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1、TlDAC8760PLC16位模拟输出模块参考设计方案关键字：工业控制，可编逻辑控制器(PLC),DACTI公司的DAC7760和DAC8760是低成本全集成12位和16位数模转换器(DAC),设计用于满足工业过程控制的要求，输出电流在4mA・20mA,0mA-20mA或0mA・24mA或输出电压在0V-5V,0V-10V,±5V,或±10V,工作温度从-40°C到+125°C,主要用在4mA-20mA电流回路，模拟输出模，建筑物白动化相关设备,环境监测和可编逻辑控制器(PLC)•本文介绍了DAC77
2、60和DAC8760主要特性,框图，DACX760输出模块(AO)框图和DACx760评估模块主要特性,框图，电路图，材料清单与PCB元件布局图，以及PLC16位模拟输出(AO)模块参考设计主要特性,电路图和材料清单.16-BitAnalogOutputModuleReferenceDesignforProgrammableLogicControllers(PLC)TheDAC7760andDAC8760arelow-cost,precision,fully-integrated,12-bitand1
3、6-bitdigital-to-analogconverters(DACs)designedtomeettherequirementsofindustrialprocess-controlapplications.Thesedevicescanbeprogrammedasacurrentoutputwitharangeof4mAto20mA,0mAto20mA,or0mAto24mA;orasavoltageoutputwitharangeof0Vto5V,0Vto10V,±5V,or±10V,wit
4、ha10%overrange(0Vto5.5V,0Vto11V,±5.5V,or±11V).Bothcurrentandvoltageoutputscanbesimultaneouslyenabledwhilebeingcontrolledbyasingledataregister.Thesedevicesincludeapower-on・resetfunctiontoensurepoweringupinaknownstate(bothIOUTandVOUTaredisabledandinaHi-Zs
5、tate).TheCLRandCLR-SELpinssetthevoltageoutputstozero-scaleormidscale,andthecurrentoutputtothelowendoftherange,iftheoutputisenabled・Zeroandgainregisterscanbeprogrammedtodigitallycalibratethedeviceintheendsystem・Theoutputslewrateisalsoprogrammablebyregist
6、er.ThesedevicescansuperimposeanexternalHARTsignalonthecurrentoutputandcanoperatewitheitherasingle+10-Vto+36-Vsupply,ordualsuppliesofupto±18V.Allversionsareavailableinboth6-mmx6-mmQFN-40andTSSOP-24packages.DAC8760主要特性:CurrentOutput:4mAto20mA;0mAto20mA;0m
7、Ato24mAVoltageOutput:0Vto5V;0Vto10V;±5V;±10V0Vto5.5V;0Vto11V;±5.5V;±11V(10%Overrange)±0.1%FSRTotalUnadjustedError(TUE)MaxDNL:±1LSBMaxSimultaneousVoltageandCurrentOutputInternal5-VReference(10ppm/°C,max)Internal4.6-VPower-SupplyOutputReliabilityFeatures:
8、CRCCheckandWatchdogTimerThermalAlarmOpenAlarm,ShortCurrentLimitWideTemperatureRange:-40°Cto+125°C6-mmx6-mmQFN-40;TSSOP-24PackagesDAC8760应用：•4-mAto20-mACurrentLoops•AnalogOutputModules•BuildingAutomationRELATEDDEVICES•EnvironmentM
