Texas Instruments ADS1204 Handleiding

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CH A+

CH A-

REFIN A

CH B+

CH B-

REFIN B

CH C+

CH C-

REFIN C

CH D+

CH D-

REFIN D

REFOUT

2nd-Order

¨™ Modulator

2nd-Order

¨™ Modulator

2nd-Order

¨™ Modulator

2nd-Order

¨™ Modulator

Reference

Voltage

2.5 V

Divider

Clock

Select

RC

Oscillator

20 MHz

OutEN

Output

Interface

Circuit

OUT A

OUT B

OUT C

CLKOUT

AGNDBGND

AV

DD

BV

DD

+

±

+

±

+

±

+

±

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Folder

Order

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

ADS1204

SBAS301D–OCTOBER2003–REVISEDFEBRUARY2020

ADS1204Four1-Bit,10-MHz,2nd-Order,Delta-SigmaModulators

1

1Features

1

•16-bitresolution

•14-bitlinearity

•Resolution,speedtrade-off:

10-biteffectiveresolutionwith10-µssignaldelay

(12-bitwith19µs)

•±2.5-Vinputrangeat2.5V

•Internalreferencevoltage:2%

•Gainerror:0.5%

•Fourindependentdelta-sigmamodulators

•Fourinputreferencebuffers

•Onboard20-MHzoscillator

•Selectableinternalorexternalclock

•Operatingtemperaturerange:

–40°Cto+105°C

•Package:VQFN-32(5mm×5mm)

2Applications

•Motorcontrols

•Currentmeasurement

•Industrialprocesscontrols

•Smarttransmitters

•Weightscales

•Pressuretransducers

•Portableinstruments

•Instrumentation

3Description

TheADS1204isafour-channel,high-performance

device,withfourdelta-sigma(ΔΣ)modulatorswith

100-dBdynamicrange,operatingfromasingle5-V

supply.Thedifferentialinputsareidealfordirect

connectiontotransducersinanindustrial

environment.Withtheappropriatedigitalfilterand

modulatorrate,thedevicecanbeusedtoachieve

16-bitanalog-to-digital(A/D)conversionwithno

missingcode.Effectiveresolutionof12bitscanbe

obtainedwithadigitalfilterdatarateof160kHzata

modulatorrateof10MHz.TheADS1204isdesigned

foruseinmedium-tohigh-resolutionmeasurement

applicationsincludingcurrentmeasurements,smart

transmitters,industrialprocesscontrol,weightscales,

chromatography,andportableinstrumentation.Itis

availableinaVQFN-32(5×5)package.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

ADS1204VQFN(32)5.00mm×5.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

FunctionalBlockDiagram

Product specificaties