CLAMP CLAMP IN CLK AVDD DRVDD 0 0 0 OSTBY SHA SHA GAIN SHA GAIN SHA GAIN SHA GAIN OMODE VINA O A/D REFTFO THREE- REFTSO A/D A/D DIA STATE REFBSO CORRECTION LOGIC REFBFO OUTPUT BUFFERS OTR VREF REFSENSE 1V AD9280 D7(MSB) DO(LSB) AVSS DRVSS