A 10-Bit Power Efficient SAR ADC Designed with Enhanced Signal Integrity for Biomedical Applications

Biomedical devices require high resolution, fast conversion speeds, low power consumption, and compact designs to ensure accurate monitoring, diagnosis, and longer battery life. Traditional SAR ADCs often struggle with limitations in resolution, noise, power efficiency, and speed, which hinders their applicability in healthcare. This research introduces a 10-bit low-noise SAR ADC designed with 90 nm CMOS technology operating at a 1V supply, achieving a power consumption of 11.887 microwatts for a 1-megahertz sinusoidal input signal. The design incorporates a double-tail dynamic latch comparator, known for its optimal power usage and minimal propagation delay, and explores split capacitive DAC structures for enhanced low-power efficiency. These improvements make the ADC suitable for reliable and energy-efficient biomedical applications, advancing healthcare technology.