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AD7745

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745

24位、單通道電容數(shù)字轉(zhuǎn)換器; ? 采用單芯片解決方案的新標(biāo)準(zhǔn)\n\n? 可與單一或差分浮動(dòng)式傳感器接口\n\n? 分辨率：最低4 aF（即最高21 ENOB）\n\n? 精度：4 fF\n\n? 線性度：0.01%\n\n? 共模（不可變）電容最大可達(dá)17 pF\n\n? 滿量程（可變）電容范圍：±4 pF\n\n? 耐受對地寄生電容：最大60 pF\n\n\n\n? 更新速率：10 Hz～90 Hz\n\n? 16 Hz時(shí)，50 Hz、60 Hz同時(shí)抑制\n\n? 片內(nèi)溫度傳感器\n? 分辨率：0.1°C，精度：±2°C\n\n? 電壓輸入通道\n\n? 內(nèi)部時(shí)鐘振蕩器\n\n? 雙線式串行接口（I2C?兼容）\n\n? 電源：\n? 2.7 V至5.25 V單電源工作\n? 功耗：0.7 mA\n\n? 工作溫度范圍：–40°C～+125°C\n\n? 16引腳TSSOP封裝;

AD7745/AD7746均為高分辨率、Σ-Δ電容數(shù)字轉(zhuǎn)換器（CDC），可直接與電容傳感器的電容連接進(jìn)行測量。該芯片還具有高分辨率（24位無失碼、最高21位有效分辨率）、高線性度（±0.01%）和高精度（±4 fF工廠校準(zhǔn)）等固有特性。AD7745/AD7746的電容輸入范圍是±4 pF（可變），同時(shí)可接受最大17 pF共模電容（不可變），后者可以通過一個(gè)可編程片內(nèi)數(shù)字電容轉(zhuǎn)換器（CAPDAC）來平衡。 AD7745擁有一個(gè)電容輸入通道，AD7746則擁有兩個(gè)通道。每個(gè)通道均可配置為單端輸入或差分輸入方式。AD7745/AD7746針對浮動(dòng)式電容傳感器而設(shè)計(jì)。若需一塊極板接地的電容傳感器，推薦使用AD7747。\n\n 這些器件內(nèi)置一個(gè)片內(nèi)溫度傳感器，其分辨率為0.1°C，精度為±2°C；還集成片內(nèi)基準(zhǔn)電壓源和片內(nèi)時(shí)鐘發(fā)生器，因此在電容傳感器應(yīng)用中無需任何額外外部元件。兩款器件都有一個(gè)標(biāo)準(zhǔn)電壓輸入，當(dāng)與差分基準(zhǔn)電壓輸入結(jié)合使用時(shí)，可方便地與一個(gè)外部溫度傳感器（如RTD、熱敏電阻或二極管等）接口。\n\n AD7745/AD7746均有一個(gè)雙線式I2C兼容串行接口，二者均可采用2.7 V至5.25 V單電源供電，額定溫度范圍為–40°C至+125°C汽車電子溫度范圍，采用16引腳TSSOP封裝。\n\n

AD7745ARUZ

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745ARUZ

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745ARUZ-REEL

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745ARUZ-REEL

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745ARUZ-REEL7

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745ARUZ-REEL7

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

GENERALDESCRIPTION TheAD7745/AD7746areahighresolution,Σ-Δcapacitance-to-digitalconverter(CDC).Thecapacitancetobemeasuredisconnecteddirectlytothedeviceinputs.Thearchitecturefeaturesinherenthighresolution(24-bitnomissingcodes,upto21-biteffectiveresolution),high

AD7745_15

24-Bit Capacitance-to-Digital Converter with Temperature Sensor

AD7745ARUZ

Package：16-TSSOP（0.173"，4.40mm 寬）；包裝：管件 類別：集成電路（IC） ADC/DAC - 特殊用途 描述：IC CAP TO DGT CONV 24BIT 16TSSOP