datareadbackwitheitherstandardCMOSandLVDS

•TestandMeasurement

logiclevels,allowingtheADS1675todirectlyconnect

toawiderangeofmicrocontrollers,digitalsignal

processors(DSPs),orfield-programmablegridarrays

(FPGAs).

TheADS1675operatesfromananalogsupplyof5V

anddigitalsupplyof3V,anddissipates575mWof

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