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AD7142

Programmable Capacitance-to-Digital Converter with Environmental Compensation

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142

電容式觸摸傳感器專用可編程控制器; ? 可編程的電容數(shù)字轉(zhuǎn)換器\n36 ms的更新速率（最大序列長度時(shí)）\n分辨率優(yōu)于1 fF\n14個(gè)電容式傳感器輸入通道\n無需使用外部RC調(diào)諧元件\n自動轉(zhuǎn)換定序器\n\n? 片內(nèi)自動校準(zhǔn)邏輯\n自動補(bǔ)償環(huán)境變化\n自適應(yīng)的閾值和靈敏度電平\n\n? 用片內(nèi)RAM存儲校準(zhǔn)數(shù)據(jù)\n\n? SPI?兼容型串行接口(AD7142) \n\n? I2C?兼容型串行接口(AD7142-1) \n\n\n\n? 串行接口專用獨(dú)立VDRIVE電平\n\n? 中斷輸出和GPIO \n\n? 32-引腳、5 mm x 5 mm LFCSP_VQ封裝 \n\n? 電源電壓：2.6 V至3.6 V\n\n? 低工作電流\n全功率模式：小于1 mA\n低功耗模式：50 μA;

AD7142和AD7142-1是具有片內(nèi)環(huán)境校準(zhǔn)功能的集成式電容-數(shù)字轉(zhuǎn)換器(CDC)，可用于需要采用新型用戶輸入法的系統(tǒng)。AD7142和AD7142-1可與外部電容式傳感器接口，從而實(shí)現(xiàn)電容按鈕、滾動條或滾輪等功能。\n\n 該CDC有14個(gè)輸入通道，通過一個(gè)開關(guān)矩陣與一個(gè)16位、250 kHz Σ-Δ型電容數(shù)字轉(zhuǎn)換器相連。該CDC能夠感知外部傳感器的電容變化，并借助此信息來記錄傳感器激活事件。外部傳感器既可配置成一系列按鈕，也可配置成一個(gè)滾動條或滾輪，或者各類傳感器的組合。通過對寄存器進(jìn)行編程，用戶可完全控制CDC設(shè)置。高分辨率傳感器要求在主處理器上運(yùn)行較少的軟件。 \n\n AD7142和AD7142-1配有片內(nèi)校準(zhǔn)邏輯，用以處理周圍環(huán)境發(fā)生的變化。傳感器閑置時(shí)，校準(zhǔn)序列將自動按連續(xù)間隔執(zhí)行。由此避免發(fā)生因環(huán)境變化導(dǎo)致的外部傳感器誤觸或觸摸未記錄事件。\n\n AD7142采用SPI兼容型串行接口，AD7142-1則采用I2C兼容型串行接口。兩者都有中斷輸出和通用輸入/輸出(GPIO)。\n\n AD7142和AD7142-1均采用32引腳5 mm ?5 mm LFCSP_VQ封裝，工作電壓為2.6 V～3.6 V。工作電耗低于1 mA，在低功耗模式（轉(zhuǎn)換間隔為400 ms）下可降至50 μA。\n\n

AD7142

Programmable Controller for Capacitance Touch Sensors

AD7142ACPZ-1500RL71

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142ACPZ-1REEL1

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142ACPZ-500RL7

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142ACPZ-500RL71

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142ACPZ-REEL1

Programmable Controller for Capacitance Touch Sensors

GENERALDESCRIPTION TheAD7142andAD7142-1areintegratedcapacitance-to-digitalconverters(CDCs)withon-chipenvironmentalcalibrationforuseinsystemsrequiringanoveluserinputmethod.TheAD7142andAD7142-1caninterfacetoexternalcapacitancesensorsimplementingfunctionssuchasc

AD7142_15

Programmable Controller for Capacitance Touch Sensors