TIAMC1304多相电能测量系统参考设计TIDA－

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1、TIAMC1304多相电能测量系统参考设计TIDA-010时间：2017-05-1010:11:58作者：TI来源：中电网TI公司的AMC1304是集成了LDO的高精度输入输出隔离的△为调制器，隔离层高达7000VPEAK,符合DINVVDEV0884-10,UL1577和CSA标准，具有极好的DC性能，支持高精度系统检测:失调误差±50pV或±100pV,失调漂移小于1.3pV/^C,增益误差±0.2%或±0.3%,增益漂移小于±40ppm/°C,主要用于基于并联电阻的电流检测如工业马达驱动器,光伏逆变器和UPS以及隔离电

2、压测量.本文介绍了AMC1304主要特性，功能框图，频率逆变器应用电路图，以及多相电能测量系统参考设ITTIDA-01088主要特性和系统指标，框图，电路图，主要元件分布图和PCB设计图.TheAMC1304isaprecision,delta-sigma(AZ)modulatorwiththeoutputseparatedfromtheinputcircuitrybyacapacitivedoubleisolationbarrierthatishighlyresistanttomagneticinterferenee.Th

3、isbarrieriscertifiedtoprovidereinforcedisolationofupto7000VPEAKaccordingtotheDINVVDEV0884-10,UL1577andCSAstandards.Usedinconjunctionwithisolatedpowersupplies,thedevicepreventsnoisecurrentsonahighcommon・modevoltagelinefromenteringthelocalsystemgroundandinterferingwi

4、thordamaginglowvoltagecircuitry.TheinputoftheAMC1304isoptimizedfordirectconnectiontoshuntresistorsorotherlowvoltagelevelsignalsources・Theuniquelowinputvoltagerangeofthe±50-mVdeviceallowssignificantreductionofthepowerdissipationthroughtheshuntwhilesupportingexcellen

5、tacanddeperformance・Byusinganappropriatedigitalfilter(thatis,asintegratedontheTMS320F2807xorTMS320F2837Xfamilies)todecimatethebitstream,thedevicecanachieve16bitsofresolutionwithadynamicrangeof81dB(13.2ENOB)atadatarateof78kSPS.Onthehigh-side,themodulatorissuppliedby

6、anintegratedlow-dropout(LDO)regulatorthatallowsanunregulatedinputvoltagebetween4Vand18V(LDOIN).Theisolateddigitalinterfaceoperatesfroma3.3-Vor5-Vpowersupply(DVDD).TheAMC1304isavailableinawide-bodySOIC-16(DW)packageandisspecifiedfrom-40°Cto+125°C.AMC1304主要特性：VPin-Co

7、mpatibleFamilyOptimizedforShunt・Resistor・BasedCurrentMeasurements:-±50-mVor±250-mVInputVoltageRanges一CMOSorLVDSDigitalInterfaceOptions•ExcellentDCPerformaneeSupportingHigh-PrecisionSensingonSystemLevel:一OffsetError:±50pVor±100pV(max)-OffsetDrift:1.3pV/jaC(max)一Gain

8、Error:±0.2%or±0.3%(max)一GainDrift:±40ppm/°C(max)•Safety-RelatedCertifications:-7000-VPKReinforcedIsolationperDINVVDEV0884-10(VDEV0884-10):2006-12