CS5555-DATASHEET-CN

CooperationElectronictechnologyCo.,Ltd.Taiwan/Singapore頁124-BitSigma-DeltaADCForBridgeSensor,Pin-Programmable,lowPowerCS5555功能特性集成低雜訊PGA，放大倍數可選64，128集成2通道24位無失碼的差分輸入ADC，PGA=128時ENOB為20.5位P-P雜訊：10Hz：140nV；80Hz：300nV內部集成RC振盪器輸出速率10Hz/80Hz可選集成2線SPI通訊介面INL小於0.001%應用場合工業程序控制電子秤液體/氣體化學分析血液計智能變換器可擕式設備功能方塊圖Figure1.Table1.概述CS5555是高精度、低功耗模數轉換晶片。其解析度為24bit，有效解析度可達20.5位。可以廣泛使用在工業控制、量重、壓力、液體/氣體化學分析、血液分析、智慧發送器、便攜測量儀器領域。CS5555是一款高精度、低功耗Sigma-Delta模數轉換晶片，內置1路Sigma-DeltaADC。ADC採用三階Sigma-Delta調製器，通過低雜訊儀用放大器結構實現PGA放大，放大倍數可選64，128。在PGA=128時，有效解析度可達20.5位。CS5555輸出速率10Hz/80Hz可選。CS5555內置RC振盪器。CS5555具有待機、斷電等更低功耗模式。CooperationElectronictechnologyCo.,Ltd.Taiwan/Singapore頁2CS5555目錄TABLEOFCONTENTS功能特性...........................................................................................................1功能方塊圖........................................................................................................1應用場合............................................................................................................1概述.................................................................................................................1修訂追蹤............................................................................................................2電器規格............................................................................................................3電器絕對最大極限值......................................................................................5雜訊性能............................................................................................................5晶片引腳............................................................................................................6功能模組描述.....................................................................................................7模擬輸入............................................................................................................7低噪聲放大器.....................................................................................................7復位和斷電........................................................................................................7數位邏輯特性...................................................................................................7SPI串口通信.......................................................................................................8ADC轉換建立時間............................................................................................8輸出速率............................................................................................................9資料格式..........................................................................................................9資料準備/資料輸出(DOUT)..........................................................................9串列時鐘輸入(SCLK)....................................................................................9資料接收.........................................................................................................10待機模式........................................................................................................11斷電模式........................................................................................................12斷電後上電順序..............................................................................................12應用電路........................................................................................................13封裝.................................................................................................................14修訂追蹤CooperationElectronictechnologyCo.,Ltd.Taiwan/Singapore頁3CS5555電器規格-1所有的參數測試在環境溫度-20~85℃,AVDD=5V，DVDD=5V，REFP=5V，REFN=0V的條件下測試CS5555Table2.參數條件最小值典型值最大值單位模擬輸入滿幅輸入電壓(AINP-AIN)±0.5VREF/PGAV共模輸入電壓PGA=64，128AGND+1.5AVDD-1.5V共模電壓抑制比125dB差分輸入阻抗PGA=64、1281GΩ系統性能解析度無失碼24BitsAD速率時鐘為4.9152MHz1080Hz建立時間全建立4轉換週期P-P雜訊PGA=128，DR=10Hz139nv積分線性度PGA=128±6ppm失調誤差PGA=128-1uV失調誤差漂移PGA=12825nv/℃增益誤差PGA=128±0.1%增益誤差漂移PGA=1286ppm/℃參考電壓輸入負參考電壓輸入REFNAGND-0.1AGND+0.6V正參考電壓輸入REFPREFN+2.5AVDD+0.1VREFP－REFN2.5AVDDAVDD+0.1V參考電壓抑制比54dB電源類比電源電壓AVDD2.855.5V數位電源電壓DVDD2.855.5V電源電壓抑制比PGA=64、128110dB類比部分電流普通模式PGA=64、1283mAStandbymode6uAPowerdown0.1uA數位元部分電流normalmode400uAStandbymode150uAPowerdown1.5uA時鐘內部振盪器頻率4.655.4MHz內置時鐘溫漂250ppm/℃CooperationElectronictechnologyCo.,Ltd.Taiwan/Singapore頁4CS5555電器規格-2所有的參數測試在環境溫度-20~85℃,AVDD=3V，DVDD=3V，REFP=3V，REFN=0V的條件下測試CS5555Table3.參數條件最小值典型值最大值單位模擬輸入滿幅輸入電壓(AINP-AIN)0.5VREF/PGAV共模輸入電壓PGA=64，128AGND+1.5AVDD-1.5V共模電壓抑制比125dB差分輸入阻抗PGA=64、1281GΩ系統性能解析度無失碼24BitsAD速率時鐘為4.9152MHz1080Hz建立時間全建立4轉換週期P-P雜訊PGA=128，DR=10Hz145nv積分線性度PGA=128±6ppm失調誤差PGA=128-1uV失調誤差漂移PGA=12825nv/℃增益誤差PGA=128±0.1%增益誤差漂移PGA=1286ppm/℃參考電壓輸入負參考電壓輸入REFNAGND-0.1AGND+0.6V正參考電壓輸入REFPREFN+1.5AVDD+0.1VREFP－REFN1.5AVDDAVDD+0.1V參考電壓抑制比54dB電源類比電源電壓AVDD2.855.5V數位電源電壓DVDD2.855.5V電源電壓抑制比PGA=64、128110dB類比部分電流普通模式PGA=64、1282.7mAStandbymode3uAPowerdown0.1uA數位元部分電流normalmode360uAStandbymode100uAPowerdown1.5uA時鐘內部振盪器頻率4.455.6MHz內置時鐘溫漂250ppm/℃CooperationElectronictechnologyCo.,Ltd.Taiwan/Singapore頁5CS55