AD7699-cn

Rev.BInformationfurnishedbyAnalogDevicesisbelievedtobeaccurateandreliable.However,noresponsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorotherrightsofthirdpartiesthatmayresultfromitsuse.Specicationssubjecttochangewithoutnotice.NolicenseisgrantedbyimplicationorotherwiseunderanypatentorpatentrightsofAnalogDevices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.OneTechnologyWay,P.O.Box9106,Norwood,MA02062-9106,U.S.A.Tel:[phone]©2008–2012AnalogDevices,Inc.Allrightsreserved.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。功能框图AD7699REFGNDVDDVIODINSCKSDOCNV1.8VTOVDD5VSEQUENCERSPISERIALINTERFACEMUX16-BITSARADCBANDGAPREFTEMPSENSORREFININ0IN1IN4IN5IN6IN7IN3IN2COM0.5VTOVDD10µFONE-POLELPF0.5VTO4.096V0.1µF07354-001图1.表1.多通道14/16位PulSAR®ADC类型通道250kSPS500kSPSADC驱动器14位8AD7949ADA4841-x16位4AD7682ADA4841-x16位8AD7689AD7699ADA4841-x16位、8通道、500kSPSPulSARADCAD7699产品特性16位分辨率、无失码8通道多路复用器，输入可选择单极性单端输入差分输入(使用参考地)伪双极性输入吞吐速率：500kSPS积分非线性(INL)：典型值：±0.5LSB，最大值：±1.5LSB(±23ppm或FSR)动态范围：93.3dB信纳比(SINAD)：91.5dB(20kHz)总谐波失真(THD)：-97dB(20kHz)模拟输入范围：0V至VREF(VREF可高达VDD)多种基准源类型内部4.096V基准源外部缓冲基准源(可达4.096V)外部基准源(可达VDD)内部温度传感器通道序列器，可选单极点滤波器，繁忙指示器无流水线延迟，SAR架构单电源工作，电源电压5V逻辑接口电压：1.8V至5V串行接口，兼容SPI、MICROWIRE、QSPI和DSP功耗26mW@500kSPS5.2μW@100SPS待机电流：50nA20引脚4mm×4mmLFCSP封装应用电池供电设备医疗仪器：ECG/EKG移动通信：GPS个人数字助理电力线路监控数据采集地震数据采集系统仪器仪表过程控制概述AD7699是一款8通道、16位、电荷再分配逐次逼近型模数转换器(ADC)，采用单电源供电。AD7699内置多通道、低功耗数据采集系统所需的所有元件，包括：无失码的真16位SARADC；用于将输入配置为单端输入(使用或不使用参考地)、差分输入或双极性输入的8通道、低串扰多路复用器；内部4.096V低漂移基准电压源和缓冲器；温度传感器；可选的单极点滤波器；以及多通道按顺序连续采样时所用的序列器。AD7699使用简单的串行端口接口(SPI)实现配置寄存器的写入和转换结果的接收。SPI接口使用单独的电源(VIO)，它被设定为主逻辑电平。功耗与吞吐速率成正比。AD7699采用20引脚微型LFCSP封装，工作温度范围为−40°C至+85°C。Rev.B|Page2of28目录AD7699特性.....................................................................................................1应用.....................................................................................................1功能框图............................................................................................1概述.....................................................................................................1修订历史............................................................................................2技术规格............................................................................................3时序规格............................................................................................5绝对最大额定值...............................................................................6ESD警告........................................................................................6引脚配置和功能描述......................................................................7典型性能参数...................................................................................8术语...................................................................................................12工作原理..........................................................................................13概述.............................................................................................13转换器操作................................................................................13传递函数.....................................................................................14典型连接图................................................................................15模拟输入.....................................................................................16驱动放大器选择........................................................................18基准电压输出/输入..................................................................18电源.............................................................................................19从基准源为ADC供电..............................................................19数字接口..........................................................................................20转换期间读取/写入，快速主机............................................20采集时读取/写入，任何速度主机.......................................20转换全程读取/写入，任何速度主机...................................20配置寄存器，CFG....................................................................20无繁忙指示器的通用时序......................................................22无繁忙指示器的转换全程读取/写入...................................23含繁忙指示器的通用时序......................................................24含繁忙指示器的转换全程读取/写入...................................25应用须知..........................................................................................26布局.............................................................................................26评估AD7699性能......................................................................26外形尺寸..........................................................................................27订购指南.....................................................................................27修订历史2012年3月—修订版A至修订版B更改图28..........................................................................................15更改“内部基准电压源/温度传感器”和“