Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications

Table 1

Comparison between different SAH structures.

Structure	CMOS transmission gates	Bootstrap switch	Double bootstrap switch	Bootstrap switch followed by a dummy switch
Dynamic linearity	Poor	Good	Very high	High
Power consumption	Very low	Low	High	Average
Common mode noise immunity	Low	Average	High	High
Charge injection and clock feed through distortion	High	Average	Low	Very low