NXPADC1213D双路125Msps模数转换方案

NXPADC1213D双路125Msps模数转换方案NXP公司的ADC1213D系列是双路取样频率从65Msps到125Msps的12位模数转换器,具有宽动态范围和低功耗特性,流水线架构和输出误差修正保证ADC1213D系列在整个工作范围内不会丢码.单电源工作:模拟电源3.3V,输出驱动器1.8V.ADC1213D的SNR达73dB,SFDR为90dBc.可用在有线和无线宽带通信,频谱分析,手提仪表,超声设备和图像设备.本文介绍了ADC1213D系列主要特性,方框图,输入取样电路,单个和两个变压器配置图,基准等效电路图以及所实现的JESD240A串行器详细框图.ADC1213D065/080/105/125:Dual12-bitADC;65,80,105or125MspsTheADC1213Disadualchannel12-bitAnalog-to-DigitalConverter(ADC)optimizedforhighdynamicperformancesandlowpoweratsampleratesupto125Msps.PipelinedarchitectureandoutputerrorcorrectionensuretheADC1213Disaccurateenoughtoguaranteezeromissingcodesovertheentireoperatingrange.Suppliedfroma3.3Vsourceforanaloganda1.8Vsourcefortheoutputdriver,itcanoutputdatainserialmode,becauseofthetwolanesofdifferentialoutputs,whicharecompliantwiththeJESD204Astandard.AnintegratedSerialPeripheralInterface(SPI)allowstheusertoeasilyconfiguretheADC.AsetofICconfigurationsisalsoavailableviathebinarylevelcontrolpins,whichareusedatpower-up.Thedevicealsoincludesaprogrammablegainamplifierwithflexibleinputvoltagerange.Excellentdynamicperformanceismaintainedfromthebasebandtoinputfrequenciesof170MHzormore,makingtheADC1213Didealforuseincommunications,imagingandmedicine.ADC1213D主要特性:SNR,73dBSFDR,90dBcSamplerateupto125MspsDualchannel12-bitpipelinedADCcore3.3V,1.8VsinglesuppliesFlexibleinputvoltagerange:1V(p-p)to2V(p-p)with6dBprogrammablefinegainOffsetbinary,2’scomplement,graycode2configurableserialoutputsCompliantwithJESD204AserialtransmissionstandardHVQFN56package0.5LSBINL1LSB;DNLInputbandwidth,600MHzPowerdissipation,995mWat80MspsDutycyclestabilizerHighIFcapabilityPower-downandSleepmodesADC1213D应用:WirelessandwiredbroadbandcommunicationsSpectralanalysisPortableinstrumentationUltrasoundequipmentImagingsystemsAO-Electronics傲壹电子官网：中文网：图1.ADC1213D方框图图2.ADC1213D输入取样电路图3.ADC1213D单个变压器配置图图4.ADC1213D双变压器配置图图5.ADC1213D基准等效电路图(1)图6.ADC1213D基准等效电路图(2)图7.采用ADC1213D实现带调试功能的JESD240A串行器详细框图