AD7988-1中文说明

Rev.BInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specicationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2012AnalogDevices,Inc.Allrightsreserved.表1.MSOP、LFCSP(QFN)14/16/18位PulSAR®ADC位数100kSPS250kSPS400kSPS至500kSPS≥1000kSPSADC驱动器181AD76912AD76902AD79822AD79842ADA4941-1ADA4841-1161AD7684AD76872AD76882AD76932ADA4941-1ADA4841-1163AD7680AD7683AD7988-12AD76852AD7694AD76862AD7988-52AD79802ADA4841-1ADA4841-1ADA4841-1143AD7940AD79422AD79462ADA4841-1典型应用图REFGNDVDDIN+IN–VIOSDISCKSDOCNV1.8VTO5.5V3-OR4-WIREINTERFACE(SPI,DAISYCHAIN,CS)2.5VTO5V2.5V0VTOVREF10231-001AD7988-1/AD7988-5采用MSOP/LFCSP(QFN)封装的16位低功耗PulSARADCAD7988-1/AD7988-5产品特性低功耗AD7988-5：3.5mW(500kSPS)AD7988-1：700μW(100kSPS)16位分辨率、无失码吞吐速率：100kSPS/500kSPS可选INL：±0.6LSB(典型值)，±1.25LSB(最大值)SINAD：91.5dB(10kHz)THD：-114dB(10kHz)伪差分模拟输入范围0V至VREF(VREF在2.5V至5.5V之间)任意输入范围，可利用ADA4841-1轻松驱动无流水线延迟采用2.5V单电源供电，提供1.8V/2.5V/3V/5V逻辑接口SPI/QSPI/MICROWIRE™/DSP兼容串行接口以菊花链形式连接多个ADC10引脚MSOP和10引脚3mm×3mmLFCSP(QFN)(SOT-23尺寸)封装宽工作温度范围：−40°C至+125°C应用电池供电设备低功耗数据采集系统便携式医疗仪器自动测试设备数据采集通信概述AD7988-1/AD7988-5是16位、逐次逼近型模数转换器(ADC)，采用单电源VDD供电。AD7988-1提供100kSPS吞吐量，AD7988-5提供500kSPS吞吐量。两者均为采用多功能串行接口端口的低功耗、16位采样ADC。在CNV上升沿，器件对IN+与IN-之间的模拟输入电压差进行采样，范围从0V至VREF。基准电压(REF)由外部提供，并且可以独立于电源电压(VDD)。SPI兼容串行接口还能够利用SDI输入，通过一组三线式总线将几个ADC以菊花链形式连结起来。它采用独立电源VIO，兼容1.8V、2.5V、3V和5V逻辑。AD7988-1/AD7988-5采用10引脚MSOP封装或10引脚LFCSP(QFN)封装，工作温度范围为-40℃至+125°C。1真差分。2引脚兼容。3伪差分。图1ADI中文版数据手册是英文版数据手册的译文，敬请谅解翻译中可能存在的语言组织或翻译错误，ADI不对翻译中存在的差异或由此产生的错误负责。如需确认任何词语的准确性，请参考ADI提供的最新英文版数据手册。Rev.B|Page2of24目录修订历史2012年2月—修订版0：初始版AD7988-1/AD7988-5产品特性............................................................................................1应用.....................................................................................................1概述.....................................................................................................1典型应用图........................................................................................1修订历史............................................................................................2技术规格............................................................................................3时序规格........................................................................................5绝对最大额定值...............................................................................7ESD警告.........................................................................................7引脚配置和功能描述......................................................................8术语.....................................................................................................9典型性能指标................................................................................10工作原理.........................................................................................14电路信息.....................................................................................14转换器操作.................................................................................14典型连接图.................................................................................15模拟输入.....................................................................................16驱动放大器选择........................................................................16基准电压输入............................................................................17电源..............................................................................................17数字接口.....................................................................................17CS模式，三线式.......................................................................18CS模式，四线式.......................................................................19链模式..........................................................................................20应用信息.........................................................................................21与Blackn®DSP接口.................................................................21布局..............................................................................................21评估AD7988-x性能...................................................................21外形尺寸.........................................................................................22订购指南.....................................................................................232012年5月—修订版A至修订版B更改表3..............................................................................................4更新“外形尺寸”.............................................................................222012年2月—修订版0至修订版A添加LFCSP热阻值...........................................................................7更新“外形尺寸”.....