Versatile SAR-ADC for Biomedical Applications

This paper presents a versatile SAR ADC targeting the acquisition of signals in biomedical applications. The converter is implemented in a CMOS AMS 0.35µm technology and powered with 3.3V. Its output bit-width can be varied from 4 to 8 bits. The device includes built-in programmable clock generator and voltage reference circuit. The sampling rate can be tuned up to 100kS/s in the 8-bit mode and with a maximal input range of 2.5V. All these parameters can be independently adjusted. This is an unique fully-configurable converter. The simulation results are reported and positioned with respect to the most recent designs.