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AIN1

AIN8

MUX

T/H

ADC78H90

SCLK

AV

DD

AGND

DGND

DV

DD

CS

DIN

DOUT

CONTROL

LOGIC

12-BIT

SUCCESSIVE

APPROXIMATION

ADC

.

.

.

AGND

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

CSSCLK

AV

DD

DOUT

AGNDDIN

AIN1DV

DD

AIN2DGND

AIN3AIN8

AIN4AIN7

AIN5AIN6

ADC78H90

ADC78H90

www.ti.com

SNAS227D–NOVEMBER2003–REVISEDMARCH2013

ADC78H908-Channel,500kSPS,12-BitA/DConverter

CheckforSamples:ADC78H90

TheADC78H90ispackagedina16-leadTSSOP

1

FEATURES

package.Operationovertheindustrialtemperature

2

•Eightinputchannels

rangeof−40°Cto+85°Cisensured.

•Variablepowermanagement

ConnectionDiagram

•Independentanaloganddigitalsupplies

•SPI™/QSPI™/MICROWIRE™/DSPcompatible

•Packagedin16-leadTSSOP

APPLICATIONS

•AutomotiveNavigation

•PortableSystems

•MedicalInstruments

•MobileCommunications

•InstrumentationandControlSystems

KEYSPECIFICATIONS

Figure1.16-LeadTSSOP

•ConversionRate:500kSPS

SeePWPackage

•DNL:±1LSB(max)

•INL:±1LSB(max)

BlockDiagram

•PowerConsumption

–3VSupply:1.5mW(typ)

–5VSupply:8.3mW(typ)

DESCRIPTION

TheADC78H90isalow-power,eight-channelCMOS

12-bitanalog-to-digitalconverterwithaconversion

throughputof500kSPS.Theconverterisbasedona

successive-approximationregisterarchitecturewith

aninternaltrack-and-holdcircuit.Itcanbeconfigured

toacceptuptoeightinputsignalsatinputsAIN1

throughAIN8.

Theoutputserialdataisstraightbinary,andis

compatiblewithseveralstandards,suchasSPI™,

QSPI™,MICROWIRE™,andmanycommonDSP

PINDESCRIPTIONSANDEQUIVALENTCIRCUITS

serialinterfaces.

PinEquivalentDescription

Symbol

TheADC78H90maybeoperatedwithindependent

No.Circuit

analoganddigitalsupplies.Theanalogsupply(AV

DD

)

ANALOGI/O

canrangefrom+2.7Vto+5.25V,andthedigital

4-AIN1toAnaloginputs.Thesesignals

supply(DV

DD

)canrangefrom+2.7VtoAV

DD

.Normal

11AIN8canrangefrom0VtoAV

DD

.

powerconsumptionusinga+3Vor+5Vsupplyis1.5

DIGITALI/O

mWand8.3mW,respectively.Thepower-down

featurereducesthepowerconsumptiontojust0.3

µWusinga+3Vsupply,or0.5µWusinga+5V

supply.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer