AD7193-cn

产品特性快速建立滤波器选项4个差分/8个伪差分输入通道均方根(RMS)噪声：11nV@4.7Hz(G=128)15.5位无噪声分辨率(2.4kHz,G=128)无噪声分辨率高达22位(G=1)失调漂移：±5nV/°C增益漂移：±1ppm/°C稳定的时间漂移特性自动通道序列器可编程增益(1至128)输出数据速率:4.7Hz至4.8kHz内部或外部时钟50Hz/60Hz同时抑制4路通用数字输出电源AVDD：3V至5.25VDVDD：2.7V至5.25V电流：4.65mA温度范围：-40℃至+105℃28引脚TSSOP和32引脚LFCSP封装接口三线式串行接口SPI、QSPI™、MICROWIRE™和DSP兼容SCLK引脚内的施密特触发应用PLC/DCS模拟输入模块概述AD7193是一款适合高精密测量应用的低噪声完整模拟前端。它集成一个低噪声、24位Σ-Δ型模数转换器(ADC)。片内低噪声增益级意味着可直接输入小信号。这款器件可配置为四路差分输入或八路伪差分输入。片内通道序列器可以同时使能多个通道，AD7193按顺序在各使能通道上执行转换，简化了与器件的通信。片内4.92MHz时钟可以用作ADC的时钟源；或者，也可以使用外部时钟或晶振。该器件的输出数据速率可在4.7Hz至4.8kHz的范围内变化。这款器件具有非常灵活的数字滤波器，包括一个快速建立选项。输出数据速率和建立时间等变量取决于所选的选项。AD7193同时包括零延迟选项。这款器件的工作电源电压为3V至5.25V，功耗为4.65mA，采用28引脚TSSOP封装和32引脚LFCSP封装。内置PGA的4通道、4.8kHz、超低噪声、24位Σ-Δ型ADCAD7193Rev.BInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specicationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2009–2010AnalogDevices,Inc.Allrightsreserved.功能框图MCLK1MCLK2P0/REFIN2(–)P1/REFIN2(+)DVDDDGNDREFIN1(+)REFIN1(–)AIN1AIN2AIN3AIN4AINCOMBPDSWAGNDAD7193SERIALINTERFACEANDCONTROLLOGICTEMPSENSORCLOCKCIRCUITRYDOUT/RDYDINSCLKCSSYNCP3P2AVDDAGNDAIN5AIN6AIN7AIN8Σ-ADCPGAMUX08367-001图1数据采集应变栅传感器压力测量温度测量流量测量电子秤色谱医疗与科学仪器ADI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|Page2of56目录AD7193特性...................................................................................................1应用...................................................................................................1概述...................................................................................................1功能框图..........................................................................................1修订历史..........................................................................................2技术规格..........................................................................................3时序特性.....................................................................................7绝对最大额定值.............................................................................9热阻.............................................................................................9ESD警告......................................................................................9引脚配置和功能描述..................................................................10典型工作特性...............................................................................14均方根噪声与分辨率..................................................................17Sinc4斩波禁用..........................................................................17Sinc3斩波禁用..........................................................................18快速建立...................................................................................19片上寄存器....................................................................................20通信寄存器..............................................................................21状态寄存器..............................................................................22模式寄存器..............................................................................23配置寄存器..............................................................................26数据寄存器.............................................................................28ID寄存器..................................................................................28GPOCON寄存器....................................................................28失调寄存器.............................................................................29满量程寄存器.........................................................................29ADC电路信息..............................................................................30概述..........................................................................................30模拟输入通道..........................................................................31可编程增益阵列(PGA).........................................................31基准电压...................................................................................31基准电压检测..........................................................................32双极性/单极性配置................................................................32数据输出编码..........................................................................32激励电流...................................................................................32通道序列器..............................................................................32数字接口..................................................................................33复位..........................................................................................37系统同步................