silicon-sensor-si114x

Rev.1.415/15版权©2015SiliconLaboratoriesSi1141/42/43Si1141/42/43带I2C接口的临近/环境光传感器IC功能应用说明Si1141/42/43是基于反射的低功率红外线临近和环境光传感器，带有I2C数字接口和可编程事件中断输出。此非接触传感器IC包括模拟到数字转换器、集成高灵敏度可见和红外线光电二极管、数字信号处理器和具有十五个可选驱动电平的一个、两个或三个集成红外线LED驱动器。Si1141/42/43在广泛的动态范围和包括阳光直射在内的各种光源下可提供优异性能。Si1141/42/43还可以在深色玻璃盖下工作。光电二极管响应和关联的数字转换电路对人造光闪烁噪声和自然光颤动噪声具有优异的抗扰性。Si1142/43具有两个或多个LED，能够支持多轴式临近运动探测。Si1141/42/43器件在10引线2x2mmQFN封装中提供，能够在–40至+85°C温度范围中在1.71至3.6V的条件下运行。集成红外线临近探测器临近探测可从1cm以下调节到超过200cm三个独立的LED驱动器每个LED驱动器有15个电流设置，从5.6mA到360mA25.6µsLED驱动器脉冲宽度50cm临近范围，具有单个脉冲(3klx)15cm临近范围，具有单个脉冲(3klx)运行时高达128klx（阳光直射）高反射灵敏度1µW/cm2高电磁抗扰性，无屏蔽封装集成环境光传感器分辨率可以达到100mlx，允许在深色玻璃下工作在两个ADC范围设置之间动态范围可以达到1至128klx使用红外校正算法可以准确测量照明度业界最低的功耗1.71至3.6V电源电压9µA平均电流（180mA和3µASi114x电源时每800msLED脉冲25.6µs）500nA待机电流25.6µsLED“开启”时间使总功耗占空比较低，不会影响性能和抗扰度支持内部和外部唤醒内置电压电源监控器和接通电源复位控制器串行通信数据速率高达3.4Mbps从模式硬件地址解码(0x5A)小外形10引线2x2mmQFN温度范围–40至+85°C手机心率监控脉搏血氧计可穿戴音频产品安全面板窜改探测电路分配器阀门控制烟雾探测器非接触开关非接触滑动器占位传感器消费类电子设备工业自动化显示屏背光控制光中断器PinAssignmentsLED1VDDSCLGNDINT2349876QFN-10LED3/CVDDLED2/CVDDSDA1DNC105DNCSi1141/42/432Rev.1.41功能框图Figure1.Si1141BasicApplicationFigure2.Si1143ApplicationwithThreeLEDsandSeparateLEDPowerSupply注：有关更多的应用示例，请参阅“AN498：Si114x设计者指南”。VisibleVDDSDASCLRegulatorI2CLEDDriversLED1LED32LED21GNDINTInfraredRegistersAMUXADCTempFilterOscillatorDigitalSequencer&ControlLogic1.Si1142andSi1143only.MustbetiedtoVDDwithSi1141.2.Si1143only.MustbetiedtoVDDwithSi1141andSi1142.SDASCLVDDINTLED1GNDCVDDCVDDSi114115µF,20%,6V30ohm5%,1/16W3.3V0.1uFHostSDASCLINTSDASCLVDDINTLED1GNDLED3LED2Si114322uF,20%,6V30ohm5%,1/16W3.3V0.1uFHost4.3VNoPopSi1141/42/43Rev.1.413目录章节页码电气规格..................................................................4性能表................................................................4典型性能图............................................................10功能描述..................................................................12简介.................................................................12临近感应(PS)..........................................................12环境光...............................................................13主机接口.............................................................14运行模式..................................................................17关闭模式..............................................................17初始化模式............................................................17备用模式..............................................................17强制转换模式..........................................................17自发运行模式..........................................................18编程指南..................................................................19命令和响应结构........................................................19命令协议..............................................................20资源汇总..............................................................23信号通路软件模型......................................................28I2C寄存器............................................................29参数RAM.............................................................52引脚说明..................................................................67订购指南..................................................................68包装外形：10引脚QFN.....................................................69建议的PCB焊盘图案........................................................71文档更改列表..............................................................73联系信息..................................................................75Si1141/42/434Rev.1.411.电气规格1.1.性能表Table1.RecommendedOperatingConditionsParameterSymbolConditionMinTypMaxUnitVDDSupplyVoltageVDD1.71—3.6VVDDOFFSupplyVoltageVDD_OFFOFFmode–0.31.0VVDDSupplyRippleVoltageVDD=3.3V1kHz–10MHz——50mVppOperatingTemperatureT–402585°CSCL,SDA,InputHighLogicVoltageI2CVIHVDDx0.7—VDDVSCL,SDAInputLowLogicVoltageI2CVIL0—VDDx0.3VPSOperationunderDirectSunlightEdc——128klxIrLEDEmissionWavelengthl750850950nmIrLEDSupplyVoltageVLEDIrLEDVF=1.0VnominalVDD—4.3VIrLEDSupplyRippleVoltageAppliesifIrLEDsuseseparatesupplyrail0–30kHz30kHz–100MHz————250100mVppmVppStart-UpTimeVDDabove1.71V25——msLED3VoltageStart-upVDDx0.77——VTable2.PerformanceCharacteristics1ParameterSymbolConditionMinTypMaxUnitIDDOFFModeIoffVDDVDD_OFF(leakagefromSCL,SDA,andINTnotincluded)—2401000nAIDDStandbyModeIsbNoALS/PSConversionsNoI2CActivityVDD=1.8V—150500nANotes:1.UnlessspecificallystatedinConditions,electricaldataassumesambientlightlevels1klx.2.Proximity-detectionperformancemaybedegraded,especiallywhenthereishighopticalcrosstalk,iftheLEDsupplyandvoltagedropallowthedrivertosaturateandcurrentregulationislost.3.Guaranteedbydesignandcharacterization.4.RepresentsthetimeduringwhichthedeviceisdrawingacurrentequaltoIactiveforpowerestimationpurposes.Assumesdefaultsettings.Si1141/42/43Rev.1.415IDDStandbyModeIsbNoALS/PSConversionsNoI2CActivityVDD=3.3V—1.4—µAIDDActivelyMeasuringIactiveWithoutLEDinfluence,VDD=3.3V—4.35.5mAPeakIDDwhileLED1,LED2,orLED3isActivelyDrivenVDD=3.3V—8—mALEDDriverSaturationVoltage