1746-IH16
1746-IH16
積分非線性
另外一個(gè)DAC靜態(tài)技術(shù)規(guī)格為積分非線性 （INL），它是DAC真實(shí)轉(zhuǎn)換函數(shù)到理想轉(zhuǎn)換函數(shù)輕微偏離的測量值（圖8）。積分非線性、線性誤差、或者INL是DNL誤差的zui高值。這個(gè)技術(shù)規(guī)格使用*直線或端到端（端點(diǎn)線性）直線來量化INL，單位為LSB。
圖8
INL技術(shù)規(guī)格定義了*直線或端到端直線與理想DAC轉(zhuǎn)換函數(shù)之間的zui差情況距離。
諸如仲裁波形發(fā)生器的應(yīng)用需要有較好的INL。
在數(shù)據(jù)表之間比較技術(shù)規(guī)格
當(dāng)將一個(gè)數(shù)據(jù)表與另一個(gè)數(shù)據(jù)表進(jìn)行比較時(shí)，技術(shù)規(guī)格也許會(huì)有不同的測量單位。例如，在一個(gè)數(shù)據(jù)表中，偏移誤差的單位也許是伏，而在另外一個(gè)數(shù)據(jù)表中，單位也許是LSB或FSR的百分比。表1提供了在LSB、伏、FSR百分比和PPM（百萬分率）之間的轉(zhuǎn)換計(jì)算方法。
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