Texas Instruments DAC5672 Bedienungsanleitung

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DE-

MUX

DA[13:0]

DB[13:0]

MODE

GSET

Latch A

Latch B

14−b DAC

14−b DAC

IOUTA1

IOUTA2

IOUTB1

IOUTB2

1.2 V Reference

WRTBWRTACLKBCLKA

BIASJ_A

BIASJ_B

EXTIO

DVDDDGNDAVDDAGND

SLEEP

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

DAC5672

SLAS440D–NOVEMBER2004–REVISEDAUGUST2017

DAC567214-Bit275MSPSDigital-to-AnalogConverter

1

1Features

1

•14-BitDualTransmitDigital-to-AnalogConverter

(DAC)

•275MSPSUpdateRate

•Single-Supply:3Vto3.6V

•HighSpurious-FreeDynamicRange(SFDR):84

dBcat5MHz

•HighThird-OrderTwo-ToneIntermodulation

(IMD3):79dBcat15.1MHzand16.1MHz

•WCDMAAdjacentChannelLeakageRatio

(ACLR):78dBatBaseband

•WCDMAACLR:73dBat30.72MHz

•IndependentorSingleResistorGainControl

•DualorInterleavedData

•On-Chip1.2-VReference

•LowPower:330mW

•Power-DownMode:9mW

•Package:48-PinThin-QuadFlatPack(TQFP)

2Applications

•CellularBaseTransceiverStationTransmit

Channel

–CDMA:W-CDMA,CDMA2000,IS-95

–TDMA:GSM,IS-136,EDGEandUWC-136

•MedicalandTestInstrumentation

•ArbitraryWaveformGenerators(ARB)

•DirectDigitalSynthesis(DDS)

•CableModemTerminationSystem(CMTS)

3Description

TheDAC5672deviceisamonolithic,dual-channel,

14-bit,high-speedDACwithon-chipvoltage

reference.

Operatingwithupdateratesofupto275MSPS,the

DAC5672offersexceptionaldynamicperformance,

tight-gain,andoffsetmatchingcharacteristicsthat

makethedevicewell-suitedinI/Qbasebandordirect

IFcommunicationapplications.

EachDAChasahigh-impedance,differential-current

outputsuitableforsingle-endedordifferentialanalog-

outputconfigurations.Externalresistorsallowscaling

thefull-scaleoutputcurrentforeachDACseparately

ortogether,typicallybetween2mAand20mA.An

accurateon-chipvoltagereferenceistemperature-

compensatedanddeliversastable1.2-Vreference

voltage.Optionally,anexternalreferencemaybe

used.

TheDAC5672hastwo,14-bit,parallelinputports

withseparateclocksanddatalatches.Forflexibility,

theDAC5672supportsmultiplexeddataforeach

DACononeportwhenoperatingininterleaved

mode.

TheDAC5672isspecificallydesignedfora

differentialtransformer-coupledoutputwitha50-Ω

doubly-terminatedload.Fora20-mAfull-scaleoutput

current,a4:1impedanceratio(resultinginanoutput

powerof4dBm)and1:1impedanceratiotransformer

(–2dBmoutputpower)aresupported.

TheDAC5672isavailableina48-pinTQFPpackage.

Pincompatibilitybetweenfamilymembersprovides

12-bit(DAC5662)and14-bit(DAC5672)resolutions.

Furthermore,theDAC5672ispincompatibletothe

DAC2904andAD9767dualDACs.Thedeviceis

characterizedforoperationovertheindustrial

temperaturerangefrom–40°Cto85°C.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

DAC5672TQFP(48)7.00mm×7.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

FunctionalBlockDiagram

Produktspezifikationen