Texas Instruments DAC8568 Handleiding

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DAC7568

DAC8168

DAC8568

DataBufferA

DACRegisterA

BufferControlRegisterControl

ControlLogic

32-BitShiftRegister

Power-Down

ControlLogic

AV

DD

V

REFREF

IN/VOUT

12-/14-/16-Bit

DAC

CLR

LDACGND

D

IN

SCLK

SYNC

2.5V

Reference

12-/14-/16-Bit

DAC

DataBufferB

DACRegisterB

12-/14-/16-Bit

DAC

DataBufferC

DataBufferD

DataBufferE

DataBufferF

DataBufferG

DACRegisterC

DACRegisterD

DACRegisterE

DACRegisterF

DACRegisterG

12-/14-/16-Bit

DAC

12-/14-/16-Bit

DAC

12-/14-/16-Bit

DAC

12-/14-/16-Bit

DAC

12-/14-/16-Bit

DAC

VH

OUT

DataBufferH

DACRegisterH

VG

OUT

VF

OUT

VE

OUT

VD

OUT

VC

OUT

VB

OUT

VA

OUT

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

DAC7568

,

DAC8168

,

DAC8568

SBAS430F–JANUARY2009–REVISEDAPRIL2018

DAC7568,DAC8168,DAC856812-/14-/16-Bit,Octal-Channel,UltralowGlitch,Voltage

Output,Digital-to-AnalogConverterswith2.5-V2-ppm/°CInternalReference

1

1Features

1

•RelativeAccuracy:

–DAC7568(12-Bit):0.3LSBINL

–DAC8168(14-Bit):1LSBINL

–DAC8568(16-Bit):4LSBINL

•GlitchEnergy:0.1nV-s

•InternalReference:

–2.5VReferenceVoltage(disabledbydefault)

–0.004%InitialAccuracy(typ)

–2ppm/°CTemperatureDrift(typ)

–5ppm/°CTemperatureDrift(max)

–20mASink/SourceCapability

•Power-OnResettoZeroScaleorMidscale

•UltralowPowerOperation:1.25mAat5VIncluding

InternalReferenceCurrent

•WidePower-SupplyRange:+2.7Vto+5.5V

•MonotonicOverEntireTemperatureRange

•Low-PowerSerialInterfacewithSchmitt-Triggered

Inputs:Upto50MHz

•On-ChipOutputBufferAmplifierwithRail-to-Rail

Operation

•TemperatureRange:–40°Cto+125°C

2Applications

•PortableInstrumentation

•Closed-LoopServo-Control/ProcessControl

•DataAcquisitionSystems

•ProgrammableAttenuation,DigitalGain,and

OffsetAdjustment

•ProgrammableVoltageandCurrentSources

3Description

TheDAC7568,DAC8168,andDAC8568arelow-

power,voltage-output,eight-channel,12-,14-,and

16-bitdigital-to-analogconverters(DACs),

respectively.Thesedevicesincludea2.5V,2ppm/°C

internalreference(disabledbydefault),givingafull-

scaleoutputvoltagerangeof2.5Vor5V.Theinternal

referencehasaninitialaccuracyof0.004%andcan

sourceupto20mAattheV

REF

IN/V

REF

OUTpin.

Thesedevicesaremonotonic,providingexcellent

linearityandminimizingundesiredcode-to-code

transientvoltages(glitch).Theyuseaversatile3-wire

serialinterfacethatoperatesatclockratesupto

50MHz.Theinterfaceiscompatiblewithstandard

SPI™,QSPI™,Microwire™,anddigitalsignal

processor(DSP)interfaces.

TheDAC7568,DAC8168,andDAC8568incorporate

apower-on-resetcircuitthatensurestheDACoutput

powersupateitherzeroscaleormidscaleuntila

validcodeiswrittentothedevice.Thesedevices

containapower-downfeature,accessedoverthe

serialinterface,thatreducescurrentconsumptionto

typically0.18μAat5V.Powerconsumption(including

internalreference)istypically2.9mWat3V,reducing

tolessthan1μWinpower-downmode.Thelow

powerconsumption,internalreference,andsmall

footprintmakethesedevicesidealforportable,

battery-operatedequipment.

TheDAC7568,DAC8168,andDAC8568aredrop-in

andfunction-compatiblewitheachother,andare

availableinTSSOP-16andTSSOP-14packages.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

DAC7568

TSSOP(14)5.00mmx4.40mm

TSSOP(16)5.00mmx4.40mm

DAC8168

TSSOP(14)5.00mmx4.40mm

TSSOP(16)5.00mmx4.40mm

DAC8568TSSOP(16)5.00mmx4.40mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

BlockDiagram

Product specificaties