AD8232-中文产品数据手册

AD8232Rev.0InformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specicationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2012AnalogDevices,Inc.Allrightsreserved.功能框图图1.LOD–LOD+AD8232+VSGNDOUTOPAMP–REFOUTOPAMP+SWREFINIAOUTHPSENSEHPDRIVE+IN–INRLDRLDFBFRSDNAC/DCLEADS-OFFDETECTION10kΩ10kΩ150kΩS1S22021341918171615IAA356789A110A21413121110866-001C2C1单导联心率监护前端产品特性全集成式单导联ECG前端低电源电流：170µA(典型值)共模抑制比：80dB(DC至60Hz)两个或三个电极配置高信号增益(G=100)，带DC阻塞能力2极点可调高通滤波器接受高达±300mV的半电池电位快速恢复功能减少了滤波器的建立时间无使用约束运算放大器3极点可调低通滤波器，带可调增益导联脱落检测：交流或直流选择集成右腿驱动(RLD)放大器单电源供电：2.0V至3.5V集成基准电压缓冲器产生虚拟地轨到轨输出内部RFI滤波器8kVHBMESD额定值关断引脚20引脚4mm×4mmLFCSP封装应用健身及运动心率监护仪便携式ECG远程健康监护游戏外围设备生物电信号采集概述AD8232是一款用于ECG及其他生物电测量应用的集成信号调理模块。该器件设计用于在具有运动或远程电极放置产生的噪声的情况下提取、放大及过滤微弱的生物电信号。该设计使得超低功耗模数转换器(ADC)或嵌入式微控制器能够轻松地采集输出信号。AD8232采用双极点高通滤波器来消除运动伪像和电极半电池电位。该滤波器与仪表放大器结构紧密耦合，可实现单级高增益及高通滤波，从而节约了空间和成本。AD8232采用一个无使用约束运算放大器来创建一个三极点低通滤波器，消除了额外的噪声。用户可以通过选择所有滤波器的截止频率来满足不同类型应用的需要。为了提高系统线路频率和其他不良干扰的共模抑制性能，AD8232内置一个放大器，用于右侧驱动(RLD)等受驱导联应用。AD8232包含一项快速恢复功能，可以减少高通滤波器原本较长的建立长尾现象。如果放大器轨电压发生信号突变(如导联脱离情况)，AD8232将自动调节为更高的滤波器截止状态。该功能让AD8232可以实现快速恢复，因而在导联连接至测量对象的电极之后能够尽快取得有效的测量值。AD8232采用4mm×4mm、20引脚LFCSP封装。额定温度范围为0°C至70℃，能在-40℃至+85℃的范围内工作。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.0|Page2of28目录修订历史2012年8月—修订版0：初始版特性...................................................................................................1应用...................................................................................................1功能框图..........................................................................................1概述...................................................................................................1修订历史..........................................................................................2技术规格..........................................................................................3绝对最大额定值.............................................................................6ESD警告......................................................................................6引脚配置和功能描述....................................................................7典型工作特性.................................................................................8仪表放大器性能曲线...............................................................8运算放大器性能曲线.............................................................11右腿驱动(RLD)放大器性能曲线.........................................14基准电压缓冲器性能曲线....................................................15系统性能曲线..........................................................................16工作原理........................................................................................17架构概览...................................................................................17仪表放大器..............................................................................17运算放大器..............................................................................17右腿驱动放大器......................................................................17基准电压缓冲器......................................................................18快速恢复电路..........................................................................18导联脱落检测..........................................................................19待机操作...................................................................................19输入保护...................................................................................20射频干扰(RFI).........................................................................20电源调整与旁路......................................................................20折合到输入端的失调.............................................................20布局建议...................................................................................20应用信息........................................................................................21消除电极失调..........................................................................21高通滤波...................................................................................21低通滤波和增益......................................................................23驱动电极...................................................................................23应用电路........................................................................................24心脏附近心率测量.................................................................24应用练习：在双手处测量心率...........................................24心脏监护仪配置......................................................................25带运动伪像消除功能的便携式心脏监护仪.....................25封装和订购信息...............................................