低噪声、低失真、16Bit、1Msps的SAR ADC驱动教程

LTC2393-16具有全差分输入，与传统差分输入的ADC相比，可提高SNR性能6dB左右。适用于要求低失真、大动态范围的应用。获得低噪声、低失真性能需采用正确的元件和好的布线。DrivingLessonsforaLowNoise,LowDistortion,16-Bit,1MspsSARADCDesignNote477GuyHooverIntroductionmaintainingperformance.AlloftheresistorsusedinthisDesigninganADCdrivingtopologythatdeliversuncom-circuitarerelativelylowvalues.Thiskeepsthenoiseandpromisingperformanceischallenging,especiallywhensettlingtimelow.MetalfilmresistorsarerecommendeddesigningaroundanultralownoiseSARADCsuchasthetoreducedistortioncausedbyself-heating.AnNPO1MspsLTC2393-16.Forbothsingle-endedanddifferentialcapacitorisusedforC2becauseofitslowvoltagecoef-applications,a