文档介绍：MicrochipMCP39143V八路模拟前端(AFE)解决方案关键字:工业控制,仪器仪表,测试测量,多相电表Microchip公司的MCP3914是3V八路模拟前端(AFE),包括8个同步取样的Delta-Sigma模数转换器(ADC),8个PGA,相位延迟补偿区块,低漂移基准电压,数字失调和增益误差校准寄存器以及高速20MHzSPI兼容的串口,主要用在多相电表,电表和能量管理,汽车,手持仪表,医疗和电源监视,音频/,功能框图,以及MCP3914ADC评估板主要特性,PIM模块和MCP3914数字连接图,电路图,-channelAnalogFrontEnd(AFE),containingeightsynchronoussamplingdelta-sigma,Analog-to-DigitalConverters(ADC),eightPGAs,pensationblock,low-driftinternalvoltagereference,digitaloffsetandgainerrorcalibrationregisters,andhigh-,withfeaturessuchas:16/24-bitresolution,OversamplingRatio(OSR)from32to4096,gainfrom1xto32x,independentShutdownandReset,-mands,includingvariouscontinuousread/writemodesand16/24/32-ess(DMA)ofan8/16-or32-bitMCU,andwiththeseparatedatareadypinthatcandirectlybeconnectedtoanInterruptRequest(IRQ),suchasaCRC--maplockthroughan8-,includingshunts,currenttransformers,RogowskicoilsandHall-:?EightSynchronousSampling24-bitResolutionDelta-SigmaAnalog-to-Digital(A/D)Converters?,-107dBcTotalHarmonicDistortion(THD)(upto35thHarmonic),112dBFSSFDRforEachChannel?%TypicalActivePowerMeasurementErrorovera10,000:1DynamicRange?AdvancedSecurityFeatures:-16-bitCyclicRedundancyCheck(CRC)municationsforsecuredatatransfers-16-hecksumandinterruptalertforregistermapconfiguration-Registermaplockwith8-bitsecurekey?-,DVDD?ProgrammableDataRateupto125ksps:-4MHzMaximumSamplingFrequency-16MHzMaximumMasterClock?OversamplingRatioupto4096?Ultra-LowPowerShutdownModewith<10μA?-122dBCrosstalkbetweenChannels?:9ppm/℃?DifferentialVoltageReferenceInputPins?High