AD7706 AD采集 STM32单片机控制的采集，采用SPI控制技术， 2-/3-Channel 16-Bit, Sigma-Delta ADCsFUNCTIONAL BLOCK DIAGRAMFEATURESAD7705: Two Fully Differential Input Channel ADCsAD7706: Three Pseudo Differential Input Channel ADCs16 Bits No Missing Codes0.003% Nonlinearity