DB_PCap01Ax_0301_电容测试芯片

临时数据手册4®PCapØ1Ax-03012011年5月13日版本.:DB_PCap01-0301_eV0.4电容测量的单芯片方案带有标准固件03.01.02acam-messelectronicgmbh-AmHasenbiel27-D-76297Stutensee-Blankenloch-Germany-(datasheetandguide)isstillunderdevelopment,whichmayresultincorrections,modificationsoradditions.acamcannotbeheldli-ableforanyofitscontents,neitherforaccuracy,norforcompleteness.Thecompiledinformationisbelievedcorrect,thoughsomeerrorsandomissionsarelikely.Wewelcomeanynotification,whichwillbeintegratedinsucceedingre-leases.Theacamrecommendationsarebelieveduseful,thefirmwareproposalsandtheschematicsoperable,neverthelessitisofthecustomer‘ssoleresponsibilitytomodify,testandvalidatethembeforesettingupanyproductionprocess.acamproductsarenotdesignedforuseinmedical,nuclear,military,aircraft,spacecraftorlife-supportdevices.Noraretheysuitableforapplicationswhe-refailuremayprovokeinjurytopeopleorheavymaterialdamage.acamdeclinesanyliabilitywithrespecttosuchnon-intendeduse,whichremainsunderthecustomer‘ssoleresponsibilityandrisk.Military,spatialandnuclearusesub-jecttoGermanexportregulations.acamdonotwarrant,anditisnotimpliedthattheinformationand/orpracticepresentedhereisfreefrompatent,copyrightorsimilarprotection.Allregis-terednamesandtrademarksarementionedforreferenceonlyandremainthepro-pertyoftheirrespectiveowners.TheacamlogoandthePicoCaplogoareregis-teredtrademarksofacam-messelectronicgmbh,Germany.Support/ContactForacompletelistingofdirectsalescontacts,distributorsandsalesrepre-sentativesvisittheacamwebsiteat:@acam.deorbyphone+49724474190.Publishedbyacam-messelectronicgmbh©copyright2011byacam-messelectronicgmbh,Stutensee,Germanyacam-messelectronicgmbh-AmHasenbiel27-D-76297Stutensee-Blankenloch-Germany-存储&固件6.2存储器映射6-26-36.1DSP管理和编程5读&写寄存器5.3读寄存器5.1配置&参数寄存器5-25-125-155.2配置寄存器的说明4接口(串行通信和Pulse-Density通信)4.2PDM/PWM和GPIO4-24-64.1串行通信2特性及规格2.3RDC精度2.1电气特性2-22-32-72.2CDC精度2.5封装信息2-82-92.4功耗3.5选择放电电阻3-43-63.4连接电容传感器3.6补偿测量3-66.5入门指南6.3存储器管理6-36-36-56.4OTP固件编程acam-messelectronicgmbh-AmHasenbiel27-D-76297Stutensee-Blankenloch-Germany-为带有单片机处理单元的一款专门进行电容测量的电容数字转换单芯片方案。其前端转换单元是基于acam公司专利的4®测量原理.这种转换测量原理提供了对于转换时间范围最小可以到2µs的高精度时间转换.客户将会从这种测量原理的杰出灵活性，低功耗，高精度以及高速度的优势当中受益.这个手册描述了PCap01A的应用,带有标准固件03.01xx.它可以支持单一接地和差动传感器,以及单一漂移和差动传感器的连接.通过接地电容,芯片内部的寄生电容可以被补偿.通过漂移电容,内部的寄生电容以及外部的寄生电容都可以被补偿.另外,温度测量可以通过内部或者外部的温敏电阻来进行测量.带有固件03.01.xx的PCap01A提供了纯的电阻和电容的比率输出结果,没有进行任何额外的处理.1.1性能特点基于CMOS技术的数字测量原理ƒ在接地模式中最多可以测量8路电容ƒ在漂移模式最多可测量4路电容(零电势及零偏压)ƒ内部(接地)补偿和外部(漂移)寄生电容补偿ƒ高精度:最高达ƒ6aF在5Hz和10pF基础电容ƒ17位精度在5Hz和100pF基础电容和10pF的最大变化电容ƒ高测量频率:最高达500kHzƒ超低测量功耗可能:在3Hz带有13.4位测量精度情况下可以最低到4.0µA功耗ƒ超高的温度稳定性,超低温漂(每摄氏度漂移仅为30aF每摄氏度),低增益漂移当所有补偿全部开启的时候ƒ用于高精度温度测量的专有端口(应用Pt1000传感器,精度可达0.005K)ƒ串行通信接口(SPI兼容)ƒ内部集成电路接口(I2C兼容)ƒ自启动功能ƒ单一供电电源(2.1到3.6V)ƒ无需时钟ƒRISC内部单片机内核应用哈佛结构:ƒ48x48RAM数据ƒ4kx8非永久存储单元用于高速测量应用(40到100MHz)ƒ4kx8位永久性存储单元(OTP)用于一般速度的应用(最高到40MHz)1.2典型应用ƒ湿度传感器ƒ位移传感器ƒ压力传感器ƒ力学传感器ƒ加速度传感器ƒ倾角传感器ƒ角度传感器ƒ无线应用ƒ夜位开关传感器ƒ麦克风ƒMEMS传感器acam-messelectronicgmbh-AmHasenbiel27-D-76297Stutensee-Blankenloch-Germany-内部结构原理图acam-messelectronicgmbh-AmHasenbiel27-D-76297Stutensee-Blankenloch-Germany-漂移的电源相关性(PSRR)...........................................................................................2-62.2.4增益和零点offset漂移的温度相关性.......................................................................................................2-62.3RDC精度..................................................................................................................................2-72.4功耗.